/*
 * @(#)$Id: StringState.java,v 1.4 2001/10/18 23:52:14 Bear 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.reader.trex.classic;

import com.sun.msv.grammar.Expression;
import com.sun.msv.reader.ExpressionWithoutChildState;
import com.sun.msv.util.StringPair;
import com.sun.msv.datatype.xsd.StringType;
import com.sun.msv.datatype.xsd.TokenType;
import com.sun.msv.datatype.xsd.WhiteSpaceProcessor;

/**
 * parses <string> pattern.
 * 
 * @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
 */
public class StringState extends ExpressionWithoutChildState
{
	protected final StringBuffer text = new StringBuffer();
	
	public void characters( char[] buf, int from, int len ) {
		text.append(buf,from,len);
	}
	
	public void ignorableWhitespace( char[] buf, int from, int len ) {
		text.append(buf,from,len);
	}
	
	protected Expression makeExpression() {
		if("preserve".equals(startTag.getAttribute("whiteSpace")))
			return reader.pool.createValue(
				StringType.theInstance,
				new StringPair("","string"),
				text.toString() );
		else
			return reader.pool.createValue(
				TokenType.theInstance,
				new StringPair("","token"),
				WhiteSpaceProcessor.collapse(text.toString()) );
		
		// masquerade RELAX NG built-in datatypes
	}
}