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Java > Open Source Codes > org > apache > commons > jexl > parser > ASTIntegerLiteral


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 package org.apache.commons.jexl.parser;
17
18 import org.apache.commons.jexl.JexlContext;
19
20 /**
21  * represents an integer.
22  *
23  * @author <a HREF="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
24  * @version $Id: ASTIntegerLiteral.java 398202 2006-04-29 16:40:34Z dion $
25  */
26 public class ASTIntegerLiteral extends SimpleNode {
27     /** literal value. */
28     protected Integer JavaDoc val;
29
30     /**
31      * Create the node given an id.
32      *
33      * @param id node id.
34      */
35     public ASTIntegerLiteral(int id) {
36         super(id);
37     }
38
39     /**
40      * Create a node with the given parser and id.
41      *
42      * @param p a parser.
43      * @param id node id.
44      */
45     public ASTIntegerLiteral(Parser p, int id) {
46         super(p, id);
47     }
48
49     /** {@inheritDoc} */
50     public Object JavaDoc jjtAccept(ParserVisitor visitor, Object JavaDoc data) {
51         return visitor.visit(this, data);
52     }
53
54     /**
55      * Part of reference resolution - wierd... in JSTL EL you can have foo.2
56      * which is equiv to foo[2] it appears...
57      *
58      * @param obj the object to evaluate against.
59      * @param ctx the {@link JexlContext}.
60      * @throws Exception on any error.
61      * @return the resulting value.
62      * @see ASTArrayAccess#evaluateExpr(Object, Object)
63      */
64     public Object JavaDoc execute(Object JavaDoc obj, JexlContext ctx) throws Exception JavaDoc {
65         return ASTArrayAccess.evaluateExpr(obj, val);
66     }
67
68     /** {@inheritDoc} */
69     public Object JavaDoc value(JexlContext jc) throws Exception JavaDoc {
70         return val;
71     }
72 }
73
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