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


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 reference type.
20  */
21 public class JNullType extends JReferenceType {
22
23   public JNullType(JProgram program) {
24     super(program, null, "<null>");
25   }
26
27   public String JavaDoc getJavahSignatureName() {
28     return "N";
29   }
30
31   public String JavaDoc getJsniSignatureName() {
32     return "N";
33   }
34
35   public boolean isAbstract() {
36     return false;
37   }
38
39   public boolean isFinal() {
40     return true;
41   }
42
43   public void traverse(JVisitor visitor, Context ctx) {
44     if (visitor.visit(this, ctx)) {
45     }
46     visitor.endVisit(this, ctx);
47   }
48
49 }
50
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