| /* |
| * 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 "Xerces" 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) 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.xs.identity; |
| |
| import org.apache.xerces.impl.xs.SchemaGrammar; |
| import org.apache.xerces.impl.xpath.*; |
| import org.apache.xerces.xni.NamespaceContext; |
| import org.apache.xerces.xni.QName; |
| import org.apache.xerces.xni.XNIException; |
| import org.apache.xerces.xni.XMLAttributes; |
| import org.apache.xerces.util.SymbolTable; |
| import org.apache.xerces.impl.xs.XSElementDecl; |
| import org.apache.xerces.impl.xs.XSAttributeGroupDecl; |
| |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Schema identity constraint selector. |
| * |
| * @author Andy Clark, IBM |
| * @version $Id$ |
| */ |
| public class Selector { |
| |
| // |
| // Data |
| // |
| |
| /** XPath. */ |
| protected Selector.XPath fXPath; |
| |
| /** Identity constraint. */ |
| protected IdentityConstraint fIdentityConstraint; |
| |
| // |
| // Constructors |
| // |
| |
| /** Constructs a selector. */ |
| public Selector(Selector.XPath xpath, |
| IdentityConstraint identityConstraint) { |
| fXPath = xpath; |
| fIdentityConstraint = identityConstraint; |
| } // <init>(Selector.XPath,IdentityConstraint) |
| |
| // |
| // Public methods |
| // |
| |
| /** Returns the selector XPath. */ |
| public org.apache.xerces.impl.xpath.XPath getXPath() { |
| return fXPath; |
| } // getXPath():org.apache.xerces.v1.schema.identity.XPath |
| |
| /** Returns the identity constraint. */ |
| public IdentityConstraint getIdentityConstraint() { |
| return fIdentityConstraint; |
| } // getIdentityConstraint():IdentityConstraint |
| |
| // factory method |
| |
| /** Creates a selector matcher. */ |
| public XPathMatcher createMatcher(FieldActivator activator) { |
| return new Selector.Matcher(fXPath, activator); |
| } // createMatcher(FieldActivator):XPathMatcher |
| |
| // |
| // Object methods |
| // |
| |
| /** Returns a string representation of this object. */ |
| public String toString() { |
| return fXPath.toString(); |
| } // toString():String |
| |
| // |
| // Classes |
| // |
| |
| /** |
| * Schema identity constraint selector XPath expression. |
| * |
| * @author Andy Clark, IBM |
| * @version $Id$ |
| */ |
| public static class XPath |
| extends org.apache.xerces.impl.xpath.XPath { |
| |
| // |
| // Constructors |
| // |
| |
| /** Constructs a selector XPath expression. */ |
| public XPath(String xpath, SymbolTable symbolTable, |
| NamespaceContext context) throws XPathException { |
| // NOTE: We have to prefix the selector XPath with "./" in |
| // order to handle selectors such as "." that select |
| // the element container because the fields could be |
| // relative to that element. -Ac |
| // Unless xpath starts with a descendant node -Achille Fokoue |
| // ... or a '.' or a '/' - NG |
| super(((xpath.trim().startsWith("/") ||xpath.trim().startsWith("."))? |
| xpath:"./"+xpath), symbolTable, context); |
| |
| // verify that an attribute is not selected |
| for (int i=0;i<fLocationPaths.length;i++) { |
| org.apache.xerces.impl.xpath.XPath.Axis axis = |
| fLocationPaths[i].steps[fLocationPaths[i].steps.length-1].axis; |
| if (axis.type == axis.ATTRIBUTE) { |
| throw new XPathException("selectors cannot select attributes"); |
| } |
| } |
| |
| } // <init>(String,SymbolTable,NamespacesScope) |
| |
| } // class Selector.XPath |
| |
| /** |
| * Selector matcher. |
| * |
| * @author Andy Clark, IBM |
| */ |
| protected class Matcher |
| extends XPathMatcher { |
| |
| // |
| // Data |
| // |
| |
| /** Field activator. */ |
| protected FieldActivator fFieldActivator; |
| |
| /** Element depth. */ |
| protected int fElementDepth; |
| |
| /** Depth at match. */ |
| protected int fMatchedDepth; |
| |
| // |
| // Constructors |
| // |
| |
| /** Constructs a selector matcher. */ |
| public Matcher(Selector.XPath xpath, FieldActivator activator) { |
| super(xpath, false, Selector.this.fIdentityConstraint); |
| fFieldActivator = activator; |
| } // <init>(Selector.XPath,FieldActivator) |
| |
| // |
| // XMLDocumentFragmentHandler methods |
| // |
| |
| public void startDocumentFragment(SymbolTable symbolTable) |
| throws XNIException { |
| super.startDocumentFragment(symbolTable); |
| //super.startDocumentFragment(context, symbolTable); |
| fElementDepth = 0; |
| fMatchedDepth = -1; |
| } // startDocumentFragment(SymbolTable) |
| |
| /** |
| * The start of an element. If the document specifies the start element |
| * by using an empty tag, then the startElement method will immediately |
| * be followed by the endElement method, with no intervening methods. |
| * |
| * @param element The name of the element. |
| * @param attributes The element attributes. |
| * @param elementDecl: The element declaration |
| * |
| * @throws SAXException Thrown by handler to signal an error. |
| */ |
| public void startElement(QName element, XMLAttributes attributes, |
| XSElementDecl elementDecl) throws XNIException { |
| super.startElement(element, attributes, elementDecl); |
| fElementDepth++; |
| |
| // activate the fields, if selector is matched |
| if (fMatchedDepth == -1 && isMatched()) { |
| fMatchedDepth = fElementDepth; |
| fFieldActivator.startValueScopeFor(fIdentityConstraint); |
| int count = fIdentityConstraint.getFieldCount(); |
| for (int i = 0; i < count; i++) { |
| Field field = fIdentityConstraint.getFieldAt(i); |
| XPathMatcher matcher = fFieldActivator.activateField(field); |
| matcher.startElement(element, attributes, elementDecl); |
| } |
| } |
| |
| } // startElement(QName,XMLAttrList,int) |
| |
| public void endElement(QName element, XSElementDecl eDecl) { |
| super.endElement(element, eDecl); |
| if (fElementDepth-- == fMatchedDepth) { |
| fMatchedDepth = -1; |
| fFieldActivator.endValueScopeFor(fIdentityConstraint); |
| } |
| } |
| |
| } // class Matcher |
| |
| } // class Selector |
