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/*
 * Copyright (c) 2001-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.sun.msv.reader.trex;

import com.sun.msv.reader.AbortException;
import com.sun.msv.reader.SimpleState;
import com.sun.msv.reader.State;
import com.sun.msv.util.StartTagInfo;

/**
 * <include> element as an immediate child of <grammar> element.
 * 
 * @author Kohsuke KAWAGUCHI
 */
public class IncludeMergeState extends SimpleState {
    
    protected State createChildState( StartTagInfo tag ) {
        // no child element is allowed by default.
        return null;
    }
    
    protected void endSelf() {
        // For RELAX NG, inclusion has to be done at the endSelf method,
        // not in the startSelf method.
        final String href = startTag.getAttribute("href");

        if(href==null)
        {// name attribute is required.
            reader.reportError( TREXBaseReader.ERR_MISSING_ATTRIBUTE,
                "include","href");
            // recover by ignoring this include element
        }
        else
            try {
                // parse specified file
                TREXBaseReader reader = (TREXBaseReader) this.reader;
                reader.switchSource(this,href,reader.sfactory.includedGrammar());
            } catch( AbortException e ) {
                // recover by ignoring the error
            }
        
        super.endSelf();
    }
}