- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999 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.XPathContext;
- import org.apache.xpath.axes.OneStepIteratorForward;
-
- /**
- * <meta name="usage" content="internal"/>
- * This class implements an optimized iterator for
- * "key()" patterns, matching each node to the
- * match attribute in one or more xsl:key declarations.
- */
- 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;
- }
-
- }