| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 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 "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * 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) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Vector; |
| import java.util.Hashtable; |
| import java.util.Enumeration; |
| import java.util.StringTokenizer; |
| |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class SymbolTable { |
| |
| // These hashtables are used for all stylesheets |
| private final Hashtable _stylesheets = new Hashtable(); |
| private final Hashtable _primops = new Hashtable(); |
| |
| // These hashtables are used for some stylesheets |
| private Hashtable _variables = null; |
| private Hashtable _templates = null; |
| private Hashtable _attributeSets = null; |
| private Hashtable _aliases = null; |
| private Hashtable _excludedURI = null; |
| private Hashtable _decimalFormats = null; |
| |
| public DecimalFormatting getDecimalFormatting(QName name) { |
| if (_decimalFormats == null) return null; |
| return((DecimalFormatting)_decimalFormats.get(name)); |
| } |
| |
| public void addDecimalFormatting(QName name, DecimalFormatting symbols) { |
| if (_decimalFormats == null) _decimalFormats = new Hashtable(); |
| _decimalFormats.put(name, symbols); |
| } |
| |
| public Stylesheet addStylesheet(QName name, Stylesheet node) { |
| return (Stylesheet)_stylesheets.put(name, node); |
| } |
| |
| public Stylesheet lookupStylesheet(QName name) { |
| return (Stylesheet)_stylesheets.get(name); |
| } |
| |
| public Template addTemplate(Template template) { |
| final QName name = template.getName(); |
| if (_templates == null) _templates = new Hashtable(); |
| return (Template)_templates.put(name, template); |
| } |
| |
| public Template lookupTemplate(QName name) { |
| if (_templates == null) return null; |
| return (Template)_templates.get(name); |
| } |
| |
| public Variable addVariable(Variable variable) { |
| if (_variables == null) _variables = new Hashtable(); |
| final String name = variable.getName().getStringRep(); |
| return (Variable)_variables.put(name, variable); |
| } |
| |
| public Param addParam(Param parameter) { |
| if (_variables == null) _variables = new Hashtable(); |
| final String name = parameter.getName().getStringRep(); |
| return (Param)_variables.put(name, parameter); |
| } |
| |
| public Variable lookupVariable(QName qname) { |
| if (_variables == null) return null; |
| final String name = qname.getStringRep(); |
| final Object obj = _variables.get(name); |
| return obj instanceof Variable ? (Variable)obj : null; |
| } |
| |
| public Param lookupParam(QName qname) { |
| if (_variables == null) return null; |
| final String name = qname.getStringRep(); |
| final Object obj = _variables.get(name); |
| return obj instanceof Param ? (Param)obj : null; |
| } |
| |
| public SyntaxTreeNode lookupName(QName qname) { |
| if (_variables == null) return null; |
| final String name = qname.getStringRep(); |
| return (SyntaxTreeNode)_variables.get(name); |
| } |
| |
| public AttributeSet addAttributeSet(AttributeSet atts) { |
| if (_attributeSets == null) _attributeSets = new Hashtable(); |
| return (AttributeSet)_attributeSets.put(atts.getName(), atts); |
| } |
| |
| public AttributeSet lookupAttributeSet(QName name) { |
| if (_attributeSets == null) return null; |
| return (AttributeSet)_attributeSets.get(name); |
| } |
| |
| /** |
| * Add a primitive operator or function to the symbol table. To avoid |
| * name clashes with user-defined names, the prefix <tt>PrimopPrefix</tt> |
| * is prepended. |
| */ |
| public void addPrimop(String name, MethodType mtype) { |
| Vector methods = (Vector)_primops.get(name); |
| if (methods == null) { |
| _primops.put(name, methods = new Vector()); |
| } |
| methods.addElement(mtype); |
| } |
| |
| /** |
| * Lookup a primitive operator or function in the symbol table by |
| * prepending the prefix <tt>PrimopPrefix</tt>. |
| */ |
| public Vector lookupPrimop(String name) { |
| return (Vector)_primops.get(name); |
| } |
| |
| /** |
| * This is used for xsl:attribute elements that have a "namespace" |
| * attribute that is currently not defined using xmlns: |
| */ |
| private int _nsCounter = 0; |
| |
| public String generateNamespacePrefix() { |
| return(new String("ns"+(_nsCounter++))); |
| } |
| |
| /** |
| * Use a namespace prefix to lookup a namespace URI |
| */ |
| private SyntaxTreeNode _current = null; |
| |
| public void setCurrentNode(SyntaxTreeNode node) { |
| _current = node; |
| } |
| |
| public String lookupNamespace(String prefix) { |
| if (_current == null) return(Constants.EMPTYSTRING); |
| return(_current.lookupNamespace(prefix)); |
| } |
| |
| /** |
| * Adds an alias for a namespace prefix |
| */ |
| public void addPrefixAlias(String prefix, String alias) { |
| if (_aliases == null) _aliases = new Hashtable(); |
| _aliases.put(prefix,alias); |
| } |
| |
| /** |
| * Retrieves any alias for a given namespace prefix |
| */ |
| public String lookupPrefixAlias(String prefix) { |
| if (_aliases == null) return null; |
| return (String)_aliases.get(prefix); |
| } |
| |
| /** |
| * Register a namespace URI so that it will not be declared in the output |
| * unless it is actually referenced in the output. |
| */ |
| public void excludeURI(String uri) { |
| // The null-namespace cannot be excluded |
| if (uri == null) return; |
| |
| // Create new hashtable of exlcuded URIs if none exists |
| if (_excludedURI == null) _excludedURI = new Hashtable(); |
| |
| // Register the namespace URI |
| Integer refcnt = (Integer)_excludedURI.get(uri); |
| if (refcnt == null) |
| refcnt = new Integer(1); |
| else |
| refcnt = new Integer(refcnt.intValue() + 1); |
| _excludedURI.put(uri,refcnt); |
| } |
| |
| /** |
| * Exclude a series of namespaces given by a list of whitespace |
| * separated namespace prefixes. |
| */ |
| public void excludeNamespaces(String prefixes) { |
| if (prefixes != null) { |
| StringTokenizer tokens = new StringTokenizer(prefixes); |
| while (tokens.hasMoreTokens()) { |
| final String prefix = tokens.nextToken(); |
| final String uri; |
| if (prefix.equals("#default")) |
| uri = lookupNamespace(Constants.EMPTYSTRING); |
| else |
| uri = lookupNamespace(prefix); |
| if (uri != null) excludeURI(uri); |
| } |
| } |
| } |
| |
| /** |
| * Check if a namespace should not be declared in the output (unless used) |
| */ |
| public boolean isExcludedNamespace(String uri) { |
| if (uri != null && _excludedURI != null) { |
| final Integer refcnt = (Integer)_excludedURI.get(uri); |
| return (refcnt != null && refcnt.intValue() > 0); |
| } |
| return false; |
| } |
| |
| /** |
| * Turn of namespace declaration exclusion |
| */ |
| public void unExcludeNamespaces(String prefixes) { |
| if (_excludedURI == null) return; |
| if (prefixes != null) { |
| StringTokenizer tokens = new StringTokenizer(prefixes); |
| while (tokens.hasMoreTokens()) { |
| final String prefix = tokens.nextToken(); |
| final String uri; |
| if (prefix.equals("#default")) |
| uri = lookupNamespace(Constants.EMPTYSTRING); |
| else |
| uri = lookupNamespace(prefix); |
| Integer refcnt = (Integer)_excludedURI.get(uri); |
| if (refcnt != null) |
| _excludedURI.put(uri, new Integer(refcnt.intValue() - 1)); |
| } |
| } |
| } |
| |
| } |
| |