/*
 * @(#)$Id: RootGrammarState.java,v 1.9 2002/03/04 01:54:06 kk122374 Exp $
 *
 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */
package com.sun.msv.relaxns.reader;

import java.util.Iterator;
import org.iso_relax.dispatcher.IslandSchema;
import org.xml.sax.ErrorHandler;
import com.sun.msv.relaxns.verifier.SchemaProviderImpl;
import com.sun.msv.relaxns.verifier.IslandSchemaImpl;
import com.sun.msv.relaxns.grammar.relax.RELAXIslandSchema;
import com.sun.msv.util.StartTagInfo;
import com.sun.msv.reader.State;
import com.sun.msv.reader.SimpleState;
import com.sun.msv.reader.ExpressionOwner;
import com.sun.msv.grammar.Expression;

/**
 * invokes State object that parses the document element.
 * 
 * this state is used only one when starting parsing a RELAX schema.
 * For included module/grammar, different states are used.
 * 
 * @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
 */
public class RootGrammarState extends SimpleState implements ExpressionOwner
{
	protected State createChildState( StartTagInfo tag ) {
		if(tag.localName.equals("grammar") ) 
			// it is a grammar.
			return new GrammarState();
		
		return null;
	}
	
	protected void endSelf()
	{// wrap-up.
		final RELAXNSReader reader = (RELAXNSReader)this.reader;
		
		SchemaProviderImpl schemaProvider = new SchemaProviderImpl(reader.grammar);
		reader.schemaProvider = schemaProvider;
		
		if(!reader.controller.hadError()) {
			// abort further wrap up if there was an error.
			
			// then bind it as the final wrap-up.
			if( !schemaProvider.bind(reader.controller) )
				reader.controller.setErrorFlag();
		
			// also bind top-level expression
			if( reader.grammar.topLevel!=null )
				// this 'if' clause is necessary when
				// <topLevel> is not specified (which is an error, and already reported.)
				reader.grammar.topLevel = 
					reader.grammar.topLevel.visit(
						new IslandSchemaImpl.Binder(schemaProvider, reader.controller, reader.pool ) );
		}
	}
	
	// GrammarState implements ExpressionState,
	// so RootState has to implement ExpressionOwner.
	public final void onEndChild(Expression exp) {}
}