- /*
- * 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;
- }
- }