package org.apache.velocity.runtime.parser.node;

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000-2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Velocity", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 */

import org.apache.velocity.context.InternalContextAdapter;
import org.apache.velocity.runtime.parser.Parser;

import org.apache.velocity.exception.MethodInvocationException;

public class ASTNENode extends SimpleNode
{
    public ASTNENode(int id)
    {
        super(id);
    }

    public ASTNENode(Parser p, int id)
    {
        super(p, id);
    }

    /** Accept the visitor. **/
    public Object jjtAccept(ParserVisitor visitor, Object data)
    {
        return visitor.visit(this, data);
    }

    public boolean evaluate(  InternalContextAdapter context)
        throws MethodInvocationException
    {
        Object left = jjtGetChild(0).value( context );
        Object right = jjtGetChild(1).value( context );

        /*
         *  null check
         */

        if ( left == null || right == null)
        {
            rsvc.error( ( left == null ? "Left" : "Right" ) + " side ("
                           + jjtGetChild( (left == null? 0 : 1) ).literal()
                           + ") of '!=' operation has null value."
                           + " Operation not possible. "
                           + context.getCurrentTemplateName() + " [line " + getLine() 
                           + ", column " + getColumn() + "]");
            return false;

        }


        /*
         *  check to see if they are the same class.  I don't think this is slower
         *  as I don't think that getClass() results in object creation, and we can
         *  extend == to handle all classes
         */

        if (left.getClass().equals( right.getClass() ) )
        {
            return !(left.equals( right ));
        }
        else
        {
            rsvc.error("Error in evaluation of != expression."
                          + " Both arguments must be of the same Class."
                          + " Currently left = " + left.getClass() + ", right = " 
                          + right.getClass() + ". "
                          + context.getCurrentTemplateName() + " [line " + getLine() 
                          + ", column " + getColumn() + "] (ASTEQNode)");
            
            return false;
        }
    }
}

@@ -4777,10 +4777,214 @@
 %7D%0A    %7D%0A
+%0A    public Object value(InternalContextAdapter context)%0A        throws MethodInvocationException%0A    %7B%0A        boolean val = evaluate(context);%0A%0A        return val ? Boolean.TRUE : Boolean.FALSE;%0A    %7D%0A%0A
 %7D%0A

Fix for #7396