- /*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed 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,v 1.6 2004/02/17 04:35:37 minchau Exp $
- */
- package com.sun.org.apache.xpath.internal.patterns;
-
- import com.sun.org.apache.xml.internal.dtm.Axis;
- import com.sun.org.apache.xml.internal.dtm.DTM;
- import com.sun.org.apache.xml.internal.dtm.DTMAxisTraverser;
- import com.sun.org.apache.xml.internal.dtm.DTMFilter;
- import com.sun.org.apache.xpath.internal.XPathContext;
- import com.sun.org.apache.xpath.internal.axes.WalkerFactory;
- import com.sun.org.apache.xpath.internal.objects.XObject;
- /**
- * Special context node pattern matcher.
- */
- public class ContextMatchStepPattern extends StepPattern
- {
-
- /**
- * Construct a ContextMatchStepPattern.
- *
- * @param whatToShow Bit set defined mainly by {@link org.w3c.dom.traversal.NodeFilter}.
- */
- 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 com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NODETEST},
- * {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NONE},
- * {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NSWILD},
- * {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_QNAME}, or
- * {@link com.sun.org.apache.xpath.internal.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 com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NODETEST},
- * {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NONE},
- * {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_NSWILD},
- * {@link com.sun.org.apache.xpath.internal.patterns.NodeTest#SCORE_QNAME}, or
- * {@link com.sun.org.apache.xpath.internal.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;
- }
-
- }