bundles/org.eclipse.wst.xsl.core/src_validation/org/eclipse/wst/xsl/core/internal/compiler/xslt10/transformer/TransformSnapshotImpl.java - sourceediting/webtools.sourceediting.xsl - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008 Standards for Technology in Automotive Retail
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     David Carver - STAR - bug 224197 - initial API and implementation
  *                    based on work from Apache Xalan 2.7.0
  *******************************************************************************/
 /*
  * 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: TransformSnapshotImpl.java,v 1.2 2008/03/28 02:38:16 dacarver Exp $
  */
 package org.eclipse.wst.xsl.core.internal.compiler.xslt10.transformer;

 import java.util.Stack;

 import org.apache.xml.dtm.DTMIterator;
 import org.apache.xml.utils.BoolStack;
 import org.apache.xml.utils.IntStack;
 import org.apache.xml.utils.NodeVector;
 import org.apache.xml.utils.ObjectStack;
 import org.apache.xpath.VariableStack;
 import org.apache.xpath.XPathContext;

 import org.apache.xml.serializer.NamespaceMappings;
 import org.apache.xml.serializer.SerializationHandler;

 /**
  * This class holds a "snapshot" of it's current transformer state, which can
  * later be restored.
  *
  * This only saves state which can change over the course of the
  * side-effect-free (i.e. no extensions that call setURIResolver, etc.).
  *
  * @deprecated It doesn't look like this code, which is for tooling, has
  *             functioned propery for a while, so it doesn't look like it is
  *             being used.
  */
 @Deprecated
 public class TransformSnapshotImpl implements TransformSnapshot {

 	/**
 	 * The stack of Variable stack frames.
 	 */
 	private VariableStack m_variableStacks;

 	/**
 	 * The stack of <a href="http://www.w3.org/TR/xslt#dt-current-node">current
 	 * node</a> objects. Not to be confused with the current node list.
 	 */
 	private IntStack m_currentNodes;

 	/** A stack of the current sub-expression nodes. */
 	private IntStack m_currentExpressionNodes;

 	/**
 	 * The current context node lists stack.
 	 */
 	private Stack m_contextNodeLists;

 	/**
 	 * The current context node list.
 	 */
 	private DTMIterator m_contextNodeList;

 	/**
 	 * Stack of AxesIterators.
 	 */
 	private Stack m_axesIteratorStack;

 	/**
 	 * Is > 0 when we're processing a for-each.
 	 */
 	private BoolStack m_currentTemplateRuleIsNull;

 	/**
 	 * A node vector used as a stack to track the current ElemTemplateElement.
 	 * Needed for the org.apache.xalan.transformer.TransformState interface, so
 	 * a tool can discover the calling template.
 	 */
 	private ObjectStack m_currentTemplateElements;

 	/**
 	 * A node vector used as a stack to track the current ElemTemplate that was
 	 * matched, as well as the node that was matched. Needed for the
 	 * org.apache.xalan.transformer.TransformState interface, so a tool can
 	 * discover the matched template, and matched node.
 	 */
 	private Stack m_currentMatchTemplates;

 	/**
 	 * A node vector used as a stack to track the current ElemTemplate that was
 	 * matched, as well as the node that was matched. Needed for the
 	 * org.apache.xalan.transformer.TransformState interface, so a tool can
 	 * discover the matched template, and matched node.
 	 */
 	private NodeVector m_currentMatchNodes;

 	/**
 	 * The table of counters for xsl:number support.
 	 *
 	 * @see ElemNumber
 	 */
 	private CountersTable m_countersTable;

 	/**
 	 * Stack for the purposes of flagging infinite recursion with attribute
 	 * sets.
 	 */
 	private Stack m_attrSetStack;

 	/** Indicate whether a namespace context was pushed */
 	boolean m_nsContextPushed;

 	/**
 	 * Use the SAX2 helper class to track result namespaces.
 	 */
 	private NamespaceMappings m_nsSupport;

 	/** The number of events queued */
 	// int m_eventCount;
 	/**
 	 * Constructor TransformSnapshotImpl Take a snapshot of the currently
 	 * executing context.
 	 *
 	 * @param transformer
 	 *            Non null transformer instance
 	 * @deprecated It doesn't look like this code, which is for tooling, has
 	 *             functioned propery for a while, so it doesn't look like it is
 	 *             being used.
 	 */
 	@Deprecated
 	public TransformSnapshotImpl(TransformerImpl transformer) {

 		try {

 			// Are all these clones deep enough?
 			SerializationHandler rtf = transformer.getResultTreeHandler();

 			{
 				// save serializer fields
 				m_nsSupport = (NamespaceMappings) rtf.getNamespaceMappings()
 						.clone();

 				// Do other fields need to be saved/restored?
 			}

 			XPathContext xpc = transformer.getXPathContext();

 			m_variableStacks = (VariableStack) xpc.getVarStack().clone();
 			m_currentNodes = (IntStack) xpc.getCurrentNodeStack().clone();
 			m_currentExpressionNodes = (IntStack) xpc
 					.getCurrentExpressionNodeStack().clone();
 			m_contextNodeLists = (Stack) xpc.getContextNodeListsStack().clone();

 			if (!m_contextNodeLists.empty())
 				m_contextNodeList = (DTMIterator) xpc.getContextNodeList()
 						.clone();

 			m_axesIteratorStack = (Stack) xpc.getAxesIteratorStackStacks()
 					.clone();
 			m_currentTemplateRuleIsNull = (BoolStack) transformer.m_currentTemplateRuleIsNull
 					.clone();
 			m_currentTemplateElements = (ObjectStack) transformer.m_currentTemplateElements
 					.clone();
 			m_currentMatchTemplates = (Stack) transformer.m_currentMatchTemplates
 					.clone();
 			m_currentMatchNodes = (NodeVector) transformer.m_currentMatchedNodes
 					.clone();
 			m_countersTable = (CountersTable) transformer.getCountersTable()
 					.clone();

 			if (transformer.m_attrSetStack != null)
 				m_attrSetStack = (Stack) transformer.m_attrSetStack.clone();
 		} catch (CloneNotSupportedException cnse) {
 			throw new org.apache.xml.utils.WrappedRuntimeException(cnse);
 		}
 	}

 	/**
 	 * This will reset the stylesheet to a given execution context based on some
 	 * previously taken snapshot where we can then start execution
 	 *
 	 * @param transformer
 	 *            Non null transformer instance
 	 *
 	 * @deprecated It doesn't look like this code, which is for tooling, has
 	 *             functioned propery for a while, so it doesn't look like it is
 	 *             being used.
 	 */
 	@Deprecated
 	public void apply(TransformerImpl transformer) {

 		try {

 			// Are all these clones deep enough?
 			SerializationHandler rtf = transformer.getResultTreeHandler();

 			if (rtf != null) {
 				// restore serializer fields
 				rtf.setNamespaceMappings((NamespaceMappings) m_nsSupport
 						.clone());
 			}

 			XPathContext xpc = transformer.getXPathContext();

 			xpc.setVarStack((VariableStack) m_variableStacks.clone());
 			xpc.setCurrentNodeStack((IntStack) m_currentNodes.clone());
 			xpc
 					.setCurrentExpressionNodeStack((IntStack) m_currentExpressionNodes
 							.clone());
 			xpc.setContextNodeListsStack((Stack) m_contextNodeLists.clone());

 			if (m_contextNodeList != null)
 				xpc
 						.pushContextNodeList((DTMIterator) m_contextNodeList
 								.clone());

 			xpc.setAxesIteratorStackStacks((Stack) m_axesIteratorStack.clone());

 			transformer.m_currentTemplateRuleIsNull = (BoolStack) m_currentTemplateRuleIsNull
 					.clone();
 			transformer.m_currentTemplateElements = (ObjectStack) m_currentTemplateElements
 					.clone();
 			transformer.m_currentMatchTemplates = (Stack) m_currentMatchTemplates
 					.clone();
 			transformer.m_currentMatchedNodes = (NodeVector) m_currentMatchNodes
 					.clone();
 			transformer.m_countersTable = (CountersTable) m_countersTable
 					.clone();

 			if (m_attrSetStack != null)
 				transformer.m_attrSetStack = (Stack) m_attrSetStack.clone();
 		} catch (CloneNotSupportedException cnse) {
 			throw new org.apache.xml.utils.WrappedRuntimeException(cnse);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2008 Standards for Technology in Automotive Retail
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* David Carver - STAR - bug 224197 - initial API and implementation
	* based on work from Apache Xalan 2.7.0
	*******************************************************************************/
	/*
	* 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: TransformSnapshotImpl.java,v 1.2 2008/03/28 02:38:16 dacarver Exp $
	*/
	package org.eclipse.wst.xsl.core.internal.compiler.xslt10.transformer;

	import java.util.Stack;

	import org.apache.xml.dtm.DTMIterator;
	import org.apache.xml.utils.BoolStack;
	import org.apache.xml.utils.IntStack;
	import org.apache.xml.utils.NodeVector;
	import org.apache.xml.utils.ObjectStack;
	import org.apache.xpath.VariableStack;
	import org.apache.xpath.XPathContext;

	import org.apache.xml.serializer.NamespaceMappings;
	import org.apache.xml.serializer.SerializationHandler;

	/**
	* This class holds a "snapshot" of it's current transformer state, which can
	* later be restored.
	*
	* This only saves state which can change over the course of the
	* side-effect-free (i.e. no extensions that call setURIResolver, etc.).
	*
	* @deprecated It doesn't look like this code, which is for tooling, has
	* functioned propery for a while, so it doesn't look like it is
	* being used.
	*/
	@Deprecated
	public class TransformSnapshotImpl implements TransformSnapshot {

	/**
	* The stack of Variable stack frames.
	*/
	private VariableStack m_variableStacks;

	/**
	* The stack of <a href="http://www.w3.org/TR/xslt#dt-current-node">current
	* node</a> objects. Not to be confused with the current node list.
	*/
	private IntStack m_currentNodes;

	/** A stack of the current sub-expression nodes. */
	private IntStack m_currentExpressionNodes;

	/**
	* The current context node lists stack.
	*/
	private Stack m_contextNodeLists;

	/**
	* The current context node list.
	*/
	private DTMIterator m_contextNodeList;

	/**
	* Stack of AxesIterators.
	*/
	private Stack m_axesIteratorStack;

	/**
	* Is > 0 when we're processing a for-each.
	*/
	private BoolStack m_currentTemplateRuleIsNull;

	/**
	* A node vector used as a stack to track the current ElemTemplateElement.
	* Needed for the org.apache.xalan.transformer.TransformState interface, so
	* a tool can discover the calling template.
	*/
	private ObjectStack m_currentTemplateElements;

	/**
	* A node vector used as a stack to track the current ElemTemplate that was
	* matched, as well as the node that was matched. Needed for the
	* org.apache.xalan.transformer.TransformState interface, so a tool can
	* discover the matched template, and matched node.
	*/
	private Stack m_currentMatchTemplates;

	/**
	* A node vector used as a stack to track the current ElemTemplate that was
	* matched, as well as the node that was matched. Needed for the
	* org.apache.xalan.transformer.TransformState interface, so a tool can
	* discover the matched template, and matched node.
	*/
	private NodeVector m_currentMatchNodes;

	/**
	* The table of counters for xsl:number support.
	*
	* @see ElemNumber
	*/
	private CountersTable m_countersTable;

	/**
	* Stack for the purposes of flagging infinite recursion with attribute
	* sets.
	*/
	private Stack m_attrSetStack;

	/** Indicate whether a namespace context was pushed */
	boolean m_nsContextPushed;

	/**
	* Use the SAX2 helper class to track result namespaces.
	*/
	private NamespaceMappings m_nsSupport;

	/** The number of events queued */
	// int m_eventCount;
	/**
	* Constructor TransformSnapshotImpl Take a snapshot of the currently
	* executing context.
	*
	* @param transformer
	* Non null transformer instance
	* @deprecated It doesn't look like this code, which is for tooling, has
	* functioned propery for a while, so it doesn't look like it is
	* being used.
	*/
	@Deprecated
	public TransformSnapshotImpl(TransformerImpl transformer) {

	try {

	// Are all these clones deep enough?
	SerializationHandler rtf = transformer.getResultTreeHandler();

	{
	// save serializer fields
	m_nsSupport = (NamespaceMappings) rtf.getNamespaceMappings()
	.clone();

	// Do other fields need to be saved/restored?
	}

	XPathContext xpc = transformer.getXPathContext();

	m_variableStacks = (VariableStack) xpc.getVarStack().clone();
	m_currentNodes = (IntStack) xpc.getCurrentNodeStack().clone();
	m_currentExpressionNodes = (IntStack) xpc
	.getCurrentExpressionNodeStack().clone();
	m_contextNodeLists = (Stack) xpc.getContextNodeListsStack().clone();

	if (!m_contextNodeLists.empty())
	m_contextNodeList = (DTMIterator) xpc.getContextNodeList()
	.clone();

	m_axesIteratorStack = (Stack) xpc.getAxesIteratorStackStacks()
	.clone();
	m_currentTemplateRuleIsNull = (BoolStack) transformer.m_currentTemplateRuleIsNull
	.clone();
	m_currentTemplateElements = (ObjectStack) transformer.m_currentTemplateElements
	.clone();
	m_currentMatchTemplates = (Stack) transformer.m_currentMatchTemplates
	.clone();
	m_currentMatchNodes = (NodeVector) transformer.m_currentMatchedNodes
	.clone();
	m_countersTable = (CountersTable) transformer.getCountersTable()
	.clone();

	if (transformer.m_attrSetStack != null)
	m_attrSetStack = (Stack) transformer.m_attrSetStack.clone();
	} catch (CloneNotSupportedException cnse) {
	throw new org.apache.xml.utils.WrappedRuntimeException(cnse);
	}
	}

	/**
	* This will reset the stylesheet to a given execution context based on some
	* previously taken snapshot where we can then start execution
	*
	* @param transformer
	* Non null transformer instance
	*
	* @deprecated It doesn't look like this code, which is for tooling, has
	* functioned propery for a while, so it doesn't look like it is
	* being used.
	*/
	@Deprecated
	public void apply(TransformerImpl transformer) {

	try {

	// Are all these clones deep enough?
	SerializationHandler rtf = transformer.getResultTreeHandler();

	if (rtf != null) {
	// restore serializer fields
	rtf.setNamespaceMappings((NamespaceMappings) m_nsSupport
	.clone());
	}

	XPathContext xpc = transformer.getXPathContext();

	xpc.setVarStack((VariableStack) m_variableStacks.clone());
	xpc.setCurrentNodeStack((IntStack) m_currentNodes.clone());
	xpc
	.setCurrentExpressionNodeStack((IntStack) m_currentExpressionNodes
	.clone());
	xpc.setContextNodeListsStack((Stack) m_contextNodeLists.clone());

	if (m_contextNodeList != null)
	xpc
	.pushContextNodeList((DTMIterator) m_contextNodeList
	.clone());

	xpc.setAxesIteratorStackStacks((Stack) m_axesIteratorStack.clone());

	transformer.m_currentTemplateRuleIsNull = (BoolStack) m_currentTemplateRuleIsNull
	.clone();
	transformer.m_currentTemplateElements = (ObjectStack) m_currentTemplateElements
	.clone();
	transformer.m_currentMatchTemplates = (Stack) m_currentMatchTemplates
	.clone();
	transformer.m_currentMatchedNodes = (NodeVector) m_currentMatchNodes
	.clone();
	transformer.m_countersTable = (CountersTable) m_countersTable
	.clone();

	if (m_attrSetStack != null)
	transformer.m_attrSetStack = (Stack) m_attrSetStack.clone();
	} catch (CloneNotSupportedException cnse) {
	throw new org.apache.xml.utils.WrappedRuntimeException(cnse);
	}
	}
	}