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Java > Open Source Codes > org > apache > velocity > runtime > parser > node > ASTNotNode


1 package org.apache.velocity.runtime.parser.node;
2
3 /*
4  * Copyright 2000-2001,2004 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import org.apache.velocity.context.InternalContextAdapter;
20 import org.apache.velocity.runtime.parser.*;
21
22 import org.apache.velocity.exception.MethodInvocationException;
23
24 public class ASTNotNode extends SimpleNode
25 {
26     public ASTNotNode(int id)
27     {
28         super(id);
29     }
30
31     public ASTNotNode(Parser p, int id)
32     {
33         super(p, id);
34     }
35
36     /** Accept the visitor. **/
37     public Object JavaDoc jjtAccept(ParserVisitor visitor, Object JavaDoc data)
38     {
39         return visitor.visit(this, data);
40     }
41
42     public boolean evaluate( InternalContextAdapter context)
43         throws MethodInvocationException
44     {
45         if (jjtGetChild(0).evaluate(context))
46             return false;
47         else
48             return true;
49     }
50
51     public Object JavaDoc value( InternalContextAdapter context)
52         throws MethodInvocationException
53     {
54         return (jjtGetChild(0).evaluate( context ) ? Boolean.FALSE : Boolean.TRUE) ;
55     }
56 }
57
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