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An alternate Scala Xml processing library
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/*
 * $Header$
 * $Revision: 1345 $
 * $Date: 2009-10-22 07:25:23 -0400 (Thu, 22 Oct 2009) $
 *
 * ====================================================================
 *
 * 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.
 * 
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 
 *   * Neither the name of the Jaxen Project nor the names of its
 *     contributors may be used to endorse or promote products derived 
 *     from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ====================================================================
 * 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: DefaultLocationPath.java 1345 2009-10-22 11:25:23Z elharo $
 */
package scales.xml.jaxen;

import org.jaxen.expr.*;
import org.jaxen.*;

abstract class DefaultBinaryExpr extends ADefaultExpr implements BinaryExpr
{
    private Expr lhs;
    private Expr rhs;

    DefaultBinaryExpr(Expr lhs, Expr rhs)
    {
        this.lhs = lhs;
        this.rhs = rhs;
    }

    public Expr getLHS()
    {
        return this.lhs;
    }

    public Expr getRHS()
    {
        return this.rhs;
    }

    public void setLHS(Expr lhs)
    {
        this.lhs = lhs;
    }

    public void setRHS(Expr rhs)
    {
        this.rhs = rhs;
    }

    public abstract String getOperator();

    public String getText()
    {
        return "(" + getLHS().getText() + " " + getOperator() + " " + getRHS().getText() +")";
    }

    public String toString()
    {
        return "[" + getClass().getName() + ": " + getLHS() + ", " + getRHS() + "]";
    }

    public Expr simplify()
    {
        setLHS( getLHS().simplify() );
        setRHS( getRHS().simplify() );

        return this;
    }
}