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Java > Open Source Codes > com > google > gwt > dev > jjs > ast > JNullLiteral


1 /*
2  * Copyright 2007 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 package com.google.gwt.dev.jjs.ast;
17
18 /**
19  * Java null literal expression.
20  */
21 public class JNullLiteral extends JValueLiteral {
22
23   /**
24    * These are only supposed to be constructed by JProgram.
25    */
26   JNullLiteral(JProgram program) {
27     super(program);
28   }
29
30   public JType getType() {
31     return program.getTypeNull();
32   }
33
34   public Object JavaDoc getValueObj() {
35     return null;
36   }
37
38   public void traverse(JVisitor visitor, Context ctx) {
39     if (visitor.visit(this, ctx)) {
40     }
41     visitor.endVisit(this, ctx);
42   }
43 }
44
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