/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: Equals.java,v 1.2.4.1 2005/09/14 21:31:44 jeffsuttor Exp $
*/
package com.sun.org.apache.xpath.internal.operations;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XBoolean;
import com.sun.org.apache.xpath.internal.objects.XObject;
/**
* The '=' operation expression executer.
*/
public class Equals extends Operation
{
static final long serialVersionUID = -2658315633903426134L;
/**
* Apply the operation to two operands, and return the result.
*
*
* @param left non-null reference to the evaluated left operand.
* @param right non-null reference to the evaluated right operand.
*
* @return non-null reference to the XObject that represents the result of the operation.
*
* @throws javax.xml.transform.TransformerException
*/
public XObject operate(XObject left, XObject right)
throws javax.xml.transform.TransformerException
{
return left.equals(right) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
/**
* Execute a binary operation by calling execute on each of the operands,
* and then calling the operate method on the derived class.
*
*
* @param xctxt The runtime execution context.
*
* @return The XObject result of the operation.
*
* @throws javax.xml.transform.TransformerException
*/
public boolean bool(XPathContext xctxt)
throws javax.xml.transform.TransformerException
{
XObject left = m_left.execute(xctxt, true);
XObject right = m_right.execute(xctxt, true);
boolean result = left.equals(right) ? true : false;
left.detach();
right.detach();
return result;
}
}