/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * 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.
 */
package org.apache.qetest.xsl;

import org.xml.sax.SAXException;
import org.xml.sax.ext.LexicalHandler;

/**
 * Cheap-o LexicalHandler for use by API tests. This is a wrapper LexicalHandler.
 * It always delegate the lexical analysis to wrapped LexicalHandler.
 */
public class CheckingLexicalHandler implements LexicalHandler {
    /**
     * Default handler
     */
    private final LexicalHandler defaultHandler;
    
    /**
     * Default constructor.
     */
    public CheckingLexicalHandler() {
        defaultHandler = null;
    } 
    
    /**
     * Constructor by setting LexicalHandler.
     * @param lh a delegated LexicalHandler.
     */
    public CheckingLexicalHandler(LexicalHandler lh) {
        defaultHandler = lh;
    } 
    
    ////////////////// Implement LexicalHandler //////////////////
    @Override
    public void startDTD(String name, String publicId, String systemId) throws SAXException {
        if(null != defaultHandler)
            defaultHandler.startDTD(name, publicId, systemId);
    }

    @Override
    public void endDTD() throws SAXException {
        if(null != defaultHandler)
            defaultHandler.endDTD();
    }

    @Override
    public void startEntity(String name) throws SAXException {
        if(null != defaultHandler)
            defaultHandler.startEntity(name);
    }

    @Override
    public void endEntity(String name) throws SAXException {
        if(null != defaultHandler)
            defaultHandler.endEntity(name);
    }

    @Override
    public void startCDATA() throws SAXException {
        if(null != defaultHandler)
            defaultHandler.startCDATA();
    }

    @Override
    public void endCDATA() throws SAXException {
        if(null != defaultHandler)
            defaultHandler.endCDATA();
    }

    @Override
    public void comment(char ch[], int start, int length) throws SAXException {
        if(null != defaultHandler)
            defaultHandler.comment(ch, start, length);
    }
}