| /* |
| * 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. |
| */ |
| /* |
| * $Id: ContextMatchStepPattern.java 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xpath.patterns; |
| |
| import org.apache.xml.dtm.Axis; |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.DTMAxisTraverser; |
| import org.apache.xml.dtm.DTMFilter; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.axes.WalkerFactory; |
| import org.apache.xpath.objects.XObject; |
| /** |
| * Special context node pattern matcher. |
| */ |
| public class ContextMatchStepPattern extends StepPattern |
| { |
| static final long serialVersionUID = -1888092779313211942L; |
| |
| /** |
| * Construct a ContextMatchStepPattern. |
| * |
| */ |
| public ContextMatchStepPattern(int axis, int paxis) |
| { |
| super(DTMFilter.SHOW_ALL, axis, paxis); |
| } |
| |
| /** |
| * Execute this pattern step, including predicates. |
| * |
| * |
| * @param xctxt XPath runtime context. |
| * |
| * @return {@link org.apache.xpath.patterns.NodeTest#SCORE_NODETEST}, |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_NONE}, |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_NSWILD}, |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_QNAME}, or |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_OTHER}. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) |
| throws javax.xml.transform.TransformerException |
| { |
| |
| if (xctxt.getIteratorRoot() == xctxt.getCurrentNode()) |
| return getStaticScore(); |
| else |
| return this.SCORE_NONE; |
| } |
| |
| /** |
| * Execute the match pattern step relative to another step. |
| * |
| * |
| * @param xctxt The XPath runtime context. |
| * NEEDSDOC @param prevStep |
| * |
| * @return {@link org.apache.xpath.patterns.NodeTest#SCORE_NODETEST}, |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_NONE}, |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_NSWILD}, |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_QNAME}, or |
| * {@link org.apache.xpath.patterns.NodeTest#SCORE_OTHER}. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject executeRelativePathPattern( |
| XPathContext xctxt, StepPattern prevStep) |
| throws javax.xml.transform.TransformerException |
| { |
| |
| XObject score = NodeTest.SCORE_NONE; |
| int context = xctxt.getCurrentNode(); |
| DTM dtm = xctxt.getDTM(context); |
| |
| if (null != dtm) |
| { |
| int predContext = xctxt.getCurrentNode(); |
| DTMAxisTraverser traverser; |
| |
| int axis = m_axis; |
| |
| boolean needToTraverseAttrs = WalkerFactory.isDownwardAxisOfMany(axis); |
| boolean iterRootIsAttr = (dtm.getNodeType(xctxt.getIteratorRoot()) |
| == DTM.ATTRIBUTE_NODE); |
| |
| if((Axis.PRECEDING == axis) && iterRootIsAttr) |
| { |
| axis = Axis.PRECEDINGANDANCESTOR; |
| } |
| |
| traverser = dtm.getAxisTraverser(axis); |
| |
| for (int relative = traverser.first(context); DTM.NULL != relative; |
| relative = traverser.next(context, relative)) |
| { |
| try |
| { |
| xctxt.pushCurrentNode(relative); |
| |
| score = execute(xctxt); |
| |
| if (score != NodeTest.SCORE_NONE) |
| { |
| //score = executePredicates( xctxt, prevStep, SCORE_OTHER, |
| // predContext, relative); |
| if (executePredicates(xctxt, dtm, context)) |
| return score; |
| |
| score = NodeTest.SCORE_NONE; |
| } |
| |
| if(needToTraverseAttrs && iterRootIsAttr |
| && (DTM.ELEMENT_NODE == dtm.getNodeType(relative))) |
| { |
| int xaxis = Axis.ATTRIBUTE; |
| for (int i = 0; i < 2; i++) |
| { |
| DTMAxisTraverser atraverser = dtm.getAxisTraverser(xaxis); |
| |
| for (int arelative = atraverser.first(relative); |
| DTM.NULL != arelative; |
| arelative = atraverser.next(relative, arelative)) |
| { |
| try |
| { |
| xctxt.pushCurrentNode(arelative); |
| |
| score = execute(xctxt); |
| |
| if (score != NodeTest.SCORE_NONE) |
| { |
| //score = executePredicates( xctxt, prevStep, SCORE_OTHER, |
| // predContext, arelative); |
| |
| if (score != NodeTest.SCORE_NONE) |
| return score; |
| } |
| } |
| finally |
| { |
| xctxt.popCurrentNode(); |
| } |
| } |
| xaxis = Axis.NAMESPACE; |
| } |
| } |
| |
| } |
| finally |
| { |
| xctxt.popCurrentNode(); |
| } |
| } |
| |
| } |
| |
| return score; |
| } |
| |
| } |