| /* |
| * 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.xpath.functions; |
| |
| import java.util.Hashtable; |
| import java.util.StringTokenizer; |
| |
| import org.apache.xpath.res.XPATHErrorResources; |
| |
| //import org.w3c.dom.Node; |
| //import org.w3c.dom.traversal.NodeIterator; |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.DTMIterator; |
| |
| import java.util.Vector; |
| |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.DOMHelper; |
| import org.apache.xpath.XPath; |
| import org.apache.xpath.NodeSetDTM; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.objects.XNodeSet; |
| import org.apache.xml.utils.StringVector; |
| |
| /** |
| * <meta name="usage" content="advanced"/> |
| * Execute the Id() function. |
| */ |
| public class FuncId extends FunctionOneArg |
| { |
| |
| /** |
| * Fill in a list with nodes that match a space delimited list if ID |
| * ID references. |
| * |
| * @param xctxt The runtime XPath context. |
| * @param docContext The document where the nodes are being looked for. |
| * @param refval A space delimited list of ID references. |
| * @param usedrefs List of references for which nodes were found. |
| * @param nodeSet Node set where the nodes will be added to. |
| * @param mayBeMore true if there is another set of nodes to be looked for. |
| * |
| * @return The usedrefs value. |
| */ |
| private StringVector getNodesByID(XPathContext xctxt, int docContext, |
| String refval, StringVector usedrefs, |
| NodeSetDTM nodeSet, boolean mayBeMore) |
| { |
| |
| if (null != refval) |
| { |
| String ref = null; |
| // DOMHelper dh = xctxt.getDOMHelper(); |
| StringTokenizer tokenizer = new StringTokenizer(refval); |
| boolean hasMore = tokenizer.hasMoreTokens(); |
| DTM dtm = xctxt.getDTM(docContext); |
| |
| while (hasMore) |
| { |
| ref = tokenizer.nextToken(); |
| hasMore = tokenizer.hasMoreTokens(); |
| |
| if ((null != usedrefs) && usedrefs.contains(ref)) |
| { |
| ref = null; |
| |
| continue; |
| } |
| |
| int node = dtm.getElementById(ref); |
| |
| if (DTM.NULL != node) |
| nodeSet.addNodeInDocOrder(node, xctxt); |
| |
| if ((null != ref) && (hasMore || mayBeMore)) |
| { |
| if (null == usedrefs) |
| usedrefs = new StringVector(); |
| |
| usedrefs.addElement(ref); |
| } |
| } |
| } |
| |
| return usedrefs; |
| } |
| |
| /** |
| * Execute the function. The function must return |
| * a valid object. |
| * @param xctxt The current execution context. |
| * @return A valid XObject. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException |
| { |
| |
| int context = xctxt.getCurrentNode(); |
| DTM dtm = xctxt.getDTM(context); |
| int docContext = dtm.getDocument(); |
| |
| if (DTM.NULL == docContext) |
| error(xctxt, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC, null); |
| |
| XObject arg = m_arg0.execute(xctxt); |
| int argType = arg.getType(); |
| XNodeSet nodes = new XNodeSet(xctxt.getDTMManager()); |
| NodeSetDTM nodeSet = nodes.mutableNodeset(); |
| |
| if (XObject.CLASS_NODESET == argType) |
| { |
| DTMIterator ni = arg.iter(); |
| StringVector usedrefs = null; |
| int pos = ni.nextNode(); |
| |
| while (DTM.NULL != pos) |
| { |
| DTM ndtm = ni.getDTM(pos); |
| String refval = ndtm.getStringValue(pos).toString(); |
| |
| pos = ni.nextNode(); |
| usedrefs = getNodesByID(xctxt, docContext, refval, usedrefs, nodeSet, |
| DTM.NULL != pos); |
| } |
| // ni.detach(); |
| } |
| else if (XObject.CLASS_NULL == argType) |
| { |
| return nodes; |
| } |
| else |
| { |
| String refval = arg.str(); |
| |
| getNodesByID(xctxt, docContext, refval, null, nodeSet, false); |
| } |
| |
| return nodes; |
| } |
| } |