/*
 * @(#)$Id: BooleanType.java,v 1.23 2002/10/08 22:01:27 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.datatype.xsd;

import org.relaxng.datatype.ValidationContext;
import com.sun.msv.datatype.SerializationContext;

/**
 * "boolean" type.
 * 
 * type of the value object is <code>java.lang.Boolean</code>.
 * See http://www.w3.org/TR/xmlschema-2/#boolean for the spec
 * 
 * @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
 */
public class BooleanType extends BuiltinAtomicType {
	public static final BooleanType theInstance = new BooleanType();
	
	private BooleanType()	{ super("boolean"); }
	
	final public XSDatatype getBaseType() {
		return SimpleURType.theInstance;
	}
	
	protected boolean checkFormat( String content, ValidationContext context ) {
		return "true".equals(content) || "false".equals(content)
			|| "0".equals(content) || "1".equals(content);
	}
	
	public Object _createValue( String lexicalValue, ValidationContext context ) {
		// for string, lexical space is value space by itself
        return load(lexicalValue);
	}
    
    public static Boolean load( String s ) {
		if( s.equals("true") )		return Boolean.TRUE;
		if( s.equals("1") )			return Boolean.TRUE;
		if( s.equals("0") )			return Boolean.FALSE;
		if( s.equals("false") )		return Boolean.FALSE;
        return null;
    }

	public String convertToLexicalValue( Object value, SerializationContext context ) {
		if( value instanceof Boolean )
            return save( (Boolean)value );
		else
			throw new IllegalArgumentException();
	}

    public static String save( Boolean b ) {
		if( b.booleanValue()==true )	return "true";
		else							return "false";
    }
    
	public int isFacetApplicable( String facetName ) {
		if(facetName.equals(FACET_PATTERN)
		|| facetName.equals(FACET_ENUMERATION)
        || facetName.equals(FACET_WHITESPACE))
            return APPLICABLE;
		return NOT_ALLOWED;
	}
	public Class getJavaObjectType() {
		return Boolean.class;
	}
}