| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2003 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) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xalan.transformer; |
| |
| import java.util.Vector; |
| |
| import javax.xml.transform.TransformerException; |
| |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.templates.KeyDeclaration; |
| import org.apache.xml.dtm.Axis; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xml.utils.QName; |
| import org.apache.xpath.XPath; |
| import org.apache.xpath.axes.OneStepIteratorForward; |
| |
| /** |
| * This class implements an optimized iterator for |
| * "key()" patterns, matching each node to the |
| * match attribute in one or more xsl:key declarations. |
| * @xsl.usage internal |
| */ |
| public class KeyIterator extends OneStepIteratorForward |
| { |
| |
| /** Key name. |
| * @serial */ |
| private QName m_name; |
| |
| /** |
| * Get the key name from a key declaration this iterator will process |
| * |
| * |
| * @return Key name |
| */ |
| public QName getName() |
| { |
| return m_name; |
| } |
| |
| /** Vector of Key declarations in the stylesheet. |
| * @serial */ |
| private Vector m_keyDeclarations; |
| |
| /** |
| * Get the key declarations from the stylesheet |
| * |
| * |
| * @return Vector containing the key declarations from the stylesheet |
| */ |
| public Vector getKeyDeclarations() |
| { |
| return m_keyDeclarations; |
| } |
| |
| /** |
| * Create a KeyIterator object. |
| * |
| * @param compiler A reference to the Compiler that contains the op map. |
| * @param opPos The position within the op map, which contains the |
| * location path expression for this itterator. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| KeyIterator(QName name, Vector keyDeclarations) |
| { |
| super(Axis.ALL); |
| m_keyDeclarations = keyDeclarations; |
| // m_prefixResolver = nscontext; |
| m_name = name; |
| } |
| |
| /** |
| * Test whether a specified node is visible in the logical view of a |
| * TreeWalker or NodeIterator. This function will be called by the |
| * implementation of TreeWalker and NodeIterator; it is not intended to |
| * be called directly from user code. |
| * |
| * @param testnode The node to check to see if it passes the filter or not. |
| * |
| * @return a constant to determine whether the node is accepted, |
| * rejected, or skipped, as defined above . |
| */ |
| public short acceptNode(int testNode) |
| { |
| boolean foundKey = false; |
| KeyIterator ki = (KeyIterator) m_lpi; |
| org.apache.xpath.XPathContext xctxt = ki.getXPathContext(); |
| Vector keys = ki.getKeyDeclarations(); |
| |
| QName name = ki.getName(); |
| try |
| { |
| // System.out.println("lookupKey: "+lookupKey); |
| int nDeclarations = keys.size(); |
| |
| // Walk through each of the declarations made with xsl:key |
| for (int i = 0; i < nDeclarations; i++) |
| { |
| KeyDeclaration kd = (KeyDeclaration) keys.elementAt(i); |
| |
| // Only continue if the name on this key declaration |
| // matches the name on the iterator for this walker. |
| if (!kd.getName().equals(name)) |
| continue; |
| |
| foundKey = true; |
| // xctxt.setNamespaceContext(ki.getPrefixResolver()); |
| |
| // See if our node matches the given key declaration according to |
| // the match attribute on xsl:key. |
| XPath matchExpr = kd.getMatch(); |
| double score = matchExpr.getMatchScore(xctxt, testNode); |
| |
| if (score == kd.getMatch().MATCH_SCORE_NONE) |
| continue; |
| |
| return DTMIterator.FILTER_ACCEPT; |
| |
| } // end for(int i = 0; i < nDeclarations; i++) |
| } |
| catch (TransformerException se) |
| { |
| |
| // TODO: What to do? |
| } |
| |
| if (!foundKey) |
| throw new RuntimeException( |
| XSLMessages.createMessage( |
| XSLTErrorResources.ER_NO_XSLKEY_DECLARATION, |
| new Object[] { name.getLocalName()})); |
| |
| return DTMIterator.FILTER_REJECT; |
| } |
| |
| } |