| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.xml.security.transforms.implementations; |
| |
| import javax.xml.transform.TransformerException; |
| |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.security.utils.I18n; |
| import org.apache.xml.security.utils.XMLUtils; |
| import org.apache.xpath.NodeSetDTM; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.functions.Function; |
| import org.apache.xpath.objects.XNodeSet; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.res.XPATHErrorResources; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Node; |
| |
| /** |
| * The 'here()' function returns a node-set containing the attribute or |
| * processing instruction node or the parent element of the text node |
| * that directly bears the XPath expression. This expression results |
| * in an error if the containing XPath expression does not appear in the |
| * same XML document against which the XPath expression is being evaluated. |
| * |
| * Mainpart is stolen from FuncId.java |
| * |
| * This does crash under Xalan2.2.D7 and works under Xalan2.2.D9 |
| * |
| * To get this baby to work, a special trick has to be used. The function needs |
| * access to the Node where the XPath expression has been defined. This is done |
| * by constructing a {@link FuncHere} which has this Node as 'owner'. |
| * |
| * @see "http://www.w3.org/Signature/Drafts/xmldsig-core/Overview.html#function-here" |
| */ |
| public class FuncHere extends Function { |
| |
| /** |
| * |
| */ |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * The here function returns a node-set containing the attribute or |
| * processing instruction node or the parent element of the text node |
| * that directly bears the XPath expression. This expression results |
| * in an error if the containing XPath expression does not appear in the |
| * same XML document against which the XPath expression is being evaluated. |
| * |
| * @param xctxt |
| * @return the xobject |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) throws TransformerException { |
| |
| Node xpathOwnerNode = (Node) xctxt.getOwnerObject(); |
| |
| if (xpathOwnerNode == null) { |
| return null; |
| } |
| |
| int xpathOwnerNodeDTM = xctxt.getDTMHandleFromNode(xpathOwnerNode); |
| |
| int currentNode = xctxt.getCurrentNode(); |
| DTM dtm = xctxt.getDTM(currentNode); |
| int docContext = dtm.getDocument(); |
| |
| if (DTM.NULL == docContext) { |
| error(xctxt, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC, null); |
| } |
| |
| { |
| // check whether currentNode and the node containing the XPath expression |
| // are in the same document |
| Document currentDoc = |
| XMLUtils.getOwnerDocument(dtm.getNode(currentNode)); |
| Document xpathOwnerDoc = XMLUtils.getOwnerDocument(xpathOwnerNode); |
| |
| if (currentDoc != xpathOwnerDoc) { |
| throw new TransformerException(I18n.translate("xpath.funcHere.documentsDiffer")); |
| } |
| } |
| |
| XNodeSet nodes = new XNodeSet(xctxt.getDTMManager()); |
| NodeSetDTM nodeSet = nodes.mutableNodeset(); |
| |
| { |
| int hereNode = DTM.NULL; |
| |
| switch (dtm.getNodeType(xpathOwnerNodeDTM)) { |
| |
| case Node.ATTRIBUTE_NODE : |
| case Node.PROCESSING_INSTRUCTION_NODE : { |
| // returns a node-set containing the attribute / processing instruction node |
| hereNode = xpathOwnerNodeDTM; |
| |
| nodeSet.addNode(hereNode); |
| |
| break; |
| } |
| case Node.TEXT_NODE : { |
| // returns a node-set containing the parent element of the |
| // text node that directly bears the XPath expression |
| hereNode = dtm.getParent(xpathOwnerNodeDTM); |
| |
| nodeSet.addNode(hereNode); |
| |
| break; |
| } |
| default : |
| break; |
| } |
| } |
| |
| /** $todo$ Do I have to do this detach() call? */ |
| nodeSet.detach(); |
| |
| return nodes; |
| } |
| |
| /** |
| * No arguments to process, so this does nothing. |
| * @param vars |
| * @param globalsSize |
| */ |
| public void fixupVariables(@SuppressWarnings("rawtypes") java.util.Vector vars, int globalsSize) { //NOPMD |
| // do nothing |
| } |
| } |