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/*
 * $Header$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 *
 * Copyright 2000-2002 bob mcwhirter & James Strachan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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 *
 * ====================================================================
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Jaxen Project and was originally 
 * created by bob mcwhirter  and 
 * James Strachan .  For more information on the 
 * Jaxen Project, please see .
 * 
 * $Id$
 */



package org.jaxen.expr;


/**
 * Represents a binary expression. 
 * This does not match anything in the XPath 1.0 grammar, but in Jaxen
 * it includes the usual binary operations such as addition, multiplication,
 * logical and, logical or, and so forth.
 * 
 */
public interface BinaryExpr extends Expr
{
    
    /**
     * Returns the left-hand side of the binary expression.
     * 
     * @return the left hand side expression
     */
    Expr getLHS();

    
    /**
     * Returns the right-hand side of the binary expression.
     * 
     * @return the right-hand side expression
     */
    Expr getRHS();
    
    /**
     * Returns the operator for the binary expression such as "+" or
     * "div".
     * 
     * @return the operator for the expression
     */
    String getOperator();
    
}