View Javadoc

1   /*
2    * Copyright 2002-2006 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of 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,
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  }