- /*
- * 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 org.apache.xml.dtm.DTM;
- import org.apache.xml.dtm.DTMIterator;
- import org.apache.xml.utils.NodeVector;
- import org.apache.xml.utils.XMLString;
- import org.apache.xpath.objects.XNodeSet;
- import org.apache.xpath.objects.XObject;
- import java.util.Vector;
- import org.apache.xml.utils.QName;
- import org.apache.xalan.templates.KeyDeclaration;
- import org.apache.xalan.res.XSLMessages;
- import org.apache.xalan.res.XSLTErrorResources;
-
- /**
- * <meta name="usage" content="internal"/>
- * This class filters nodes from a key iterator, according to
- * whether or not the use value matches the ref value.
- */
- public class KeyRefIterator extends org.apache.xpath.axes.ChildTestIterator
- {
- /**
- * Constructor KeyRefIterator
- *
- *
- * @param ref Key value to match
- * @param ki The main key iterator used to walk the source tree
- */
- public KeyRefIterator(QName name, XMLString ref, Vector keyDecls, DTMIterator ki)
- {
- super(null);
- m_name = name;
- m_ref = ref;
- m_keyDeclarations = keyDecls;
- m_keysNodes = ki;
- setWhatToShow(org.apache.xml.dtm.DTMFilter.SHOW_ALL);
- }
-
- DTMIterator m_keysNodes;
-
- /**
- * Get the next node via getNextXXX. Bottlenecked for derived class override.
- * @return The next node on the axis, or DTM.NULL.
- */
- protected int getNextNode()
- {
- int next;
- while(DTM.NULL != (next = m_keysNodes.nextNode()))
- {
- if(DTMIterator.FILTER_ACCEPT == filterNode(next))
- break;
- }
- m_lastFetched = next;
-
- return next;
- }
-
-
- /**
- * 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 filterNode(int testNode)
- {
- boolean foundKey = false;
- Vector keys = m_keyDeclarations;
-
- QName name = m_name;
- KeyIterator ki = (KeyIterator)(((XNodeSet)m_keysNodes).getContainedIter());
- org.apache.xpath.XPathContext xctxt = ki.getXPathContext();
-
- if(null == xctxt)
- assertion(false, "xctxt can not be null here!");
-
- try
- {
- XMLString lookupKey = m_ref;
-
- // 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());
-
- // Query from the node, according the the select pattern in the
- // use attribute in xsl:key.
- XObject xuse = kd.getUse().execute(xctxt, testNode, ki.getPrefixResolver());
-
- if (xuse.getType() != xuse.CLASS_NODESET)
- {
- XMLString exprResult = xuse.xstr();
-
- if (lookupKey.equals(exprResult))
- return DTMIterator.FILTER_ACCEPT;
- }
- else
- {
- DTMIterator nl = ((XNodeSet)xuse).iterRaw();
- int useNode;
-
- while (DTM.NULL != (useNode = nl.nextNode()))
- {
- DTM dtm = getDTM(useNode);
- XMLString exprResult = dtm.getStringValue(useNode);
- if ((null != exprResult) && lookupKey.equals(exprResult))
- return DTMIterator.FILTER_ACCEPT;
- }
- }
-
- } // end for(int i = 0; i < nDeclarations; i++)
- }
- catch (javax.xml.transform.TransformerException te)
- {
- throw new org.apache.xml.utils.WrappedRuntimeException(te);
- }
-
- if (!foundKey)
- throw new RuntimeException(
- XSLMessages.createMessage(
- XSLTErrorResources.ER_NO_XSLKEY_DECLARATION,
- new Object[] { name.getLocalName()}));
- return DTMIterator.FILTER_REJECT;
- }
-
- protected XMLString m_ref;
- protected QName m_name;
-
- /** Vector of Key declarations in the stylesheet.
- * @serial */
- protected Vector m_keyDeclarations;
-
- }