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/*
* @(#)$Id: ExpressionVisitor.java 1566 2003-06-09 20:37:49Z kk122374 $
*
* 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.grammar;
/**
* Visitor interface for Expression and its derived types.
*
*
* You may want to use ExpressionVisitorXXXX class if you want to
* return boolean, void, or {@link Expression}.
*
*
* It is the callee's responsibility to traverse child expression.
* Expression and its derived classes do not provide any traversal.
* See {@link ExpressionCloner} for example.
*
*
* onRef method is called for all subclass of ReferenceExp. So you can safely use this
* interface to visit AGMs from RELAX grammar.
*
* @author Kohsuke KAWAGUCHI
*/
public interface ExpressionVisitor {
Object onAttribute( AttributeExp exp );
Object onChoice( ChoiceExp exp );
Object onElement( ElementExp exp );
Object onOneOrMore( OneOrMoreExp exp );
Object onMixed( MixedExp exp );
Object onList( ListExp exp );
Object onRef( ReferenceExp exp );
Object onOther( OtherExp exp );
Object onEpsilon();
Object onNullSet();
Object onAnyString();
Object onSequence( SequenceExp exp );
Object onData( DataExp exp );
Object onValue( ValueExp exp );
Object onConcur( ConcurExp p );
Object onInterleave( InterleaveExp p );
}