code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with 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 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.
   */
  /*
   * $Id$
   */
  package org.apache.xpath.operations;
  
  import org.apache.xpath.XPathContext;
  import org.apache.xpath.objects.XBoolean;
  import org.apache.xpath.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;
    }
  
  }
  