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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
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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.
/**
 * The '=' operation expression executer.
 */
public class Equals extends Operation
{
    static final long serialVersionUID = -2658315633903426134L;

  
Apply the operation to two operands, and return the result.
Params:
left – non-null reference to the evaluated left operand.
right – non-null reference to the evaluated right operand.
Throws:
TransformerException – 
Returns:
non-null reference to the XObject that represents the result of the operation./**
   * 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.
Params:
xctxt – The runtime execution context.
Throws:
TransformerException – 
Returns:
The XObject result of the operation./**
   * 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;
  }

}