bundles/org.eclipse.wst.xsl.core/src_validation/org/eclipse/wst/xsl/core/internal/compiler/xslt10/templates/XSLTVisitor.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 2002-2004 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: XSLTVisitor.java,v 1.2 2008/03/28 02:38:15 dacarver Exp $
 */
package org.eclipse.wst.xsl.core.internal.compiler.xslt10.templates;

import org.apache.xpath.XPathVisitor;

/**
 * A derivation from this class can be passed to a class that implements the
 * XSLTVisitable interface, to have the appropriate method called for each
 * component of an XSLT stylesheet. Aside from possible other uses, the main
 * intention is to provide a reasonable means to perform expression rewriting.
 */
public class XSLTVisitor extends XPathVisitor {
	/**
	 * Visit an XSLT instruction. Any element that isn't called by one of the
	 * other visit methods, will be called by this method.
	 * 
	 * @param elem
	 *            The xsl instruction element object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitInstruction(ElemTemplateElement elem) {
		return true;
	}

	/**
	 * Visit an XSLT stylesheet instruction.
	 * 
	 * @param elem
	 *            The xsl instruction element object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitStylesheet(ElemTemplateElement elem) {
		return true;
	}

	/**
	 * Visit an XSLT top-level instruction.
	 * 
	 * @param elem
	 *            The xsl instruction element object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitTopLevelInstruction(ElemTemplateElement elem) {
		return true;
	}

	/**
	 * Visit an XSLT top-level instruction.
	 * 
	 * @param elem
	 *            The xsl instruction element object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitTopLevelVariableOrParamDecl(ElemTemplateElement elem) {
		return true;
	}

	/**
	 * Visit an XSLT variable or parameter declaration.
	 * 
	 * @param elem
	 *            The xsl instruction element object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitVariableOrParamDecl(ElemVariable elem) {
		return true;
	}

	/**
	 * Visit a LiteralResultElement.
	 * 
	 * @param elem
	 *            The literal result object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitLiteralResultElement(ElemLiteralResult elem) {
		return true;
	}

	/**
	 * Visit an Attribute Value Template (at the top level).
	 * 
	 * @param elem
	 *            The attribute value template object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitAVT(AVT elem) {
		return true;
	}

	/**
	 * Visit an extension element.
	 * 
	 * @param elem
	 *            The extension object.
	 * @return true if the sub expressions should be traversed.
	 */
	public boolean visitExtensionElement(ElemExtensionCall elem) {
		return true;
	}

}