01: /*
02: * Copyright 2002-2006 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of 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,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.apache.commons.jexl.parser;
18:
19: import org.apache.commons.jexl.JexlContext;
20:
21: /**
22: * 'null'.
23: *
24: * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
25: */
26: public class ASTNullLiteral extends SimpleNode {
27: /**
28: * Create the node given an id.
29: *
30: * @param id node id.
31: */
32: public ASTNullLiteral(int id) {
33: super (id);
34: }
35:
36: /**
37: * Create a node with the given parser and id.
38: *
39: * @param p a parser.
40: * @param id node id.
41: */
42: public ASTNullLiteral(Parser p, int id) {
43: super (p, id);
44: }
45:
46: /** {@inheritDoc} */
47: public Object jjtAccept(ParserVisitor visitor, Object data) {
48: return visitor.visit(this , data);
49: }
50:
51: /** {@inheritDoc} */
52: public Object value(JexlContext context) {
53: return null;
54: }
55: }
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