/*
* @(#)$Id: RedefinableExp.java,v 1.5 2001/07/28 02:50:39 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.grammar.xmlschema;
import com.sun.msv.grammar.ReferenceExp;
/**
* declaration that can be redefined by using <redefine> element.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public abstract class RedefinableExp extends ReferenceExp {
public RedefinableExp( String typeLocalName ) {
super(typeLocalName);
}
/** clones this object. */
public abstract RedefinableExp getClone();
/**
* assigns contents of rhs to this object.
*
* rhs and this object must be the same runtime type, and
* they must have the same name.
* this method redefines this object by the given component.
*
* derived class should override this method and copy
* necessary fields, should it necessary.
*/
public void redefine( RedefinableExp rhs ) {
if( this.getClass()!=rhs.getClass()
|| !this.name.equals(rhs.name) )
// two must be the same class.
throw new IllegalArgumentException();
this.exp = rhs.exp;
}
}