bundles/org.eclipse.wst.xsl.core/src_validation/org/eclipse/wst/xsl/core/internal/compiler/xslt10/transformer/XalanTransformState.java

/*******************************************************************************
 * 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 2003-2004 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: XalanTransformState.java,v 1.2 2008/03/28 02:38:16 dacarver Exp $
 */

package org.eclipse.wst.xsl.core.internal.compiler.xslt10.transformer;

import javax.xml.transform.Transformer;

import org.eclipse.wst.xsl.core.internal.compiler.xslt10.templates.ElemTemplate;
import org.eclipse.wst.xsl.core.internal.compiler.xslt10.templates.ElemTemplateElement;
import org.apache.xml.dtm.DTM;
import org.apache.xml.dtm.DTMIterator;
import org.w3c.dom.Node;
import org.w3c.dom.traversal.NodeIterator;

/**
 * Before the serializer merge, the TransformState interface was implemented by
 * ResultTreeHandler.
 */
public class XalanTransformState implements TransformState {

	protected Node m_node = null;
	protected ElemTemplateElement m_currentElement = null;
	protected ElemTemplate m_currentTemplate = null;
	protected ElemTemplate m_matchedTemplate = null;
	protected int m_currentNodeHandle = DTM.NULL;
	protected Node m_currentNode = null;
	protected int m_matchedNode = DTM.NULL;
	protected DTMIterator m_contextNodeList = null;
	protected boolean m_elemPending = false;
	protected TransformerImpl m_transformer = null;

	/**
	 * @see org.apache.xml.serializer.TransformStateSetter#setCurrentNode(Node)
	 */
	public void setCurrentNode(Node n) {
		m_node = n;
	}

	/**
	 * @see org.apache.xml.serializer.TransformStateSetter#resetState(Transformer)
	 */
	public void resetState(Transformer transformer) {
		if ((transformer != null) && (transformer instanceof TransformerImpl)) {
			m_transformer = (TransformerImpl) transformer;
			m_currentElement = m_transformer.getCurrentElement();
			m_currentTemplate = m_transformer.getCurrentTemplate();
			m_matchedTemplate = m_transformer.getMatchedTemplate();
			int currentNodeHandle = m_transformer.getCurrentNode();
			DTM dtm = m_transformer.getXPathContext().getDTM(currentNodeHandle);
			m_currentNode = dtm.getNode(currentNodeHandle);
			m_matchedNode = m_transformer.getMatchedNode();
			m_contextNodeList = m_transformer.getContextNodeList();
		}
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getCurrentElement()
	 */
	public ElemTemplateElement getCurrentElement() {
		if (m_elemPending)
			return m_currentElement;
		else
			return m_transformer.getCurrentElement();
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getCurrentNode()
	 */
	public Node getCurrentNode() {
		if (m_currentNode != null) {
			return m_currentNode;
		} else {
			DTM dtm = m_transformer.getXPathContext().getDTM(
					m_transformer.getCurrentNode());
			return dtm.getNode(m_transformer.getCurrentNode());
		}
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getCurrentTemplate()
	 */
	public ElemTemplate getCurrentTemplate() {
		if (m_elemPending)
			return m_currentTemplate;
		else
			return m_transformer.getCurrentTemplate();
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getMatchedTemplate()
	 */
	public ElemTemplate getMatchedTemplate() {
		if (m_elemPending)
			return m_matchedTemplate;
		else
			return m_transformer.getMatchedTemplate();
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getMatchedNode()
	 */
	public Node getMatchedNode() {

		if (m_elemPending) {
			DTM dtm = m_transformer.getXPathContext().getDTM(m_matchedNode);
			return dtm.getNode(m_matchedNode);
		} else {
			DTM dtm = m_transformer.getXPathContext().getDTM(
					m_transformer.getMatchedNode());
			return dtm.getNode(m_transformer.getMatchedNode());
		}
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getContextNodeList()
	 */
	public NodeIterator getContextNodeList() {
		if (m_elemPending) {
			return new org.apache.xml.dtm.ref.DTMNodeIterator(m_contextNodeList);
		} else {
			return new org.apache.xml.dtm.ref.DTMNodeIterator(m_transformer
					.getContextNodeList());
		}
	}

	/**
	 * @see org.apache.xalan.transformer.TransformState#getTransformer()
	 */
	public Transformer getTransformer() {
		return m_transformer;
	}

}