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apache / xerces2-j / f59f47412e404f4984480a45a99957ac07d287d4 / . / src / org / apache / xerces / impl / xpath / XPath.java
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/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2000,2001 The Apache Software Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
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* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
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*
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xerces.impl.xpath;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.util.XMLChar;
import org.apache.xerces.xni.NamespaceContext;
import org.apache.xerces.xni.QName;
/**
* Bare minimum XPath parser.
*
* @author Andy Clark, IBM
* @version $Id$
*/
public class XPath {
//
// Constants
//
private static final boolean DEBUG_ALL = false;
private static final boolean DEBUG_XPATH_PARSE = DEBUG_ALL || false;
private static final boolean DEBUG_ANY = DEBUG_XPATH_PARSE;
//
// Data
//
/** Expression. */
protected String fExpression;
/** Symbol table. */
protected SymbolTable fSymbolTable;
/** Location paths. */
protected LocationPath[] fLocationPaths;
//
// Constructors
//
/** Constructs an XPath object from the specified expression. */
public XPath(String xpath, SymbolTable symbolTable,
NamespaceContext context)
throws XPathException {
fExpression = xpath;
fSymbolTable = symbolTable;
parseExpression(context);
} // <init>(String,SymbolTable,NamespaceContext)
//
// Public methods
//
/**
* Returns a representation of all location paths for this XPath.
* XPath = locationPath ( '|' locationPath)
*/
public LocationPath[] getLocationPaths() {
LocationPath[] ret=new LocationPath[fLocationPaths.length];
for (int i=0;i<fLocationPaths.length;i++){
ret[i]=(LocationPath)fLocationPaths[i].clone();
}
return ret;
} // getLocationPath(LocationPath)
/** Returns a representation of the first location path for this XPath. */
public LocationPath getLocationPath() {
return (LocationPath)fLocationPaths[0].clone();
} // getLocationPath(LocationPath)
//
// Object methods
//
/** Returns a string representation of this object. */
public String toString() {
StringBuffer buf=new StringBuffer();
for (int i=0;i<fLocationPaths.length;i++){
if (i>0){
buf.append("|");
}
buf.append(fLocationPaths[i].toString());
}
return buf.toString();
} // toString():String
//
// Private methods
//
/**
* This method is implemented by using the XPathExprScanner and
* examining the list of tokens that it returns.
*/
private void parseExpression(final NamespaceContext context)
throws XPathException {
// tokens
final XPath.Tokens xtokens = new XPath.Tokens(fSymbolTable);
// scanner
XPath.Scanner scanner = new XPath.Scanner(fSymbolTable) {
protected void addToken(XPath.Tokens tokens, int token)
throws XPathException {
if (
token == XPath.Tokens.EXPRTOKEN_ATSIGN ||
token == XPath.Tokens.EXPRTOKEN_AXISNAME_ATTRIBUTE ||
token == XPath.Tokens.EXPRTOKEN_AXISNAME_CHILD ||
//token == XPath.Tokens.EXPRTOKEN_AXISNAME_SELF ||
token == XPath.Tokens.EXPRTOKEN_DOUBLE_COLON ||
//token == XPath.Tokens.EXPRTOKEN_NAMETEST_ANY ||
token == XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME ||
//token == XPath.Tokens.EXPRTOKEN_NODETYPE_NODE ||
token == XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH ||
token == XPath.Tokens.EXPRTOKEN_PERIOD ||
//added to conform to PR Spec
token == XPath.Tokens.EXPRTOKEN_NAMETEST_ANY ||
token == XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE ||
token == XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH ||
token == XPath.Tokens.EXPRTOKEN_OPERATOR_UNION
//
) {
super.addToken(tokens, token);
return;
}
StringBuffer str = new StringBuffer();
str.append("token not supported: ");
String tokenName = tokens.getTokenName(token);
if (tokenName != null) {
str.append('"');
str.append(tokenName);
str.append('"');
}
else {
str.append('(');
str.append(token);
str.append(')');
}
String message = str.toString();
throw new XPathException(message);
}
};
int length = fExpression.length();
/***/
boolean success = scanner.scanExpr(fSymbolTable,
xtokens, fExpression, 0, length);
//fTokens.dumpTokens();
java.util.Vector stepsVector = new java.util.Vector();
java.util.Vector locationPathsVector= new java.util.Vector();
int tokenCount = xtokens.getTokenCount();
boolean firstTokenOfLocationPath=true;
final String emptySymbol = fSymbolTable.addSymbol("");
for (int i = 0; i < tokenCount; i++) {
int token = xtokens.getToken(i);
boolean isNamespace=false;
switch (token) {
case XPath.Tokens.EXPRTOKEN_OPERATOR_UNION :{
if (i == 0) {
throw new XPathException("not allowed to have '|' at the beginning of an xpath value");
}
int size = stepsVector.size();
if (size == 0) {
throw new XPathException("not allowed to have '||'");
}
Step[] steps = new Step[size];
stepsVector.copyInto(steps);
// add location path
locationPathsVector.addElement(new LocationPath(steps));
//reset stepsVector
stepsVector.removeAllElements();
firstTokenOfLocationPath=true;
break;
}
case XPath.Tokens.EXPRTOKEN_AXISNAME_ATTRIBUTE: {
// consume "::" token and drop through
i++;
}
case XPath.Tokens.EXPRTOKEN_ATSIGN: {
// consume QName token
if (i == tokenCount - 1) {
throw new XPathException("missing attribute name");
}
token = xtokens.getToken(++i);
if (token != XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME
&& token!= XPath.Tokens.EXPRTOKEN_NAMETEST_ANY
&& token!= XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE) {
throw new XPathException("expected \""+xtokens.getTokenName(XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME)+
"\" or \""+xtokens.getTokenName( XPath.Tokens.EXPRTOKEN_NAMETEST_ANY)+
"\" or \""+xtokens.getTokenName( XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE)+
"\", found "+xtokens.getTokenName(token));
}
boolean isNamespaceAtt=false;
switch (token)
{
case XPath.Tokens.EXPRTOKEN_NAMETEST_ANY:{
Axis axis = new Axis(Axis.ATTRIBUTE);
NodeTest nodeTest = new NodeTest(NodeTest.WILDCARD);
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
break;
}
case XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE:{
isNamespaceAtt=true;
}
case XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME:{
token = xtokens.getToken(++i);
String prefix = xtokens.getTokenString(token);
String uri = null;
if (context != null && prefix != emptySymbol) {
uri = context.getURI(prefix);
}
if (prefix != emptySymbol && context != null && uri == null) {
throw new XPathException("prefix "+prefix+" not bound to namespace URI");
}
if (isNamespaceAtt)
{
// build step
Axis axis = new Axis(Axis.ATTRIBUTE);
NodeTest nodeTest = new NodeTest(prefix, uri);
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
break;
}
token = xtokens.getToken(++i);
String localpart = xtokens.getTokenString(token);
String rawname = prefix != emptySymbol
? fSymbolTable.addSymbol(prefix+':'+localpart)
: localpart;
// build step
Axis axis = new Axis(Axis.ATTRIBUTE);
NodeTest nodeTest = new NodeTest(new QName(prefix, localpart, rawname, uri));
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
break;
}
}
firstTokenOfLocationPath=false;
break;
}
/***
case XPath.Tokens.EXPRTOKEN_AXISNAME_SELF: {
break;
}
/***/
case XPath.Tokens.EXPRTOKEN_DOUBLE_COLON: {
// should never have a bare double colon
throw new XPathException("Not allowed to have double colon here");
}
/***
case XPath.Tokens.EXPRTOKEN_NAMETEST_ANY: {
break;
}
/***/
case XPath.Tokens.EXPRTOKEN_AXISNAME_CHILD: {
// consume "::" token and drop through
i++;
if (i == tokenCount - 1) {
throw new XPathException("expected step following '"
+xtokens.getTokenName(XPath.Tokens.EXPRTOKEN_AXISNAME_CHILD)+"::'");
}
firstTokenOfLocationPath=false;
break;
}
case XPath.Tokens.EXPRTOKEN_NAMETEST_ANY:{
Axis axis = new Axis(Axis.CHILD);
NodeTest nodeTest = new NodeTest(NodeTest.WILDCARD);
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
firstTokenOfLocationPath=false;
break;
}
case XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE:{
isNamespace=true;
}
case XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME: {
// consume QName token
token = xtokens.getToken(++i);
String prefix = xtokens.getTokenString(token);
String uri = null;
if (context != null && prefix != emptySymbol) {
uri = context.getURI(prefix);
}
if (prefix != emptySymbol && context != null && uri == null) {
throw new XPathException("prefix "+prefix+" not bound to namespace URI");
}
if (isNamespace)
{
// build step
Axis axis = new Axis(Axis.CHILD);
NodeTest nodeTest = new NodeTest(prefix, uri);
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
break;
}
token = xtokens.getToken(++i);
String localpart = xtokens.getTokenString(token);
String rawname = prefix != emptySymbol
? fSymbolTable.addSymbol(prefix+':'+localpart)
: localpart;
// build step
Axis axis = new Axis(Axis.CHILD);
NodeTest nodeTest = new NodeTest(new QName(prefix, localpart, rawname, uri));
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
firstTokenOfLocationPath=false;
break;
}
/***
case XPath.Tokens.EXPRTOKEN_NODETYPE_NODE: {
break;
}
/***/
case XPath.Tokens.EXPRTOKEN_PERIOD: {
// build step
Axis axis = new Axis(Axis.SELF);
NodeTest nodeTest = new NodeTest(NodeTest.NODE);
Step step = new Step(axis, nodeTest);
stepsVector.addElement(step);
if (firstTokenOfLocationPath && i+1<tokenCount){
token=xtokens.getToken(i+1);
if (token == XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH){
i++;
if (i == tokenCount - 1) {
throw new XPathException("expected step following '//'");
}
if (i+1<tokenCount) {
token=xtokens.getToken(i+1);
if (token==XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH)
throw new XPathException("'/' not allowed after '//'");
}
// build step
axis = new Axis(Axis.DESCENDANT);
nodeTest = new NodeTest(NodeTest.NODE);
step = new Step(axis, nodeTest);
stepsVector.addElement(step);
}
}
firstTokenOfLocationPath=false;
break;
}
case XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH:{
throw new XPathException("'//' only allowed after '.' at the beginning of an xpath");
}
case XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH: {
if (i == 0) {
throw new XPathException("not allowed to have '/' at the beginning of an xpath value");
}
// keep on truckin'
if (firstTokenOfLocationPath) {
throw new XPathException("not allowed to select the root");
}
if (i == tokenCount - 1) {
throw new XPathException("expected step following '/'");
}
firstTokenOfLocationPath=false;
break;
}
default:
firstTokenOfLocationPath=false;
}
}
int size = stepsVector.size();
if (size == 0) {
if (locationPathsVector.size()==0)
throw new XPathException("empty xpath expression");
else
throw new XPathException("xpath cannot end with '|'");
}
Step[] steps = new Step[size];
stepsVector.copyInto(steps);
locationPathsVector.addElement(new LocationPath(steps));
// save location path
fLocationPaths=new LocationPath[locationPathsVector.size()];
locationPathsVector.copyInto(fLocationPaths);
if (DEBUG_XPATH_PARSE) {
System.out.println(">>> "+fLocationPaths);
}
} // parseExpression(SymbolTable,NamespaceContext)
//
// Classes
//
// location path information
/**
* A location path representation for an XPath expression.
*
* @author Andy Clark, IBM
*/
public static class LocationPath
implements Cloneable {
//
// Data
//
/** List of steps. */
public Step[] steps;
//
// Constructors
//
/** Creates a location path from a series of steps. */
public LocationPath(Step[] steps) {
this.steps = steps;
} // <init>(Step[])
/** Copy constructor. */
protected LocationPath(LocationPath path) {
steps = new Step[path.steps.length];
for (int i = 0; i < steps.length; i++) {
steps[i] = (Step)path.steps[i].clone();
}
} // <init>(LocationPath)
//
// Object methods
//
/** Returns a string representation of this object. */
public String toString() {
StringBuffer str = new StringBuffer();
for (int i = 0; i < steps.length; i++) {
if (i > 0 && (steps[i-1].axis.type!=Axis.DESCENDANT
&& steps[i].axis.type!=Axis.DESCENDANT) ){
str.append('/');
}
str.append(steps[i].toString());
}
// DEBUG: This code is just for debugging and should *not*
// be left in because it will mess up hashcodes of
// serialized versions of this object. -Ac
if (false) {
str.append('[');
String s = super.toString();
str.append(s.substring(s.indexOf('@')));
str.append(']');
}
return str.toString();
} // toString():String
/** Returns a clone of this object. */
public Object clone() {
return new LocationPath(this);
} // clone():Object
} // class locationPath
/**
* A location path step comprised of an axis and node test.
*
* @author Andy Clark, IBM
*/
public static class Step
implements Cloneable {
//
// Data
//
/** Axis. */
public Axis axis;
/** Node test. */
public NodeTest nodeTest;
//
// Constructors
//
/** Constructs a step from an axis and node test. */
public Step(Axis axis, NodeTest nodeTest) {
this.axis = axis;
this.nodeTest = nodeTest;
} // <init>(Axis,NodeTest)
/** Copy constructor. */
protected Step(Step step) {
axis = (Axis)step.axis.clone();
nodeTest = (NodeTest)step.nodeTest.clone();
} // <init>(Step)
//
// Object methods
//
/** Returns a string representation of this object. */
public String toString() {
/***
return axis.toString() + "::" + nodeTest.toString();
/***/
if (axis.type == Axis.SELF) {
return ".";
}
if (axis.type == Axis.ATTRIBUTE) {
return "@" + nodeTest.toString();
}
if (axis.type == Axis.CHILD) {
return nodeTest.toString();
}
if (axis.type == Axis.DESCENDANT) {
return "//";
}
return "??? ("+axis.type+')';
/***/
} // toString():String
/** Returns a clone of this object. */
public Object clone() {
return new Step(this);
} // clone():Object
} // class Step
/**
* Axis.
*
* @author Andy Clark, IBM
*/
public static class Axis
implements Cloneable {
//
// Constants
//
/** Type: child. */
public static final short CHILD = 1;
/** Type: attribute. */
public static final short ATTRIBUTE = 2;
/** Type: self. */
public static final short SELF = 3;
/** Type: descendant. */
public static final short DESCENDANT = 4;
//
// Data
//
/** Axis type. */
public short type;
//
// Constructors
//
/** Constructs an axis with the specified type. */
public Axis(short type) {
this.type = type;
} // <init>(short)
/** Copy constructor. */
protected Axis(Axis axis) {
type = axis.type;
} // <init>(Axis)
//
// Object methods
//
/** Returns a string representation of this object. */
public String toString() {
switch (type) {
case CHILD: return "child";
case ATTRIBUTE: return "attribute";
case SELF: return "self";
case DESCENDANT: return "descendant";
}
return "???";
} // toString():String
/** Returns a clone of this object. */
public Object clone() {
return new Axis(this);
} // clone():Object
} // class Axis
/**
* Node test.
*
* @author Andy Clark, IBM
*/
public static class NodeTest
implements Cloneable {
//
// Constants
//
/** Type: qualified name. */
public static final short QNAME = 1;
/** Type: wildcard. */
public static final short WILDCARD = 2;
/** Type: node. */
public static final short NODE = 3;
/** Type: namespace */
public static final short NAMESPACE= 4;
//
// Data
//
/** Node test type. */
public short type;
/** Node qualified name. */
public final QName name = new QName();
//
// Constructors
//
/** Constructs a node test of type WILDCARD or NODE. */
public NodeTest(short type) {
this.type = type;
} // <init>(int)
/** Constructs a node test of type QName. */
public NodeTest(QName name) {
this.type = QNAME;
this.name.setValues(name);
} // <init>(QName)
/** Constructs a node test of type Namespace. */
public NodeTest(String prefix, String uri) {
this.type = NAMESPACE;
this.name.setValues(prefix, null, null, uri);
} // <init>(String,String)
/** Copy constructor. */
public NodeTest(NodeTest nodeTest) {
type = nodeTest.type;
name.setValues(nodeTest.name);
} // <init>(NodeTest)
//
// Object methods
//
/** Returns a string representation of this object. */
public String toString() {
switch (type) {
case QNAME: {
if (name.prefix.length() !=0) {
if (name.uri != null) {
return name.prefix+':'+name.localpart;
}
return "{"+name.uri+'}'+name.prefix+':'+name.localpart;
}
return name.localpart;
}
case NAMESPACE: {
if (name.prefix.length() !=0) {
if (name.uri != null) {
return name.prefix+":*";
}
return "{"+name.uri+'}'+name.prefix+":*";
}
return "???:*";
}
case WILDCARD: {
return "*";
}
case NODE: {
return "node()";
}
}
return "???";
} // toString():String
/** Returns a clone of this object. */
public Object clone() {
return new NodeTest(this);
} // clone():Object
} // class NodeTest
// xpath implementation
// NOTE: The XPath implementation classes are kept internal because
// this implementation is just a temporary hack until a better
// and/or more appropriate implementation can be written.
// keeping the code in separate source files would "muddy" the
// CVS directory when it's not needed. -Ac
/**
* @author Glenn Marcy, IBM
* @author Andy Clark, IBM
*
* @version $Id$
*/
private static final class Tokens {
static final boolean DUMP_TOKENS = false;
/**
* [28] ExprToken ::= '(' | ')' | '[' | ']' | '.' | '..' | '@' | ',' | '::'
* | NameTest | NodeType | Operator | FunctionName
* | AxisName | Literal | Number | VariableReference
*/
public static final int
EXPRTOKEN_OPEN_PAREN = 0,
EXPRTOKEN_CLOSE_PAREN = 1,
EXPRTOKEN_OPEN_BRACKET = 2,
EXPRTOKEN_CLOSE_BRACKET = 3,
EXPRTOKEN_PERIOD = 4,
EXPRTOKEN_DOUBLE_PERIOD = 5,
EXPRTOKEN_ATSIGN = 6,
EXPRTOKEN_COMMA = 7,
EXPRTOKEN_DOUBLE_COLON = 8,
//
// [37] NameTest ::= '*' | NCName ':' '*' | QName
//
// followed by symbol handle of NCName or QName
//
EXPRTOKEN_NAMETEST_ANY = 9,
EXPRTOKEN_NAMETEST_NAMESPACE = 10,
EXPRTOKEN_NAMETEST_QNAME = 11,
//
// [38] NodeType ::= 'comment' | 'text' | 'processing-instruction' | 'node'
//
EXPRTOKEN_NODETYPE_COMMENT = 12,
EXPRTOKEN_NODETYPE_TEXT = 13,
EXPRTOKEN_NODETYPE_PI = 14,
EXPRTOKEN_NODETYPE_NODE = 15,
//
// [32] Operator ::= OperatorName
// | MultiplyOperator
// | '/' | '//' | '|' | '+' | '-' | '=' | '!=' | '<' | '<=' | '>' | '>='
// [33] OperatorName ::= 'and' | 'or' | 'mod' | 'div'
// [34] MultiplyOperator ::= '*'
//
EXPRTOKEN_OPERATOR_AND = 16,
EXPRTOKEN_OPERATOR_OR = 17,
EXPRTOKEN_OPERATOR_MOD = 18,
EXPRTOKEN_OPERATOR_DIV = 19,
EXPRTOKEN_OPERATOR_MULT = 20,
EXPRTOKEN_OPERATOR_SLASH = 21,
EXPRTOKEN_OPERATOR_DOUBLE_SLASH = 22,
EXPRTOKEN_OPERATOR_UNION = 23,
EXPRTOKEN_OPERATOR_PLUS = 24,
EXPRTOKEN_OPERATOR_MINUS = 25,
EXPRTOKEN_OPERATOR_EQUAL = 26,
EXPRTOKEN_OPERATOR_NOT_EQUAL = 27,
EXPRTOKEN_OPERATOR_LESS = 28,
EXPRTOKEN_OPERATOR_LESS_EQUAL = 29,
EXPRTOKEN_OPERATOR_GREATER = 30,
EXPRTOKEN_OPERATOR_GREATER_EQUAL = 31,
//EXPRTOKEN_FIRST_OPERATOR = EXPRTOKEN_OPERATOR_AND,
//EXPRTOKEN_LAST_OPERATOR = EXPRTOKEN_OPERATOR_GREATER_EQUAL,
//
// [35] FunctionName ::= QName - NodeType
//
// followed by symbol handle
//
EXPRTOKEN_FUNCTION_NAME = 32,
//
// [6] AxisName ::= 'ancestor' | 'ancestor-or-self'
// | 'attribute'
// | 'child'
// | 'descendant' | 'descendant-or-self'
// | 'following' | 'following-sibling'
// | 'namespace'
// | 'parent'
// | 'preceding' | 'preceding-sibling'
// | 'self'
//
EXPRTOKEN_AXISNAME_ANCESTOR = 33,
EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF = 34,
EXPRTOKEN_AXISNAME_ATTRIBUTE = 35,
EXPRTOKEN_AXISNAME_CHILD = 36,
EXPRTOKEN_AXISNAME_DESCENDANT = 37,
EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF = 38,
EXPRTOKEN_AXISNAME_FOLLOWING = 39,
EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING = 40,
EXPRTOKEN_AXISNAME_NAMESPACE = 41,
EXPRTOKEN_AXISNAME_PARENT = 42,
EXPRTOKEN_AXISNAME_PRECEDING = 43,
EXPRTOKEN_AXISNAME_PRECEDING_SIBLING = 44,
EXPRTOKEN_AXISNAME_SELF = 45,
//
// [29] Literal ::= '"' [^"]* '"' | "'" [^']* "'"
//
// followed by symbol handle for literal
//
EXPRTOKEN_LITERAL = 46,
//
// [30] Number ::= Digits ('.' Digits?)? | '.' Digits
// [31] Digits ::= [0-9]+
//
// followed by number handle
//
EXPRTOKEN_NUMBER = 47,
//
// [36] VariableReference ::= '$' QName
//
// followed by symbol handle for QName
//
EXPRTOKEN_VARIABLE_REFERENCE = 48;
public static final String[] fgTokenNames = {
"EXPRTOKEN_OPEN_PAREN",
"EXPRTOKEN_CLOSE_PAREN",
"EXPRTOKEN_OPEN_BRACKET",
"EXPRTOKEN_CLOSE_BRACKET",
"EXPRTOKEN_PERIOD",
"EXPRTOKEN_DOUBLE_PERIOD",
"EXPRTOKEN_ATSIGN",
"EXPRTOKEN_COMMA",
"EXPRTOKEN_DOUBLE_COLON",
"EXPRTOKEN_NAMETEST_ANY",
"EXPRTOKEN_NAMETEST_NAMESPACE",
"EXPRTOKEN_NAMETEST_QNAME",
"EXPRTOKEN_NODETYPE_COMMENT",
"EXPRTOKEN_NODETYPE_TEXT",
"EXPRTOKEN_NODETYPE_PI",
"EXPRTOKEN_NODETYPE_NODE",
"EXPRTOKEN_OPERATOR_AND",
"EXPRTOKEN_OPERATOR_OR",
"EXPRTOKEN_OPERATOR_MOD",
"EXPRTOKEN_OPERATOR_DIV",
"EXPRTOKEN_OPERATOR_MULT",
"EXPRTOKEN_OPERATOR_SLASH",
"EXPRTOKEN_OPERATOR_DOUBLE_SLASH",
"EXPRTOKEN_OPERATOR_UNION",
"EXPRTOKEN_OPERATOR_PLUS",
"EXPRTOKEN_OPERATOR_MINUS",
"EXPRTOKEN_OPERATOR_EQUAL",
"EXPRTOKEN_OPERATOR_NOT_EQUAL",
"EXPRTOKEN_OPERATOR_LESS",
"EXPRTOKEN_OPERATOR_LESS_EQUAL",
"EXPRTOKEN_OPERATOR_GREATER",
"EXPRTOKEN_OPERATOR_GREATER_EQUAL",
"EXPRTOKEN_FUNCTION_NAME",
"EXPRTOKEN_AXISNAME_ANCESTOR",
"EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF",
"EXPRTOKEN_AXISNAME_ATTRIBUTE",
"EXPRTOKEN_AXISNAME_CHILD",
"EXPRTOKEN_AXISNAME_DESCENDANT",
"EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF",
"EXPRTOKEN_AXISNAME_FOLLOWING",
"EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING",
"EXPRTOKEN_AXISNAME_NAMESPACE",
"EXPRTOKEN_AXISNAME_PARENT",
"EXPRTOKEN_AXISNAME_PRECEDING",
"EXPRTOKEN_AXISNAME_PRECEDING_SIBLING",
"EXPRTOKEN_AXISNAME_SELF",
"EXPRTOKEN_LITERAL",
"EXPRTOKEN_NUMBER",
"EXPRTOKEN_VARIABLE_REFERENCE"
};
/**
*
*/
private static final int INITIAL_TOKEN_COUNT = 1 << 8;
private int[] fTokens = new int[INITIAL_TOKEN_COUNT];
private int fTokenCount = 0; // for writing
private SymbolTable fSymbolTable;
// REVISIT: Code something better here. -Ac
private java.util.Hashtable fSymbolMapping = new java.util.Hashtable();
// REVISIT: Code something better here. -Ac
private java.util.Hashtable fTokenNames = new java.util.Hashtable();
//
// Constructors
//
public Tokens(SymbolTable symbolTable) {
fSymbolTable = symbolTable;
final String[] symbols = {
"ancestor", "ancestor-or-self", "attribute",
"child", "descendant", "descendant-or-self",
"following", "following-sibling", "namespace",
"parent", "preceding", "preceding-sibling",
"self",
};
for (int i = 0; i < symbols.length; i++) {
fSymbolMapping.put(fSymbolTable.addSymbol(symbols[i]), new Integer(i));
}
fTokenNames.put(new Integer(EXPRTOKEN_OPEN_PAREN), "EXPRTOKEN_OPEN_PAREN");
fTokenNames.put(new Integer(EXPRTOKEN_CLOSE_PAREN), "EXPRTOKEN_CLOSE_PAREN");
fTokenNames.put(new Integer(EXPRTOKEN_OPEN_BRACKET), "EXPRTOKEN_OPEN_BRACKET");
fTokenNames.put(new Integer(EXPRTOKEN_CLOSE_BRACKET), "EXPRTOKEN_CLOSE_BRACKET");
fTokenNames.put(new Integer(EXPRTOKEN_PERIOD), "EXPRTOKEN_PERIOD");
fTokenNames.put(new Integer(EXPRTOKEN_DOUBLE_PERIOD), "EXPRTOKEN_DOUBLE_PERIOD");
fTokenNames.put(new Integer(EXPRTOKEN_ATSIGN), "EXPRTOKEN_ATSIGN");
fTokenNames.put(new Integer(EXPRTOKEN_COMMA), "EXPRTOKEN_COMMA");
fTokenNames.put(new Integer(EXPRTOKEN_DOUBLE_COLON), "EXPRTOKEN_DOUBLE_COLON");
fTokenNames.put(new Integer(EXPRTOKEN_NAMETEST_ANY), "EXPRTOKEN_NAMETEST_ANY");
fTokenNames.put(new Integer(EXPRTOKEN_NAMETEST_NAMESPACE), "EXPRTOKEN_NAMETEST_NAMESPACE");
fTokenNames.put(new Integer(EXPRTOKEN_NAMETEST_QNAME), "EXPRTOKEN_NAMETEST_QNAME");
fTokenNames.put(new Integer(EXPRTOKEN_NODETYPE_COMMENT), "EXPRTOKEN_NODETYPE_COMMENT");
fTokenNames.put(new Integer(EXPRTOKEN_NODETYPE_TEXT), "EXPRTOKEN_NODETYPE_TEXT");
fTokenNames.put(new Integer(EXPRTOKEN_NODETYPE_PI), "EXPRTOKEN_NODETYPE_PI");
fTokenNames.put(new Integer(EXPRTOKEN_NODETYPE_NODE), "EXPRTOKEN_NODETYPE_NODE");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_AND), "EXPRTOKEN_OPERATOR_AND");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_OR), "EXPRTOKEN_OPERATOR_OR");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_MOD), "EXPRTOKEN_OPERATOR_MOD");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_DIV), "EXPRTOKEN_OPERATOR_DIV");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_MULT), "EXPRTOKEN_OPERATOR_MULT");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_SLASH), "EXPRTOKEN_OPERATOR_SLASH");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_DOUBLE_SLASH), "EXPRTOKEN_OPERATOR_DOUBLE_SLASH");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_UNION), "EXPRTOKEN_OPERATOR_UNION");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_PLUS), "EXPRTOKEN_OPERATOR_PLUS");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_MINUS), "EXPRTOKEN_OPERATOR_MINUS");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_EQUAL), "EXPRTOKEN_OPERATOR_EQUAL");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_NOT_EQUAL), "EXPRTOKEN_OPERATOR_NOT_EQUAL");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_LESS), "EXPRTOKEN_OPERATOR_LESS");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_LESS_EQUAL), "EXPRTOKEN_OPERATOR_LESS_EQUAL");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_GREATER), "EXPRTOKEN_OPERATOR_GREATER");
fTokenNames.put(new Integer(EXPRTOKEN_OPERATOR_GREATER_EQUAL), "EXPRTOKEN_OPERATOR_GREATER_EQUAL");
fTokenNames.put(new Integer(EXPRTOKEN_FUNCTION_NAME), "EXPRTOKEN_FUNCTION_NAME");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_ANCESTOR), "EXPRTOKEN_AXISNAME_ANCESTOR");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF), "EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_ATTRIBUTE), "EXPRTOKEN_AXISNAME_ATTRIBUTE");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_CHILD), "EXPRTOKEN_AXISNAME_CHILD");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_DESCENDANT), "EXPRTOKEN_AXISNAME_DESCENDANT");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF), "EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_FOLLOWING), "EXPRTOKEN_AXISNAME_FOLLOWING");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING), "EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_NAMESPACE), "EXPRTOKEN_AXISNAME_NAMESPACE");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_PARENT), "EXPRTOKEN_AXISNAME_PARENT");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_PRECEDING), "EXPRTOKEN_AXISNAME_PRECEDING");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_PRECEDING_SIBLING), "EXPRTOKEN_AXISNAME_PRECEDING_SIBLING");
fTokenNames.put(new Integer(EXPRTOKEN_AXISNAME_SELF), "EXPRTOKEN_AXISNAME_SELF");
fTokenNames.put(new Integer(EXPRTOKEN_LITERAL), "EXPRTOKEN_LITERAL");
fTokenNames.put(new Integer(EXPRTOKEN_NUMBER), "EXPRTOKEN_NUMBER");
fTokenNames.put(new Integer(EXPRTOKEN_VARIABLE_REFERENCE), "EXPRTOKEN_VARIABLE_REFERENCE");
}
//
// Public methods
//
/*** // REVISIT: What is this doing here? -Ac ***
public int addSymbol(byte[] data, int offset, int length, EncodingMap encoding) {
//return fSymbolTable.addSymbol(data, offset, length, encoding);
return fSymbolTable.addSymbol(new String(data, offset, length));
}
/***/
public String getTokenName(int token) {
if (token < 0 || token >= fgTokenNames.length)
return null;
return fgTokenNames[token];
}
public String getTokenString(int token) {
return (String)fTokenNames.get(new Integer(token));
}
public void addToken(String tokenStr) {
Integer tokenInt = (Integer)fTokenNames.get(tokenStr);
if (tokenInt == null) {
tokenInt = new Integer(fTokenNames.size());
fTokenNames.put(tokenInt, tokenStr);
}
addToken(tokenInt.intValue());
}
public void addToken(int token) {
try {
fTokens[fTokenCount] = token;
} catch (ArrayIndexOutOfBoundsException ex) {
int[] oldList = fTokens;
fTokens = new int[fTokenCount << 1];
System.arraycopy(oldList, 0, fTokens, 0, fTokenCount);
fTokens[fTokenCount] = token;
}
fTokenCount++;
}
public int getTokenCount() {
return fTokenCount;
}
public int getToken(int tokenIndex) {
return fTokens[tokenIndex];
}
public void dumpTokens() {
//if (DUMP_TOKENS) {
for (int i = 0; i < fTokenCount; i++) {
switch (fTokens[i]) {
case EXPRTOKEN_OPEN_PAREN:
System.out.print("<OPEN_PAREN/>");
break;
case EXPRTOKEN_CLOSE_PAREN:
System.out.print("<CLOSE_PAREN/>");
break;
case EXPRTOKEN_OPEN_BRACKET:
System.out.print("<OPEN_BRACKET/>");
break;
case EXPRTOKEN_CLOSE_BRACKET:
System.out.print("<CLOSE_BRACKET/>");
break;
case EXPRTOKEN_PERIOD:
System.out.print("<PERIOD/>");
break;
case EXPRTOKEN_DOUBLE_PERIOD:
System.out.print("<DOUBLE_PERIOD/>");
break;
case EXPRTOKEN_ATSIGN:
System.out.print("<ATSIGN/>");
break;
case EXPRTOKEN_COMMA:
System.out.print("<COMMA/>");
break;
case EXPRTOKEN_DOUBLE_COLON:
System.out.print("<DOUBLE_COLON/>");
break;
case EXPRTOKEN_NAMETEST_ANY:
System.out.print("<NAMETEST_ANY/>");
break;
case EXPRTOKEN_NAMETEST_NAMESPACE:
System.out.print("<NAMETEST_NAMESPACE");
System.out.print(" prefix=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print("/>");
break;
case EXPRTOKEN_NAMETEST_QNAME:
System.out.print("<NAMETEST_QNAME");
if (fTokens[++i] != -1)
System.out.print(" prefix=\"" + getTokenString(fTokens[i]) + "\"");
System.out.print(" localpart=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print("/>");
break;
case EXPRTOKEN_NODETYPE_COMMENT:
System.out.print("<NODETYPE_COMMENT/>");
break;
case EXPRTOKEN_NODETYPE_TEXT:
System.out.print("<NODETYPE_TEXT/>");
break;
case EXPRTOKEN_NODETYPE_PI:
System.out.print("<NODETYPE_PI/>");
break;
case EXPRTOKEN_NODETYPE_NODE:
System.out.print("<NODETYPE_NODE/>");
break;
case EXPRTOKEN_OPERATOR_AND:
System.out.print("<OPERATOR_AND/>");
break;
case EXPRTOKEN_OPERATOR_OR:
System.out.print("<OPERATOR_OR/>");
break;
case EXPRTOKEN_OPERATOR_MOD:
System.out.print("<OPERATOR_MOD/>");
break;
case EXPRTOKEN_OPERATOR_DIV:
System.out.print("<OPERATOR_DIV/>");
break;
case EXPRTOKEN_OPERATOR_MULT:
System.out.print("<OPERATOR_MULT/>");
break;
case EXPRTOKEN_OPERATOR_SLASH:
System.out.print("<OPERATOR_SLASH/>");
if (i + 1 < fTokenCount) {
System.out.println();
System.out.print(" ");
}
break;
case EXPRTOKEN_OPERATOR_DOUBLE_SLASH:
System.out.print("<OPERATOR_DOUBLE_SLASH/>");
break;
case EXPRTOKEN_OPERATOR_UNION:
System.out.print("<OPERATOR_UNION/>");
break;
case EXPRTOKEN_OPERATOR_PLUS:
System.out.print("<OPERATOR_PLUS/>");
break;
case EXPRTOKEN_OPERATOR_MINUS:
System.out.print("<OPERATOR_MINUS/>");
break;
case EXPRTOKEN_OPERATOR_EQUAL:
System.out.print("<OPERATOR_EQUAL/>");
break;
case EXPRTOKEN_OPERATOR_NOT_EQUAL:
System.out.print("<OPERATOR_NOT_EQUAL/>");
break;
case EXPRTOKEN_OPERATOR_LESS:
System.out.print("<OPERATOR_LESS/>");
break;
case EXPRTOKEN_OPERATOR_LESS_EQUAL:
System.out.print("<OPERATOR_LESS_EQUAL/>");
break;
case EXPRTOKEN_OPERATOR_GREATER:
System.out.print("<OPERATOR_GREATER/>");
break;
case EXPRTOKEN_OPERATOR_GREATER_EQUAL:
System.out.print("<OPERATOR_GREATER_EQUAL/>");
break;
case EXPRTOKEN_FUNCTION_NAME:
System.out.print("<FUNCTION_NAME");
if (fTokens[++i] != -1)
System.out.print(" prefix=\"" + getTokenString(fTokens[i]) + "\"");
System.out.print(" localpart=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print("/>");
break;
case EXPRTOKEN_AXISNAME_ANCESTOR:
System.out.print("<AXISNAME_ANCESTOR/>");
break;
case EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF:
System.out.print("<AXISNAME_ANCESTOR_OR_SELF/>");
break;
case EXPRTOKEN_AXISNAME_ATTRIBUTE:
System.out.print("<AXISNAME_ATTRIBUTE/>");
break;
case EXPRTOKEN_AXISNAME_CHILD:
System.out.print("<AXISNAME_CHILD/>");
break;
case EXPRTOKEN_AXISNAME_DESCENDANT:
System.out.print("<AXISNAME_DESCENDANT/>");
break;
case EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF:
System.out.print("<AXISNAME_DESCENDANT_OR_SELF/>");
break;
case EXPRTOKEN_AXISNAME_FOLLOWING:
System.out.print("<AXISNAME_FOLLOWING/>");
break;
case EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING:
System.out.print("<AXISNAME_FOLLOWING_SIBLING/>");
break;
case EXPRTOKEN_AXISNAME_NAMESPACE:
System.out.print("<AXISNAME_NAMESPACE/>");
break;
case EXPRTOKEN_AXISNAME_PARENT:
System.out.print("<AXISNAME_PARENT/>");
break;
case EXPRTOKEN_AXISNAME_PRECEDING:
System.out.print("<AXISNAME_PRECEDING/>");
break;
case EXPRTOKEN_AXISNAME_PRECEDING_SIBLING:
System.out.print("<AXISNAME_PRECEDING_SIBLING/>");
break;
case EXPRTOKEN_AXISNAME_SELF:
System.out.print("<AXISNAME_SELF/>");
break;
case EXPRTOKEN_LITERAL:
System.out.print("<LITERAL");
System.out.print(" value=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print("/>");
break;
case EXPRTOKEN_NUMBER:
System.out.print("<NUMBER");
System.out.print(" whole=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print(" part=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print("/>");
break;
case EXPRTOKEN_VARIABLE_REFERENCE:
System.out.print("<VARIABLE_REFERENCE");
if (fTokens[++i] != -1)
System.out.print(" prefix=\"" + getTokenString(fTokens[i]) + "\"");
System.out.print(" localpart=\"" + getTokenString(fTokens[++i]) + "\"");
System.out.print("/>");
break;
default:
System.out.println("<???/>");
}
}
System.out.println();
//}
}
} // class Tokens
/**
* @author Glenn Marcy, IBM
* @author Andy Clark, IBM
*
* @version $Id$
*/
private static class Scanner {
/**
* 7-bit ASCII subset
*
* 0 1 2 3 4 5 6 7 8 9 A B C D E F
* 0, 0, 0, 0, 0, 0, 0, 0, 0, HT, LF, 0, 0, CR, 0, 0, // 0
* 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1
* SP, !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, // 2
* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, :, ;, <, =, >, ?, // 3
* @, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, // 4
* P, Q, R, S, T, U, V, W, X, Y, Z, [, \, ], ^, _, // 5
* `, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, // 6
* p, q, r, s, t, u, v, w, x, y, z, {, |, }, ~, DEL // 7
*/
private static final byte
CHARTYPE_INVALID = 0, // invalid XML character
CHARTYPE_OTHER = 1, // not special - one of "#%&;?\^`{}~" or DEL
CHARTYPE_WHITESPACE = 2, // one of "\t\n\r " (0x09, 0x0A, 0x0D, 0x20)
CHARTYPE_EXCLAMATION = 3, // '!' (0x21)
CHARTYPE_QUOTE = 4, // '\"' or '\'' (0x22 and 0x27)
CHARTYPE_DOLLAR = 5, // '$' (0x24)
CHARTYPE_OPEN_PAREN = 6, // '(' (0x28)
CHARTYPE_CLOSE_PAREN = 7, // ')' (0x29)
CHARTYPE_STAR = 8, // '*' (0x2A)
CHARTYPE_PLUS = 9, // '+' (0x2B)
CHARTYPE_COMMA = 10, // ',' (0x2C)
CHARTYPE_MINUS = 11, // '-' (0x2D)
CHARTYPE_PERIOD = 12, // '.' (0x2E)
CHARTYPE_SLASH = 13, // '/' (0x2F)
CHARTYPE_DIGIT = 14, // '0'-'9' (0x30 to 0x39)
CHARTYPE_COLON = 15, // ':' (0x3A)
CHARTYPE_LESS = 16, // '<' (0x3C)
CHARTYPE_EQUAL = 17, // '=' (0x3D)
CHARTYPE_GREATER = 18, // '>' (0x3E)
CHARTYPE_ATSIGN = 19, // '@' (0x40)
CHARTYPE_LETTER = 20, // 'A'-'Z' or 'a'-'z' (0x41 to 0x5A and 0x61 to 0x7A)
CHARTYPE_OPEN_BRACKET = 21, // '[' (0x5B)
CHARTYPE_CLOSE_BRACKET = 22, // ']' (0x5D)
CHARTYPE_UNDERSCORE = 23, // '_' (0x5F)
CHARTYPE_UNION = 24, // '|' (0x7C)
CHARTYPE_NONASCII = 25; // Non-ASCII Unicode codepoint (>= 0x80)
private static byte[] fASCIICharMap = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 2, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 3, 4, 1, 5, 1, 1, 4, 6, 7, 8, 9, 10, 11, 12, 13,
14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 1, 16, 17, 18, 1,
19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 1, 22, 1, 23,
1, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 24, 1, 1, 1
};
/**
* Symbol literals
*/
/***
private static int fgAndSymbol = -1; // 'and'
private static int fgOrSymbol = -1; // 'or'
private static int fgModSymbol = -1; // 'mod'
private static int fgDivSymbol = -1; // 'div'
private static int fgCommentSymbol = -1; // 'comment'
private static int fgTextSymbol = -1; // 'text'
private static int fgPISymbol = -1; // 'processing-instruction'
private static int fgNodeSymbol = -1; // 'node'
private static int fgAncestorSymbol = -1; // 'ancestor'
private static int fgAncestorOrSelfSymbol = -1; // 'ancestor-or-self'
private static int fgAttributeSymbol = -1; // 'attribute'
private static int fgChildSymbol = -1; // 'child'
private static int fgDescendantSymbol = -1; // 'descendant'
private static int fgDescendantOrSelfSymbol = -1; // 'descendant-or-self'
private static int fgFollowingSymbol = -1; // 'following'
private static int fgFollowingSiblingSymbol = -1; // 'following-sibling'
private static int fgNamespaceSymbol = -1; // 'namespace'
private static int fgParentSymbol = -1; // 'parent'
private static int fgPrecedingSymbol = -1; // 'preceding'
private static int fgPrecedingSiblingSymbol = -1; // 'preceding-sibling'
private static int fgSelfSymbol = -1; // 'self'
private static SymbolTable fgSymbolTable = new SymbolTable();
static {
fgAndSymbol = fgSymbolTable.addSymbol("and");
fgOrSymbol = fgSymbolTable.addSymbol("or");
fgModSymbol = fgSymbolTable.addSymbol("mod");
fgDivSymbol = fgSymbolTable.addSymbol("div");
fgCommentSymbol = fgSymbolTable.addSymbol("comment");
fgTextSymbol = fgSymbolTable.addSymbol("text");
fgPISymbol = fgSymbolTable.addSymbol("processing-instruction");
fgNodeSymbol = fgSymbolTable.addSymbol("node");
fgAncestorSymbol = fgSymbolTable.addSymbol("ancestor");
fgAncestorOrSelfSymbol = fgSymbolTable.addSymbol("ancestor-or-self");
fgAttributeSymbol = fgSymbolTable.addSymbol("attribute");
fgChildSymbol = fgSymbolTable.addSymbol("child");
fgDescendantSymbol = fgSymbolTable.addSymbol("descendant");
fgDescendantOrSelfSymbol = fgSymbolTable.addSymbol("descendant-or-self");
fgFollowingSymbol = fgSymbolTable.addSymbol("following");
fgFollowingSiblingSymbol = fgSymbolTable.addSymbol("following-sibling");
fgNamespaceSymbol = fgSymbolTable.addSymbol("namespace");
fgParentSymbol = fgSymbolTable.addSymbol("parent");
fgPrecedingSymbol = fgSymbolTable.addSymbol("preceding");
fgPrecedingSiblingSymbol = fgSymbolTable.addSymbol("preceding-sibling");
fgSelfSymbol = fgSymbolTable.addSymbol("self");
}
/***/
//
// Data
//
/** Symbol table. */
private SymbolTable fSymbolTable;
// symbols
private String fAndSymbol;
private String fOrSymbol;
private String fModSymbol;
private String fDivSymbol;
private String fCommentSymbol;
private String fTextSymbol;
private String fPISymbol;
private String fNodeSymbol;
private String fAncestorSymbol;
private String fAncestorOrSelfSymbol;
private String fAttributeSymbol;
private String fChildSymbol;
private String fDescendantSymbol;
private String fDescendantOrSelfSymbol;
private String fFollowingSymbol;
private String fFollowingSiblingSymbol;
private String fNamespaceSymbol;
private String fParentSymbol;
private String fPrecedingSymbol;
private String fPrecedingSiblingSymbol;
private String fSelfSymbol;
//
// Constructors
//
/** Constructs an XPath expression scanner. */
public Scanner(SymbolTable symbolTable) {
// save pool and tokens
fSymbolTable = symbolTable;
// create symbols
fAndSymbol = fSymbolTable.addSymbol("and");
fOrSymbol = fSymbolTable.addSymbol("or");
fModSymbol = fSymbolTable.addSymbol("mod");
fDivSymbol = fSymbolTable.addSymbol("div");
fCommentSymbol = fSymbolTable.addSymbol("comment");
fTextSymbol = fSymbolTable.addSymbol("text");
fPISymbol = fSymbolTable.addSymbol("processing-instruction");
fNodeSymbol = fSymbolTable.addSymbol("node");
fAncestorSymbol = fSymbolTable.addSymbol("ancestor");
fAncestorOrSelfSymbol = fSymbolTable.addSymbol("ancestor-or-self");
fAttributeSymbol = fSymbolTable.addSymbol("attribute");
fChildSymbol = fSymbolTable.addSymbol("child");
fDescendantSymbol = fSymbolTable.addSymbol("descendant");
fDescendantOrSelfSymbol = fSymbolTable.addSymbol("descendant-or-self");
fFollowingSymbol = fSymbolTable.addSymbol("following");
fFollowingSiblingSymbol = fSymbolTable.addSymbol("following-sibling");
fNamespaceSymbol = fSymbolTable.addSymbol("namespace");
fParentSymbol = fSymbolTable.addSymbol("parent");
fPrecedingSymbol = fSymbolTable.addSymbol("preceding");
fPrecedingSiblingSymbol = fSymbolTable.addSymbol("preceding-sibling");
fSelfSymbol = fSymbolTable.addSymbol("self");
} // <init>(SymbolTable)
/**
*
*/
public boolean scanExpr(SymbolTable symbolTable,
XPath.Tokens tokens, String data,
int currentOffset, int endOffset)
throws XPathException {
int nameOffset;
String nameHandle, prefixHandle;
boolean starIsMultiplyOperator = false;
int ch;
final String emptySymbol = fSymbolTable.addSymbol("");
/***
if (XPath.Tokens.DUMP_TOKENS) {
System.out.println(" <test>");
System.out.println(" <expression>");
System.out.println(" " + encoding.createString(data, currentOffset, endOffset - currentOffset));
System.out.println(" </expression>");
}
/***/
while (true) {
if (currentOffset == endOffset) {
break;
}
ch = data.charAt(currentOffset);
//
// [39] ExprWhitespace ::= S
//
while (ch == ' ' || ch == 0x0A || ch == 0x09 || ch == 0x0D) {
if (++currentOffset == endOffset) {
break;
}
ch = data.charAt(currentOffset);
}
if (currentOffset == endOffset) {
break;
}
//
// [28] ExprToken ::= '(' | ')' | '[' | ']' | '.' | '..' | '@' | ',' | '::'
// | NameTest | NodeType | Operator | FunctionName
// | AxisName | Literal | Number | VariableReference
//
byte chartype = (ch >= 0x80) ? CHARTYPE_NONASCII : fASCIICharMap[ch];
switch (chartype) {
case CHARTYPE_OPEN_PAREN: // '('
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPEN_PAREN);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_CLOSE_PAREN: // ')'
addToken(tokens, XPath.Tokens.EXPRTOKEN_CLOSE_PAREN);
starIsMultiplyOperator = true;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_OPEN_BRACKET: // '['
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPEN_BRACKET);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_CLOSE_BRACKET: // ']'
addToken(tokens, XPath.Tokens.EXPRTOKEN_CLOSE_BRACKET);
starIsMultiplyOperator = true;
if (++currentOffset == endOffset) {
break;
}
break;
//
// [30] Number ::= Digits ('.' Digits?)? | '.' Digits
// ^^^^^^^^^^
//
case CHARTYPE_PERIOD: // '.', '..' or '.' Digits
if (currentOffset + 1 == endOffset) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_PERIOD);
starIsMultiplyOperator = true;
currentOffset++;
break;
}
ch = data.charAt(currentOffset + 1);
if (ch == '.') { // '..'
addToken(tokens, XPath.Tokens.EXPRTOKEN_DOUBLE_PERIOD);
starIsMultiplyOperator = true;
currentOffset += 2;
} else if (ch >= '0' && ch <= '9') {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NUMBER);
starIsMultiplyOperator = true;
currentOffset = scanNumber(tokens, data, endOffset, currentOffset/*, encoding*/);
} else if (ch == '/') {
addToken(tokens, XPath.Tokens.EXPRTOKEN_PERIOD);
starIsMultiplyOperator = true;
currentOffset++;
} else { // '.'
throw new XPathException ("Invalid character following '.'");
}
if (currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_ATSIGN: // '@'
addToken(tokens, XPath.Tokens.EXPRTOKEN_ATSIGN);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_COMMA: // ','
addToken(tokens, XPath.Tokens.EXPRTOKEN_COMMA);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_COLON: // '::'
if (++currentOffset == endOffset) {
// System.out.println("abort 1a");
return false; // REVISIT
}
ch = data.charAt(currentOffset);
if (ch != ':') {
// System.out.println("abort 1b");
return false; // REVISIT
}
addToken(tokens, XPath.Tokens.EXPRTOKEN_DOUBLE_COLON);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_SLASH: // '/' and '//'
if (++currentOffset == endOffset) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH);
starIsMultiplyOperator = false;
break;
}
ch = data.charAt(currentOffset);
if (ch == '/') { // '//'
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
} else {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH);
starIsMultiplyOperator = false;
}
break;
case CHARTYPE_UNION: // '|'
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_UNION);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_PLUS: // '+'
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_PLUS);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_MINUS: // '-'
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_MINUS);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_EQUAL: // '='
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_EQUAL);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_EXCLAMATION: // '!='
if (++currentOffset == endOffset) {
// System.out.println("abort 2a");
return false; // REVISIT
}
ch = data.charAt(currentOffset);
if (ch != '=') {
// System.out.println("abort 2b");
return false; // REVISIT
}
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_NOT_EQUAL);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
case CHARTYPE_LESS: // '<' and '<='
if (++currentOffset == endOffset) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_LESS);
starIsMultiplyOperator = false;
break;
}
ch = data.charAt(currentOffset);
if (ch == '=') { // '<='
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_LESS_EQUAL);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
} else {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_LESS);
starIsMultiplyOperator = false;
}
break;
case CHARTYPE_GREATER: // '>' and '>='
if (++currentOffset == endOffset) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_GREATER);
starIsMultiplyOperator = false;
break;
}
ch = data.charAt(currentOffset);
if (ch == '=') { // '>='
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_GREATER_EQUAL);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
} else {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_GREATER);
starIsMultiplyOperator = false;
}
break;
//
// [29] Literal ::= '"' [^"]* '"' | "'" [^']* "'"
//
case CHARTYPE_QUOTE: // '\"' or '\''
int qchar = ch;
if (++currentOffset == endOffset) {
// System.out.println("abort 2c");
return false; // REVISIT
}
ch = data.charAt(currentOffset);
int litOffset = currentOffset;
while (ch != qchar) {
if (++currentOffset == endOffset) {
// System.out.println("abort 2d");
return false; // REVISIT
}
ch = data.charAt(currentOffset);
}
int litLength = currentOffset - litOffset;
addToken(tokens, XPath.Tokens.EXPRTOKEN_LITERAL);
starIsMultiplyOperator = true;
tokens.addToken(symbolTable.addSymbol(data.substring(litOffset, litOffset + litLength)));
if (++currentOffset == endOffset) {
break;
}
break;
//
// [30] Number ::= Digits ('.' Digits?)? | '.' Digits
// [31] Digits ::= [0-9]+
//
case CHARTYPE_DIGIT:
addToken(tokens, XPath.Tokens.EXPRTOKEN_NUMBER);
starIsMultiplyOperator = true;
currentOffset = scanNumber(tokens, data, endOffset, currentOffset/*, encoding*/);
break;
//
// [36] VariableReference ::= '$' QName
//
case CHARTYPE_DOLLAR:
if (++currentOffset == endOffset) {
// System.out.println("abort 3a");
return false; // REVISIT
}
nameOffset = currentOffset;
currentOffset = scanNCName(data, endOffset, currentOffset);
if (currentOffset == nameOffset) {
// System.out.println("abort 3b");
return false; // REVISIT
}
if (currentOffset < endOffset) {
ch = data.charAt(currentOffset);
}
else {
ch = -1;
}
nameHandle = symbolTable.addSymbol(data.substring(nameOffset, currentOffset));
if (ch != ':') {
prefixHandle = emptySymbol;
} else {
prefixHandle = nameHandle;
if (++currentOffset == endOffset) {
// System.out.println("abort 4a");
return false; // REVISIT
}
nameOffset = currentOffset;
currentOffset = scanNCName(data, endOffset, currentOffset);
if (currentOffset == nameOffset) {
// System.out.println("abort 4b");
return false; // REVISIT
}
if (currentOffset < endOffset) {
ch = data.charAt(currentOffset);
}
else {
ch = -1;
}
nameHandle = symbolTable.addSymbol(data.substring(nameOffset, currentOffset));
}
addToken(tokens, XPath.Tokens.EXPRTOKEN_VARIABLE_REFERENCE);
starIsMultiplyOperator = true;
tokens.addToken(prefixHandle);
tokens.addToken(nameHandle);
break;
//
// [37] NameTest ::= '*' | NCName ':' '*' | QName
// [34] MultiplyOperator ::= '*'
//
case CHARTYPE_STAR: // '*'
//
// 3.7 Lexical Structure
//
// If there is a preceding token and the preceding token is not one of @, ::, (, [, , or
// an Operator, then a * must be recognized as a MultiplyOperator.
//
// Otherwise, the token must not be recognized as a MultiplyOperator.
//
if (starIsMultiplyOperator) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_MULT);
starIsMultiplyOperator = false;
} else {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NAMETEST_ANY);
starIsMultiplyOperator = true;
}
if (++currentOffset == endOffset) {
break;
}
break;
//
// NCName, QName and non-terminals
//
case CHARTYPE_NONASCII: // possibly a valid non-ascii 'Letter' (BaseChar | Ideographic)
case CHARTYPE_LETTER:
case CHARTYPE_UNDERSCORE:
//
// 3.7 Lexical Structure
//
// If there is a preceding token and the preceding token is not one of @, ::, (, [, , or
// an Operator, then an NCName must be recognized as an OperatorName.
//
// If the character following an NCName (possibly after intervening ExprWhitespace) is (,
// then the token must be recognized as a NodeType or a FunctionName.
//
// If the two characters following an NCName (possibly after intervening ExprWhitespace)
// are ::, then the token must be recognized as an AxisName.
//
// Otherwise, the token must not be recognized as an OperatorName, a NodeType, a
// FunctionName, or an AxisName.
//
// [33] OperatorName ::= 'and' | 'or' | 'mod' | 'div'
// [38] NodeType ::= 'comment' | 'text' | 'processing-instruction' | 'node'
// [35] FunctionName ::= QName - NodeType
// [6] AxisName ::= (see above)
//
// [37] NameTest ::= '*' | NCName ':' '*' | QName
// [5] NCName ::= (Letter | '_') (NCNameChar)*
// [?] NCNameChar ::= Letter | Digit | '.' | '-' | '_' (ascii subset of 'NCNameChar')
// [?] QName ::= (NCName ':')? NCName
// [?] Letter ::= [A-Za-z] (ascii subset of 'Letter')
// [?] Digit ::= [0-9] (ascii subset of 'Digit')
//
nameOffset = currentOffset;
currentOffset = scanNCName(data, endOffset, currentOffset);
if (currentOffset == nameOffset) {
// System.out.println("abort 4c");
return false; // REVISIT
}
if (currentOffset < endOffset) {
ch = data.charAt(currentOffset);
}
else {
ch = -1;
}
nameHandle = symbolTable.addSymbol(data.substring(nameOffset, currentOffset));
boolean isNameTestNCName = false;
boolean isAxisName = false;
prefixHandle = emptySymbol;
if (ch == ':') {
if (++currentOffset == endOffset) {
// System.out.println("abort 5");
return false; // REVISIT
}
ch = data.charAt(currentOffset);
if (ch == '*') {
if (++currentOffset < endOffset) {
ch = data.charAt(currentOffset);
}
isNameTestNCName = true;
} else if (ch == ':') {
if (++currentOffset < endOffset) {
ch = data.charAt(currentOffset);
}
isAxisName = true;
} else {
prefixHandle = nameHandle;
nameOffset = currentOffset;
currentOffset = scanNCName(data, endOffset, currentOffset);
if (currentOffset == nameOffset) {
// System.out.println("abort 5b");
return false; // REVISIT
}
if (currentOffset < endOffset) {
ch = data.charAt(currentOffset);
}
else {
ch = -1;
}
nameHandle = symbolTable.addSymbol(data.substring(nameOffset, currentOffset));
}
}
//
// [39] ExprWhitespace ::= S
//
while (ch == ' ' || ch == 0x0A || ch == 0x09 || ch == 0x0D) {
if (++currentOffset == endOffset) {
break;
}
ch = data.charAt(currentOffset);
}
//
// If there is a preceding token and the preceding token is not one of @, ::, (, [, , or
// an Operator, then an NCName must be recognized as an OperatorName.
//
if (starIsMultiplyOperator) {
if (nameHandle == fAndSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_AND);
starIsMultiplyOperator = false;
} else if (nameHandle == fOrSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_OR);
starIsMultiplyOperator = false;
} else if (nameHandle == fModSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_MOD);
starIsMultiplyOperator = false;
} else if (nameHandle == fDivSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPERATOR_DIV);
starIsMultiplyOperator = false;
} else {
// System.out.println("abort 6");
return false; // REVISIT
}
if (isNameTestNCName) {
// System.out.println("abort 7");
return false; // REVISIT - NCName:* where an OperatorName is required
} else if (isAxisName) {
// System.out.println("abort 8");
return false; // REVISIT - AxisName:: where an OperatorName is required
}
break;
}
//
// If the character following an NCName (possibly after intervening ExprWhitespace) is (,
// then the token must be recognized as a NodeType or a FunctionName.
//
if (ch == '(' && !isNameTestNCName && !isAxisName) {
if (nameHandle == fCommentSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NODETYPE_COMMENT);
} else if (nameHandle == fTextSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NODETYPE_TEXT);
} else if (nameHandle == fPISymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NODETYPE_PI);
} else if (nameHandle == fNodeSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NODETYPE_NODE);
} else {
addToken(tokens, XPath.Tokens.EXPRTOKEN_FUNCTION_NAME);
tokens.addToken(prefixHandle);
tokens.addToken(nameHandle);
}
addToken(tokens, XPath.Tokens.EXPRTOKEN_OPEN_PAREN);
starIsMultiplyOperator = false;
if (++currentOffset == endOffset) {
break;
}
break;
}
//
// If the two characters following an NCName (possibly after intervening ExprWhitespace)
// are ::, then the token must be recognized as an AxisName.
//
if (isAxisName ||
(ch == ':' && currentOffset + 1 < endOffset &&
data.charAt(currentOffset + 1) == ':')) {
if (nameHandle == fAncestorSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_ANCESTOR);
} else if (nameHandle == fAncestorOrSelfSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF);
} else if (nameHandle == fAttributeSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_ATTRIBUTE);
} else if (nameHandle == fChildSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_CHILD);
} else if (nameHandle == fDescendantSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_DESCENDANT);
} else if (nameHandle == fDescendantOrSelfSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF);
} else if (nameHandle == fFollowingSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_FOLLOWING);
} else if (nameHandle == fFollowingSiblingSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING);
} else if (nameHandle == fNamespaceSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_NAMESPACE);
} else if (nameHandle == fParentSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_PARENT);
} else if (nameHandle == fPrecedingSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_PRECEDING);
} else if (nameHandle == fPrecedingSiblingSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_PRECEDING_SIBLING);
} else if (nameHandle == fSelfSymbol) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_AXISNAME_SELF);
} else {
// System.out.println("abort 9");
return false; // REVISIT
}
if (isNameTestNCName) {
// System.out.println("abort 10");
return false; // REVISIT - "NCName:* ::" where "AxisName ::" is required
}
addToken(tokens, XPath.Tokens.EXPRTOKEN_DOUBLE_COLON);
starIsMultiplyOperator = false;
if (!isAxisName) {
currentOffset++;
if (++currentOffset == endOffset) {
break;
}
}
break;
}
//
// Otherwise, the token must not be recognized as an OperatorName, a NodeType, a
// FunctionName, or an AxisName.
//
if (isNameTestNCName) {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE);
starIsMultiplyOperator = true;
tokens.addToken(nameHandle);
} else {
addToken(tokens, XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME);
starIsMultiplyOperator = true;
tokens.addToken(prefixHandle);
tokens.addToken(nameHandle);
}
break;
}
}
if (XPath.Tokens.DUMP_TOKENS) {
tokens.dumpTokens();
}
return true;
}
//
// [5] NCName ::= (Letter | '_') (NCNameChar)*
// [6] NCNameChar ::= Letter | Digit | '.' | '-' | '_' | CombiningChar | Extender
//
int scanNCName(String data, int endOffset, int currentOffset) {
int ch = data.charAt(currentOffset);
if (ch >= 0x80) {
if (!XMLChar.isNameStart(ch))
/*** // REVISIT: Make sure this is a negation. ***
if ((XMLCharacterProperties.fgCharFlags[ch] &
XMLCharacterProperties.E_InitialNameCharFlag) == 0)
/***/
{
return currentOffset;
}
}
else {
byte chartype = fASCIICharMap[ch];
if (chartype != CHARTYPE_LETTER && chartype != CHARTYPE_UNDERSCORE) {
return currentOffset;
}
}
while (++currentOffset < endOffset) {
ch = data.charAt(currentOffset);
if (ch >= 0x80) {
if (!XMLChar.isName(ch))
/*** // REVISIT: Make sure this is a negation. ***
if ((XMLCharacterProperties.fgCharFlags[ch] &
XMLCharacterProperties.E_NameCharFlag) == 0)
/***/
{
break;
}
}
else {
byte chartype = fASCIICharMap[ch];
if (chartype != CHARTYPE_LETTER && chartype != CHARTYPE_DIGIT &&
chartype != CHARTYPE_PERIOD && chartype != CHARTYPE_MINUS &&
chartype != CHARTYPE_UNDERSCORE)
{
break;
}
}
}
return currentOffset;
}
/*
void allocateProducer(byte[] data, int offset, int length, EncodingSupport encoding) {
XPathStringProducer sp = fStringProducers[fStringProducerCount];
if (sp != null) {
sp = sp.setState(data, offset, length, encoding);
} else {
sp = new XPathStringProducer(data, offset, length, encoding);
}
fStringProducers[fStringProducerCount++] = sp;
}
void finalizeProducer(byte[] data) {
fStringProducerCount--;
}
private class XPathStringProducer {
byte[] fData = null;
int fOffset = -1;
int fLength = -1;
String fEncoding = null;
XPathStringProducer(byte[] data, int offset, int length, EncodingSupport encoding) {
init(data, offset, length, encoding);
}
XPathStringProducer setState(byte[] bytes, int offset, int length, EncodingSupport encoding) {
init(bytes, offset, length, encoding);
return this;
}
void init(byte[] data, int offset, int length, EncodingSupport encoding) {
fData = data;
fOffset = offset;
fLength = length;
fEncoding = encoding;
}
String getEncoding() {
return fEncoding;
}
void finalizeProducer() {
// do nothing
}
int addSymbol(int offset, int length) {
return fSymbolTable.addSymbol(fData, offset, length, fEncoding);
}
}
private XPathStringProducer[] fStringProducers = new XPathStringProducer[8];
private int fStringProducerCount = 0;
private XPathStringProducer getStringProducer(byte[] data) {
XPathStringProducer sp = null;
for (int i = 0; i < fStringProducerCount; i++) {
if (fStringProducers[i].fData == data) {
return fStringProducers[i];
}
}
throw new RuntimeException("No StringProducer");
}
*/
//
// [30] Number ::= Digits ('.' Digits?)? | '.' Digits
// [31] Digits ::= [0-9]+
//
private int scanNumber(XPath.Tokens tokens, String/*byte[]*/ data, int endOffset, int currentOffset/*, EncodingSupport encoding*/) {
int ch = data.charAt(currentOffset);
int whole = 0;
int part = 0;
while (ch >= '0' && ch <= '9') {
whole = (whole * 10) + (ch - '0');
if (++currentOffset == endOffset) {
break;
}
ch = data.charAt(currentOffset);
}
if (ch == '.') {
if (++currentOffset < endOffset) {
int start = currentOffset;
ch = data.charAt(currentOffset);
while (ch >= '0' && ch <= '9') {
part = (part * 10) + (ch - '0');
if (++currentOffset == endOffset) {
break;
}
ch = data.charAt(currentOffset);
}
if (part != 0) {
/***
part = tokens.addSymbol(data, start, currentOffset - start, encoding);
/***/
throw new RuntimeException("find a solution!");
//part = fStringPool.addSymbol(data.substring(start, currentOffset));
/***/
}
}
}
tokens.addToken(whole);
tokens.addToken(part);
return currentOffset;
}
/***
public static SymbolTable getGlobalTokens() {
return fgSymbolTable;
}
public static void main(String argv[]) {
try {
SymbolTable symbols = new SymbolTable(XPathExprScanner.getGlobalTokens());
XPath.Tokens tokens = new XPath.Tokens(symbols);
byte[] bytes = new byte[1 << 8]; // 256
int i = 0;
if (XPath.Tokens.DUMP_TOKENS) {
System.out.println("<output>");
System.out.println();
}
while (i < argv.length) {
String uri = argv[i++];
// System.out.println("uri: "+uri);
FileInputStream is = new FileInputStream(uri);
int lineOffset = 0;
int offset = 0;
while (true) {
int avail = bytes.length - offset;
if (avail == 0) {
avail = bytes.length;
byte[] newBytes = new byte[avail << 1];
System.arraycopy(bytes, 0, newBytes, 0, avail);
bytes = newBytes;
}
int result = is.read(bytes, offset, avail);
if (result == -1) {
bytes[offset] = 0;
break;
}
result += offset;
for (int j = offset; j < result; j++) {
int ch = bytes[j];
if (ch == 0x0A || ch == 0x0D) {
if (lineOffset < offset) {
XPathExprScanner.scanExpr(tokens, bytes, lineOffset, offset, UTF8EncodingSupport.getInstance());
}
while (ch == 0x0A || ch == 0x0D) {
if (++j == result) {
j = result;
break;
}
ch = bytes[j];
}
lineOffset = offset;
if (j == result) {
break;
}
}
bytes[offset++] = (byte)ch;
}
}
is.close();
}
if (XPath.Tokens.DUMP_TOKENS) {
System.out.println("</output>");
}
}
catch (Exception e) {
e.printStackTrace();
}
}
/***/
//
// Protected methods
//
/**
* This method adds the specified token to the token list. By
* default, this method allows all tokens. However, subclasses
* of the XPathExprScanner can override this method in order
* to disallow certain tokens from being used in the scanned
* XPath expression. This is a convenient way of allowing only
* a subset of XPath.
*/
protected void addToken(XPath.Tokens tokens, int token)
throws XPathException {
tokens.addToken(token);
} // addToken(int)
} // class Scanner
/**
* @author Glenn Marcy, IBM
* @author Andy Clark, IBM
*
* @version $Id$
*/
/***
public static class XPathExprParser {
//
// Constants
//
private static final boolean DUMP_PARSE_TREE = false;
private static final boolean DEBUG_PUSH_PARSEOPS = false;
/** Parse Tree operations * /
public static final int
PARSEOP_OR = -5000,
PARSEOP_AND = -5001,
PARSEOP_EQUAL = -5002,
PARSEOP_NOT_EQUAL = -5003,
PARSEOP_PLUS = -5004,
PARSEOP_MINUS = -5005,
PARSEOP_MULT = -5006,
PARSEOP_DIV = -5007,
PARSEOP_MOD = -5008,
PARSEOP_LESS = -5009,
PARSEOP_GREATER = -5010,
PARSEOP_LESS_EQUAL = -5011,
PARSEOP_GREATER_EQUAL = -5012,
PARSEOP_NEGATE = -5013,
PARSEOP_UNION = -5014,
PARSEOP_SELECT_ROOT = -5015,
PARSEOP_STEPS = -5016,
PARSEOP_STEP = -5017,
PARSEOP_AXIS_ANCESTOR = -5018,
PARSEOP_AXIS_ANCESTOR_OR_SELF = -5019,
PARSEOP_AXIS_ATTRIBUTE = -5020,
PARSEOP_AXIS_CHILD = -5021,
PARSEOP_AXIS_DESCENDANT = -5022,
PARSEOP_AXIS_DESCENDANT_OR_SELF = -5023,
PARSEOP_AXIS_FOLLOWING = -5024,
PARSEOP_AXIS_FOLLOWING_SIBLING = -5025,
PARSEOP_AXIS_NAMESPACE = -5026,
PARSEOP_AXIS_PARENT = -5027,
PARSEOP_AXIS_PRECEDING = -5028,
PARSEOP_AXIS_PRECEDING_SIBLING = -5029,
PARSEOP_AXIS_SELF = -5030,
PARSEOP_NODETEST_ANY = -5031,
PARSEOP_NODETEST_NAMESPACE = -5032,
PARSEOP_NODETEST_QNAME = -5033,
PARSEOP_NODETEST_COMMENT = -5034,
PARSEOP_NODETEST_TEXT = -5035,
PARSEOP_NODETEST_PI = -5036,
PARSEOP_NODETEST_PI_TARGET = -5037,
PARSEOP_NODETEST_NODE = -5038,
PARSEOP_FILTER = -5039,
PARSEOP_PREDICATES = -5040,
PARSEOP_PREDICATE = -5041,
PARSEOP_VARIABLE_REFERENCE = -5042,
PARSEOP_GROUPING = -5043,
PARSEOP_LITERAL = -5044,
PARSEOP_NUMBER = -5045,
PARSEOP_FUNCTION = -5046,
PARSEOP_FUNCTION_NAME = -5047,
PARSEOP_FUNCTION_ARGUMENTS = -5048;
//
// Data
//
private int fTokenCount = 0; // for reading
private int fCurrentToken = 0; // for reading
private static final int INITIAL_PARSEOP_COUNT = 1 << 8;
private int[] fParseTree = new int[INITIAL_PARSEOP_COUNT];
private int fParseOpCount = 0; // for writing
private int fCurrentParseOp = 0; // for reading
/** Symbol table. * /
private SymbolTable fSymbolTable;
/** Tokens. * /
private XPath.Tokens fTokens;
/** Scanner. * /
private XPathExprScanner fScanner;
//
// Constructors
//
public XPathExprParser() {
this(new SymbolTable());
}
public XPathExprParser(SymbolTable symbolTable) {
this(symbolTable, new XPathExprScanner(symbolTable));
}
public XPathExprParser(SymbolTable symbolTable, XPathExprScanner scanner) {
fSymbolTable = symbolTable;
fScanner = scanner;
} // <init>(SymbolTable,XPathExprScanner)
//
// Public methods
//
// init
public void reset() {
fParseOpCount = 0;
fCurrentParseOp = 0;
}
// parsing
public int parseExpr(String data) throws XPathException {
return parseExpr(data, 0, data.length());
}
public int parseExpr(String data, int currentOffset, int endOffset)
throws XPathException {
return parseExprOrPattern(data, currentOffset, endOffset, false);
}
public int parsePattern(String data, int currentOffset, int endOffset)
throws XPathException {
return parseExprOrPattern(data, currentOffset, endOffset, true);
}
public int parseExprOrPattern(String data, int currentOffset,
int endOffset, boolean isPattern)
throws XPathException {
fTokenCount = 0;
if (DUMP_PARSE_TREE) {
System.out.println(" <test>");
System.out.println(" <expression>");
System.out.println(" " + data.substring(currentOffset, endOffset));
System.out.println(" </expression>");
}
fTokens = new XPath.Tokens(fSymbolTable);
fScanner.scanExpr(fTokens, data, currentOffset, endOffset);
//
// Build parse tree
//
fTokenCount = fTokens.getTokenCount();
fCurrentToken = 0;
if (!parseExpr()) {
// System.out.println("abort 12");
return -1; // REVISIT
}
if (fCurrentToken < fTokenCount) {
// System.out.println("abort 13");
return -1; // REVISIT
}
if (DUMP_PARSE_TREE) {
dumpParseTree(fCurrentParseOp, 4);
}
if (DUMP_PARSE_TREE) {
System.out.println(" </test>");
System.out.println();
}
return fCurrentParseOp;
}
// parse tree ops
public int getCurrentParseOp() {
return fCurrentParseOp;
}
public int getParseTreeOp(int handle) {
return fParseTree[handle];
}
public int getParseTreeSubHandle(int handle, int subHandleIndex) {
return fParseTree[handle - 1 - subHandleIndex];
}
public String getParseTreeSymbol(int handle, int subHandleIndex) {
int symHandle = fParseTree[handle - 1 - subHandleIndex];
return fTokens.getTokenString(symHandle);
}
public int getParseTreeIntValue(int handle, int subHandleIndex) {
return fParseTree[handle - 1 - subHandleIndex];
}
// debugging
public void dumpParseTree(int rootParseOp, int indent) {
indentPrint(indent);
System.out.println("<parse-tree>");
dumpParseTreeNode(rootParseOp, indent + 2);
indentPrint(indent);
System.out.println("</parse-tree>");
}
public String getParseOpName(int parseOp) {
switch (parseOp) {
case PARSEOP_OR: return "PARSEOP_OR";
case PARSEOP_AND: return "PARSEOP_AND";
case PARSEOP_EQUAL: return "PARSEOP_EQUAL";
case PARSEOP_NOT_EQUAL: return "PARSEOP_NOT_EQUAL";
case PARSEOP_PLUS: return "PARSEOP_PLUS";
case PARSEOP_MINUS: return "PARSEOP_MINUS";
case PARSEOP_MULT: return "PARSEOP_MULT";
case PARSEOP_DIV: return "PARSEOP_DIV";
case PARSEOP_MOD: return "PARSEOP_MOD";
case PARSEOP_LESS: return "PARSEOP_LESS";
case PARSEOP_GREATER: return "PARSEOP_GREATER";
case PARSEOP_LESS_EQUAL: return "PARSEOP_LESS_EQUAL";
case PARSEOP_GREATER_EQUAL: return "PARSEOP_GREATER_EQUAL";
case PARSEOP_NEGATE: return "PARSEOP_NEGATE";
case PARSEOP_UNION: return "PARSEOP_UNION";
case PARSEOP_SELECT_ROOT: return "PARSEOP_SELECT_ROOT";
case PARSEOP_STEPS: return "PARSEOP_STEPS";
case PARSEOP_STEP: return "PARSEOP_STEP";
case PARSEOP_AXIS_ANCESTOR: return "PARSEOP_AXIS_ANCESTOR";
case PARSEOP_AXIS_ANCESTOR_OR_SELF: return "PARSEOP_AXIS_ANCESTOR_OR_SELF";
case PARSEOP_AXIS_ATTRIBUTE: return "PARSEOP_AXIS_ATTRIBUTE";
case PARSEOP_AXIS_CHILD: return "PARSEOP_AXIS_CHILD";
case PARSEOP_AXIS_DESCENDANT: return "PARSEOP_AXIS_DESCENDANT";
case PARSEOP_AXIS_DESCENDANT_OR_SELF: return "PARSEOP_AXIS_DESCENDANT_OR_SELF";
case PARSEOP_AXIS_FOLLOWING: return "PARSEOP_AXIS_FOLLOWING";
case PARSEOP_AXIS_FOLLOWING_SIBLING: return "PARSEOP_AXIS_FOLLOWING_SIBLING";
case PARSEOP_AXIS_NAMESPACE: return "PARSEOP_AXIS_NAMESPACE";
case PARSEOP_AXIS_PARENT: return "PARSEOP_AXIS_PARENT";
case PARSEOP_AXIS_PRECEDING: return "PARSEOP_AXIS_PRECEDING";
case PARSEOP_AXIS_PRECEDING_SIBLING: return "PARSEOP_AXIS_PRECEDING_SIBLING";
case PARSEOP_AXIS_SELF: return "PARSEOP_AXIS_SELF";
case PARSEOP_NODETEST_ANY: return "PARSEOP_NODETEST_ANY";
case PARSEOP_NODETEST_NAMESPACE: return "PARSEOP_NODETEST_NAMESPACE";
case PARSEOP_NODETEST_QNAME: return "PARSEOP_NODETEST_QNAME";
case PARSEOP_NODETEST_COMMENT: return "PARSEOP_NODETEST_COMMENT";
case PARSEOP_NODETEST_TEXT: return "PARSEOP_NODETEST_TEXT";
case PARSEOP_NODETEST_PI: return "PARSEOP_NODETEST_PI";
case PARSEOP_NODETEST_PI_TARGET: return "PARSEOP_NODETEST_PI_TARGET";
case PARSEOP_NODETEST_NODE: return "PARSEOP_NODETEST_NODE";
case PARSEOP_FILTER: return "PARSEOP_FILTER";
case PARSEOP_PREDICATES: return "PARSEOP_PREDICATES";
case PARSEOP_PREDICATE: return "PARSEOP_PREDICATE";
case PARSEOP_VARIABLE_REFERENCE: return "PARSEOP_VARIABLE_REFERENCE";
case PARSEOP_GROUPING: return "PARSEOP_GROUPING";
case PARSEOP_LITERAL: return "PARSEOP_LITERAL";
case PARSEOP_NUMBER: return "PARSEOP_NUMBER";
case PARSEOP_FUNCTION: return "PARSEOP_FUNCTION";
case PARSEOP_FUNCTION_NAME: return "PARSEOP_FUNCTION_NAME";
case PARSEOP_FUNCTION_ARGUMENTS: return "PARSEOP_FUNCTION_ARGUMENTS";
}
return "??? ("+parseOp+')';
}
//
// Protected methods
//
protected void checkParseOp(int parseOp) throws XPathException {
// do nothing; all parse ops allowed in the class
}
//
// Private methods
//
private void pushParseOp(int parseOp) throws XPathException {
if (DEBUG_PUSH_PARSEOPS) {
System.out.println("pushParseOp: "+getParseOpName(parseOp));
}
checkParseOp(parseOp);
try {
fParseTree[fParseOpCount] = parseOp;
} catch (ArrayIndexOutOfBoundsException ex) {
int[] oldList = fParseTree;
fParseTree = new int[fParseOpCount << 1];
System.arraycopy(oldList, 0, fParseTree, 0, fParseOpCount);
fParseTree[fParseOpCount] = parseOp;
}
fCurrentParseOp = fParseOpCount++;
}
private void pushParseOp2(int parseOp, int arg) throws XPathException {
if (DEBUG_PUSH_PARSEOPS) {
System.out.println("pushParseOp2: "+getParseOpName(parseOp)+", "+arg);
}
checkParseOp(parseOp);
try {
fParseTree[fParseOpCount + 1] = parseOp;
} catch (ArrayIndexOutOfBoundsException ex) {
int[] oldList = fParseTree;
fParseTree = new int[fParseOpCount << 1];
System.arraycopy(oldList, 0, fParseTree, 0, fParseOpCount);
fParseTree[fParseOpCount + 1] = parseOp;
}
fParseTree[fParseOpCount++] = arg;
fCurrentParseOp = fParseOpCount++;
}
private void pushParseOp3(int parseOp, int arg1, int arg2)
throws XPathException {
if (DEBUG_PUSH_PARSEOPS) {
System.out.println("pushParseOp3: "+getParseOpName(parseOp)+", "+arg1+", "+arg2);
}
checkParseOp(parseOp);
try {
fParseTree[fParseOpCount + 2] = parseOp;
} catch (ArrayIndexOutOfBoundsException ex) {
int[] oldList = fParseTree;
fParseTree = new int[fParseOpCount << 1];
System.arraycopy(oldList, 0, fParseTree, 0, fParseOpCount);
fParseTree[fParseOpCount + 2] = parseOp;
}
fParseTree[fParseOpCount++] = arg2;
fParseTree[fParseOpCount++] = arg1;
fCurrentParseOp = fParseOpCount++;
}
private void indentPrint(int indent) {
for (int i = 0; i < indent; i++) {
System.out.print(" ");
}
}
private void dumpParseTreeNode(int parseOp, int indent) {
switch (fParseTree[parseOp]) {
case PARSEOP_OR:
indentPrint(indent);
System.out.println("<or>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</or>");
break;
case PARSEOP_AND:
indentPrint(indent);
System.out.println("<and>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</and>");
break;
case PARSEOP_EQUAL:
indentPrint(indent);
System.out.println("<equal>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</equal>");
break;
case PARSEOP_NOT_EQUAL:
indentPrint(indent);
System.out.println("<not-equal>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</not-equal>");
break;
case PARSEOP_PLUS:
indentPrint(indent);
System.out.println("<plus>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</plus>");
break;
case PARSEOP_MINUS:
indentPrint(indent);
System.out.println("<minus>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</minus>");
break;
case PARSEOP_MULT:
indentPrint(indent);
System.out.println("<mult>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</mult>");
break;
case PARSEOP_DIV:
indentPrint(indent);
System.out.println("<div>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</div>");
break;
case PARSEOP_MOD:
indentPrint(indent);
System.out.println("<mod>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</mod>");
break;
case PARSEOP_LESS:
indentPrint(indent);
System.out.println("<less>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</less>");
break;
case PARSEOP_GREATER:
indentPrint(indent);
System.out.println("<greater>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</greater>");
break;
case PARSEOP_LESS_EQUAL:
indentPrint(indent);
System.out.println("<less-equal>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</less-equal>");
break;
case PARSEOP_GREATER_EQUAL:
indentPrint(indent);
System.out.println("<greater-equal>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</greater-equal>");
break;
case PARSEOP_NEGATE:
indentPrint(indent);
System.out.println("<negate>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
indentPrint(indent);
System.out.println("</negate>");
break;
case PARSEOP_UNION:
indentPrint(indent);
System.out.println("<union>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</union>");
break;
case PARSEOP_SELECT_ROOT:
indentPrint(indent);
if (fParseTree[parseOp - 1] == -1) {
System.out.println("<select-root/>");
} else {
System.out.println("<select-root>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
indentPrint(indent);
System.out.println("</select-root>");
}
break;
case PARSEOP_STEPS:
indentPrint(indent);
System.out.println("<relative-location-path>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</relative-location-path>");
break;
case PARSEOP_STEP:
indentPrint(indent);
System.out.println("<step>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</step>");
break;
case PARSEOP_AXIS_ANCESTOR:
indentPrint(indent);
System.out.println("<axis name=\"ancestor\"/>");
break;
case PARSEOP_AXIS_ANCESTOR_OR_SELF:
indentPrint(indent);
System.out.println("<axis name=\"ancestor-or-self\"/>");
break;
case PARSEOP_AXIS_ATTRIBUTE:
indentPrint(indent);
System.out.println("<axis name=\"attribute\"/>");
break;
case PARSEOP_AXIS_CHILD:
indentPrint(indent);
System.out.println("<axis name=\"child\"/>");
break;
case PARSEOP_AXIS_DESCENDANT:
indentPrint(indent);
System.out.println("<axis name=\"descendant\"/>");
break;
case PARSEOP_AXIS_DESCENDANT_OR_SELF:
indentPrint(indent);
System.out.println("<axis name=\"descendant-or-self\"/>");
break;
case PARSEOP_AXIS_FOLLOWING:
indentPrint(indent);
System.out.println("<axis name=\"following\"/>");
break;
case PARSEOP_AXIS_FOLLOWING_SIBLING:
indentPrint(indent);
System.out.println("<axis name=\"following-sibling\"/>");
break;
case PARSEOP_AXIS_NAMESPACE:
indentPrint(indent);
System.out.println("<axis name=\"namespace\"/>");
break;
case PARSEOP_AXIS_PARENT:
indentPrint(indent);
System.out.println("<axis name=\"parent\"/>");
break;
case PARSEOP_AXIS_PRECEDING:
indentPrint(indent);
System.out.println("<axis name=\"preceding\"/>");
break;
case PARSEOP_AXIS_PRECEDING_SIBLING:
indentPrint(indent);
System.out.println("<axis name=\"preceding-sibling\"/>");
break;
case PARSEOP_AXIS_SELF:
indentPrint(indent);
System.out.println("<axis name=\"self\"/>");
break;
case PARSEOP_NODETEST_ANY:
indentPrint(indent);
System.out.println("<nodetest type=\"any\"/>");
break;
case PARSEOP_NODETEST_NAMESPACE:
indentPrint(indent);
System.out.print("<nodetest type=\"namespace\"");
System.out.print(" prefix=\"" + fParseTree[parseOp - 1] + "\"");
System.out.println("/>");
break;
case PARSEOP_NODETEST_QNAME:
indentPrint(indent);
System.out.print("<nodetest type=\"qname\"");
if (fParseTree[parseOp - 1] != -1) {
System.out.print(" prefix=\"" + fParseTree[parseOp - 1] + "\"");
}
System.out.print(" localpart=\"" + fParseTree[parseOp - 2] + "\"");
System.out.println("/>");
break;
case PARSEOP_NODETEST_COMMENT:
indentPrint(indent);
System.out.println("<nodetest type=\"comment\"/>");
break;
case PARSEOP_NODETEST_TEXT:
indentPrint(indent);
System.out.println("<nodetest type=\"text\"/>");
break;
case PARSEOP_NODETEST_PI:
indentPrint(indent);
System.out.println("<nodetest type=\"processing-instruction\"/>");
break;
case PARSEOP_NODETEST_PI_TARGET:
indentPrint(indent);
System.out.print("<nodetest type=\"processing-instruction\" target=\"");
System.out.print(fParseTree[parseOp - 1]);
System.out.println("\"/>");
break;
case PARSEOP_NODETEST_NODE:
indentPrint(indent);
System.out.println("<nodetest type=\"node\"/>");
break;
case PARSEOP_FILTER:
indentPrint(indent);
System.out.println("<step-with-predicate>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</step-with-predicate>");
break;
case PARSEOP_PREDICATES:
indentPrint(indent);
System.out.println("<predicates>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</predicates>");
break;
case PARSEOP_PREDICATE:
indentPrint(indent);
System.out.println("<predicate>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
indentPrint(indent);
System.out.println("</predicate>");
break;
case PARSEOP_VARIABLE_REFERENCE:
indentPrint(indent);
System.out.print("<variable-reference");
if (fParseTree[parseOp - 1] != -1) {
System.out.print(" prefix=\"" + fParseTree[parseOp - 1] + "\"");
}
System.out.print(" localpart=\"" + fParseTree[parseOp - 2] + "\"");
System.out.println("/>");
break;
case PARSEOP_GROUPING:
indentPrint(indent);
System.out.println("<grouping>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
indentPrint(indent);
System.out.println("</grouping>");
break;
case PARSEOP_LITERAL:
indentPrint(indent);
System.out.print("<literal");
System.out.print(" value=\"" + fParseTree[parseOp - 1] + "\"");
System.out.println("/>");
break;
case PARSEOP_NUMBER:
indentPrint(indent);
System.out.print("<number");
System.out.print(" whole=\"" + fParseTree[parseOp - 1] + "\"");
System.out.print(" part=\"" + fParseTree[parseOp - 2] + "\"");
System.out.println("/>");
break;
case PARSEOP_FUNCTION:
indentPrint(indent);
System.out.println("<function-call>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
if (fParseTree[parseOp - 2] != -1) {
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
}
indentPrint(indent);
System.out.println("</function-call>");
break;
case PARSEOP_FUNCTION_NAME:
indentPrint(indent);
System.out.print("<function-name");
if (fParseTree[parseOp - 1] != -1) {
System.out.print(" prefix=\"" + fParseTree[parseOp - 1] + "\"");
}
System.out.print(" localpart=\"" + fParseTree[parseOp - 2] + "\"");
System.out.println("/>");
break;
case PARSEOP_FUNCTION_ARGUMENTS:
indentPrint(indent);
System.out.println("<function-args>");
dumpParseTreeNode(fParseTree[parseOp - 1], indent + 2);
dumpParseTreeNode(fParseTree[parseOp - 2], indent + 2);
indentPrint(indent);
System.out.println("</function-args>");
break;
default:
throw new RuntimeException("dumpParseTreeNode("+parseOp+")");
}
}
//
// Package methods
//
/**
* [14] Expr ::= OrExpr
* /
boolean parseExpr() throws XPathException {
return parseOrExpr();
}
/**
* [21] OrExpr ::= AndExpr | OrExpr 'or' AndExpr
*
* also: OrExpr ::= (AndExpr 'or')* AndExpr
* /
boolean parseOrExpr() throws XPathException {
if (!parseAndExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPERATOR_OR) {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseAndExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(PARSEOP_OR, left, right);
}
return true;
}
/**
* [22] AndExpr ::= EqualityExpr | AndExpr 'and' EqualityExpr
* /
boolean parseAndExpr() throws XPathException {
if (!parseEqualityExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPERATOR_AND) {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseEqualityExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(PARSEOP_AND, left, right);
}
return true;
}
/**
* [23] EqualityExpr ::= RelationalExpr
* | EqualityExpr '=' RelationalExpr
* | EqualityExpr '!=' RelationalExpr
* /
boolean parseEqualityExpr() throws XPathException {
if (!parseRelationalExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
int parseOp;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_EQUAL) {
parseOp = PARSEOP_EQUAL;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_NOT_EQUAL) {
parseOp = PARSEOP_NOT_EQUAL;
} else {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseRelationalExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(parseOp, left, right);
}
return true;
}
/**
* [24] RelationalExpr ::= AdditiveExpr
* | RelationalExpr '<' AdditiveExpr
* | RelationalExpr '>' AdditiveExpr
* | RelationalExpr '<=' AdditiveExpr
* | RelationalExpr '>=' AdditiveExpr
* /
boolean parseRelationalExpr() throws XPathException {
if (!parseAdditiveExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
int parseOp;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_LESS) {
parseOp = PARSEOP_LESS;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_GREATER) {
parseOp = PARSEOP_GREATER;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_LESS_EQUAL) {
parseOp = PARSEOP_LESS_EQUAL;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_GREATER_EQUAL) {
parseOp = PARSEOP_GREATER_EQUAL;
} else {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseAdditiveExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(parseOp, left, right);
}
return true;
}
/**
* [25] AdditiveExpr ::= MultiplicativeExpr
* | AdditiveExpr '+' MultiplicativeExpr
* | AdditiveExpr '-' MultiplicativeExpr
* /
boolean parseAdditiveExpr() throws XPathException {
if (!parseMultiplicativeExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
int parseOp;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_PLUS) {
parseOp = PARSEOP_PLUS;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_MINUS) {
parseOp = PARSEOP_MINUS;
} else {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseMultiplicativeExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(parseOp, left, right);
}
return true;
}
/**
* [26] MultiplicativeExpr ::= UnaryExpr
* | MultiplicativeExpr MultiplyOperator UnaryExpr
* | MultiplicativeExpr 'div' UnaryExpr
* | MultiplicativeExpr 'mod' UnaryExpr
* [34] MultiplyOperator ::= '*'
* /
boolean parseMultiplicativeExpr() throws XPathException {
if (!parseUnaryExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
int parseOp;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_MULT) {
parseOp = PARSEOP_MULT;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_DIV) {
parseOp = PARSEOP_DIV;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_MOD) {
parseOp = PARSEOP_MOD;
} else {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseUnaryExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(parseOp, left, right);
}
return true;
}
/**
* [27] UnaryExpr ::= UnionExpr | '-' UnaryExpr
*
* Note: "--UnionExpr" == "-(-UnionExpr)"
* /
boolean parseUnaryExpr() throws XPathException {
if (parseUnionExpr()) {
return true;
}
int saveToken = fCurrentToken;
boolean negate = false;
while (fCurrentToken < fTokenCount) {
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPERATOR_MINUS) {
break;
}
fCurrentToken++;
negate = !negate;
}
if (fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
return false;
}
if (!parseUnionExpr()) {
fCurrentToken = saveToken;
return false;
}
if (negate) {
pushParseOp2(PARSEOP_NEGATE, fCurrentParseOp);
}
return true;
}
/**
* [18] UnionExpr ::= PathExpr | UnionExpr '|' PathExpr
* /
boolean parseUnionExpr() throws XPathException {
if (!parsePathExpr()) {
return false;
}
while (fCurrentToken < fTokenCount) {
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPERATOR_UNION) {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parsePathExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
int right = fCurrentParseOp;
pushParseOp3(PARSEOP_UNION, left, right);
}
return true;
}
/**
* [19] PathExpr ::= RelativeLocationPath
* | '/' RelativeLocationPath?
* | '//' RelativeLocationPath
* | PrimaryExpr Predicate*
* | PrimaryExpr Predicate* '/' RelativeLocationPath
* | PrimaryExpr Predicate* '//' RelativeLocationPath
* /
boolean parsePathExpr() throws XPathException {
if (parseRelativeLocationPath()) {
return true;
} else {
if (fCurrentToken == fTokenCount) {
return false;
}
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH) {
if (++fCurrentToken < fTokenCount && parseRelativeLocationPath()) {
pushParseOp2(PARSEOP_SELECT_ROOT, fCurrentParseOp);
} else {
pushParseOp2(PARSEOP_SELECT_ROOT, -1);
}
return true;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH) {
if (++fCurrentToken == fTokenCount) {
return false; // REVISIT - backup index
}
if (!parseRelativeLocationPath()) {
return false;
}
int left = fCurrentParseOp;
pushParseOp(PARSEOP_AXIS_DESCENDANT_OR_SELF);
int left2 = fCurrentParseOp;
pushParseOp(PARSEOP_NODETEST_NODE);
pushParseOp3(PARSEOP_STEP, left2, fCurrentParseOp);
pushParseOp3(PARSEOP_STEPS, fCurrentParseOp, left);
pushParseOp2(PARSEOP_SELECT_ROOT, fCurrentParseOp);
return true;
}
}
if (!parsePrimaryExpr()) {
return false;
}
int left = fCurrentParseOp;
if (parsePredicates()) {
pushParseOp3(PARSEOP_FILTER, left, fCurrentParseOp);
}
if (fCurrentToken == fTokenCount) {
return true;
}
left = fCurrentParseOp;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH) {
if (++fCurrentToken == fTokenCount) {
return false; // REVISIT
}
if (!parseRelativeLocationPath()) {
return false; // REVISIT
}
pushParseOp3(PARSEOP_STEPS, left, fCurrentParseOp);
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH) {
if (++fCurrentToken == fTokenCount) {
return false;
}
if (!parseRelativeLocationPath()) {
return false;
}
int left2 = fCurrentParseOp;
pushParseOp(PARSEOP_AXIS_DESCENDANT_OR_SELF);
int left3 = fCurrentParseOp;
pushParseOp(PARSEOP_NODETEST_NODE);
pushParseOp3(PARSEOP_STEP, left3, fCurrentParseOp);
pushParseOp3(PARSEOP_STEPS, fCurrentParseOp, left2);
pushParseOp3(PARSEOP_STEPS, left, fCurrentParseOp);
}
return true;
}
/**
* [3] RelativeLocationPath ::= Step
* | RelativeLocationPath '/' Step
* | RelativeLocationPath '//' Step
* /
boolean parseRelativeLocationPath() throws XPathException {
if (!parseStep()) {
return false;
}
while (fCurrentToken < fTokenCount) {
boolean descendantOrSelf;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_SLASH) {
descendantOrSelf = false;
} else if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_OPERATOR_DOUBLE_SLASH) {
descendantOrSelf = true;
} else {
break;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (!parseStep()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return true;
}
if (descendantOrSelf) {
int left2 = fCurrentParseOp;
pushParseOp(PARSEOP_AXIS_DESCENDANT_OR_SELF);
int left3 = fCurrentParseOp;
pushParseOp(PARSEOP_NODETEST_NODE);
pushParseOp3(PARSEOP_STEP, left3, fCurrentParseOp);
pushParseOp3(PARSEOP_STEPS, left, fCurrentParseOp);
pushParseOp3(PARSEOP_STEPS, fCurrentParseOp, left2);
} else {
pushParseOp3(PARSEOP_STEPS, left, fCurrentParseOp);
}
}
return true;
}
/**
* [4] Step ::= (AxisName '::' | '@'?) NodeTest Predicate* | '.' | '..'
* [6] AxisName ::= 'ancestor' | 'ancestor-or-self'
* | 'attribute'
* | 'child'
* | 'descendant' | 'descendant-or-self'
* | 'following' | 'following-sibling'
* | 'namespace'
* | 'parent'
* | 'preceding' | 'preceding-sibling'
* | 'self'
* /
boolean parseStep() throws XPathException {
int parseOp;
int left;
boolean checkDoubleColon = true;
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
if (fCurrentToken == fTokenCount) {
return false;
}
switch (fTokens.getToken(fCurrentToken)) {
case XPath.Tokens.EXPRTOKEN_PERIOD:
fCurrentToken++;
pushParseOp(PARSEOP_AXIS_SELF);
left = fCurrentParseOp;
pushParseOp(PARSEOP_NODETEST_NODE);
pushParseOp3(PARSEOP_STEP, left, fCurrentParseOp);
return true;
case XPath.Tokens.EXPRTOKEN_DOUBLE_PERIOD:
fCurrentToken++;
pushParseOp(PARSEOP_AXIS_PARENT);
left = fCurrentParseOp;
pushParseOp(PARSEOP_NODETEST_NODE);
pushParseOp3(PARSEOP_STEP, left, fCurrentParseOp);
return true;
case XPath.Tokens.EXPRTOKEN_AXISNAME_ANCESTOR:
fCurrentToken++;
parseOp = PARSEOP_AXIS_ANCESTOR;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_ANCESTOR_OR_SELF:
fCurrentToken++;
parseOp = PARSEOP_AXIS_ANCESTOR_OR_SELF;
break;
case XPath.Tokens.EXPRTOKEN_ATSIGN:
checkDoubleColon = false;
// fall through
case XPath.Tokens.EXPRTOKEN_AXISNAME_ATTRIBUTE:
fCurrentToken++;
parseOp = PARSEOP_AXIS_ATTRIBUTE;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_DESCENDANT:
fCurrentToken++;
parseOp = PARSEOP_AXIS_DESCENDANT;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_DESCENDANT_OR_SELF:
fCurrentToken++;
parseOp = PARSEOP_AXIS_DESCENDANT_OR_SELF;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_FOLLOWING:
fCurrentToken++;
parseOp = PARSEOP_AXIS_FOLLOWING;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_FOLLOWING_SIBLING:
fCurrentToken++;
parseOp = PARSEOP_AXIS_FOLLOWING_SIBLING;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_NAMESPACE:
fCurrentToken++;
parseOp = PARSEOP_AXIS_NAMESPACE;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_PARENT:
fCurrentToken++;
parseOp = PARSEOP_AXIS_PARENT;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_PRECEDING:
fCurrentToken++;
parseOp = PARSEOP_AXIS_PRECEDING;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_PRECEDING_SIBLING:
fCurrentToken++;
parseOp = PARSEOP_AXIS_PRECEDING_SIBLING;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_SELF:
fCurrentToken++;
parseOp = PARSEOP_AXIS_SELF;
break;
case XPath.Tokens.EXPRTOKEN_AXISNAME_CHILD:
fCurrentToken++;
parseOp = PARSEOP_AXIS_CHILD;
break;
default:
checkDoubleColon = false;
parseOp = PARSEOP_AXIS_CHILD;
break;
}
pushParseOp(parseOp);
left = fCurrentParseOp;
if (checkDoubleColon) {
if (fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_DOUBLE_COLON) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
fCurrentToken++;
}
if (fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (!parseNodeTest()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
pushParseOp3(PARSEOP_STEP, left, fCurrentParseOp);
left = fCurrentParseOp;
if (parsePredicates()) {
pushParseOp3(PARSEOP_FILTER, left, fCurrentParseOp);
}
return true;
}
/**
* [7] NodeTest ::= '*'
* | NCName ':' '*'
* | QName
* | 'comment' '(' ')'
* | 'text' '(' ')'
* | 'processing-instruction' '(' Literal? ')'
* | 'node' '(' ')'
* [29] Literal ::= '"' [^"]* '"' | "'" [^']* "'"
* /
boolean parseNodeTest() throws XPathException {
int parseOp;
int prefix;
int name;
if (fCurrentToken == fTokenCount) {
return false;
}
switch (fTokens.getToken(fCurrentToken)) {
case XPath.Tokens.EXPRTOKEN_NAMETEST_ANY:
fCurrentToken++;
pushParseOp(PARSEOP_NODETEST_ANY);
return true;
case XPath.Tokens.EXPRTOKEN_NAMETEST_NAMESPACE:
prefix = fTokens.getToken(++fCurrentToken);
fCurrentToken++;
pushParseOp2(PARSEOP_NODETEST_NAMESPACE, prefix);
return true;
case XPath.Tokens.EXPRTOKEN_NAMETEST_QNAME:
prefix = fTokens.getToken(++fCurrentToken);
name = fTokens.getToken(++fCurrentToken);
fCurrentToken++;
pushParseOp3(PARSEOP_NODETEST_QNAME, prefix, name);
return true;
case XPath.Tokens.EXPRTOKEN_NODETYPE_COMMENT:
parseOp = PARSEOP_NODETEST_COMMENT;
break;
case XPath.Tokens.EXPRTOKEN_NODETYPE_TEXT:
parseOp = PARSEOP_NODETEST_TEXT;
break;
case XPath.Tokens.EXPRTOKEN_NODETYPE_PI:
parseOp = PARSEOP_NODETEST_PI;
break;
case XPath.Tokens.EXPRTOKEN_NODETYPE_NODE:
parseOp = PARSEOP_NODETEST_NODE;
break;
default:
return false;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
int left = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPEN_PAREN) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (parseOp == PARSEOP_NODETEST_PI && fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_LITERAL) {
int target = fTokens.getToken(++fCurrentToken);
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_CLOSE_PAREN) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
fCurrentToken++;
pushParseOp2(PARSEOP_NODETEST_PI_TARGET, target);
} else {
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_CLOSE_PAREN) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
fCurrentToken++;
pushParseOp(parseOp);
}
return true;
}
/**
* [8] Predicate ::= '[' PredicateExpr ']'
* [9] PredicateExpr ::= Expr
* [4] Step ::= AxisSpecifier NodeTest Predicate* | AbbreviatedStep
* [20] FilterExpr ::= PrimaryExpr Predicate*
* /
boolean parsePredicates() throws XPathException {
int left = -1;
boolean found = false;
while (true) {
if (fCurrentToken == fTokenCount || fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPEN_BRACKET) {
return found;
}
int saveToken = fCurrentToken;
int saveParseOp = fCurrentParseOp;
if (++fCurrentToken == fTokenCount || !parseExpr() ||
fCurrentToken == fTokenCount || fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_CLOSE_BRACKET) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return found;
}
fCurrentToken++;
found = true;
pushParseOp2(PARSEOP_PREDICATE, fCurrentParseOp);
if (left != -1) {
pushParseOp3(PARSEOP_PREDICATES, left, fCurrentParseOp);
}
left = fCurrentParseOp;
}
}
/**
* [15] PrimaryExpr ::= '$' QName
* | '(' Expr ')'
* | '"' [^"]* '"' | "'" [^']* "'"
* | ([0-9]+) ('.' ([0-9]+)?)? | '.' Digits
* | (QName - NodeType) '(' ( Expr ( ',' Expr )* )? ')'
* /
boolean parsePrimaryExpr() throws XPathException {
int prefix;
int handle;
int saveToken;
int saveParseOp;
if (fCurrentToken == fTokenCount) {
return false;
}
switch (fTokens.getToken(fCurrentToken)) {
case XPath.Tokens.EXPRTOKEN_VARIABLE_REFERENCE:
prefix = fTokens.getToken(++fCurrentToken);
handle = fTokens.getToken(++fCurrentToken); // localpart
fCurrentToken++;
pushParseOp3(PARSEOP_VARIABLE_REFERENCE, prefix, handle);
break;
case XPath.Tokens.EXPRTOKEN_OPEN_PAREN:
saveToken = fCurrentToken;
saveParseOp = fCurrentParseOp;
if (++fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (!parseExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (fCurrentToken == fTokenCount) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_CLOSE_PAREN) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
fCurrentToken++;
pushParseOp2(PARSEOP_GROUPING, fCurrentParseOp);
break;
case XPath.Tokens.EXPRTOKEN_LITERAL:
handle = fTokens.getToken(++fCurrentToken);
fCurrentToken++;
pushParseOp2(PARSEOP_LITERAL, handle);
break;
case XPath.Tokens.EXPRTOKEN_NUMBER:
int whole = fTokens.getToken(++fCurrentToken);
int part = fTokens.getToken(++fCurrentToken);
fCurrentToken++;
pushParseOp3(PARSEOP_NUMBER, whole, part);
break;
case XPath.Tokens.EXPRTOKEN_FUNCTION_NAME:
saveToken = fCurrentToken;
saveParseOp = fCurrentParseOp;
prefix = fTokens.getToken(++fCurrentToken);
handle = fTokens.getToken(++fCurrentToken); // localpart
fCurrentToken++;
pushParseOp3(PARSEOP_FUNCTION_NAME, prefix, handle);
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_OPEN_PAREN) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
fCurrentToken++;
int funcName = fCurrentParseOp;
int nextArg = -1;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_CLOSE_PAREN) {
fCurrentToken++;
} else {
while (true) {
if (!parseExpr()) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
if (nextArg != -1) {
pushParseOp3(PARSEOP_FUNCTION_ARGUMENTS, nextArg, fCurrentParseOp);
}
nextArg = fCurrentParseOp;
if (fTokens.getToken(fCurrentToken) == XPath.Tokens.EXPRTOKEN_CLOSE_PAREN) {
fCurrentToken++;
break;
}
if (fTokens.getToken(fCurrentToken) != XPath.Tokens.EXPRTOKEN_COMMA) {
fCurrentToken = saveToken;
fCurrentParseOp = saveParseOp;
return false;
}
fCurrentToken++;
}
}
pushParseOp3(PARSEOP_FUNCTION, funcName, nextArg);
break;
default:
return false;
}
return true;
}
//
// MAIN
//
public static void main(String argv[]) {
for (int i = 0; i < argv.length; i++) {
String expression = argv[i];
System.out.println("# XPath expression: "+expression);
XPathExprParser parser = new XPathExprParser();
try {
parser.parseExpr(expression);
}
catch (Exception e) {
e.printStackTrace();
}
}
}
} // class XPathExprParser
/***/
//
// MAIN
//
/** Main program entry. */
public static void main(String[] argv) throws Exception {
for (int i = 0; i < argv.length; i++) {
final String expression = argv[i];
System.out.println("# XPath expression: \""+expression+'"');
try {
SymbolTable symbolTable = new SymbolTable();
XPath xpath = new XPath(expression, symbolTable, null);
System.out.println("expanded xpath: \""+xpath.toString()+'"');
}
catch (XPathException e) {
System.out.println("error: "+e.getMessage());
}
}
} // main(String[])
} // class XPath