01: /*
02: * Copyright 2007 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License"); you may not
05: * use this file except in compliance with the License. You may obtain a copy of
06: * the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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 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: }
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