1 package org.apache.velocity.runtime.parser.node;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.math.BigInteger;
23
24 import org.apache.velocity.context.InternalContextAdapter;
25 import org.apache.velocity.exception.TemplateInitException;
26 import org.apache.velocity.runtime.parser.Parser;
27
28 /**
29 * Handles integer numbers. The value will be either an Integer, a Long, or a BigInteger.
30 *
31 * @author <a href="mailto:wglass@forio.com">Will Glass-Husain</a>
32 * @since 1.5
33 */
34 public class ASTIntegerLiteral extends SimpleNode
35 {
36
37 // This may be of type Integer, Long or BigInteger
38 private Number value = null;
39
40 /**
41 * @param id
42 */
43 public ASTIntegerLiteral(int id)
44 {
45 super(id);
46 }
47
48 /**
49 * @param p
50 * @param id
51 */
52 public ASTIntegerLiteral(Parser p, int id)
53 {
54 super(p, id);
55 }
56
57
58 /**
59 * @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.node.ParserVisitor, java.lang.Object)
60 */
61 public Object jjtAccept(ParserVisitor visitor, Object data)
62 {
63 return visitor.visit(this, data);
64 }
65
66 /**
67 * @see org.apache.velocity.runtime.parser.node.SimpleNode#init(org.apache.velocity.context.InternalContextAdapter, java.lang.Object)
68 */
69 public Object init( InternalContextAdapter context, Object data)
70 throws TemplateInitException
71 {
72 /*
73 * init the tree correctly
74 */
75
76 super.init( context, data );
77
78 /**
79 * Determine the size of the item and make it an Integer, Long, or BigInteger as appropriate.
80 */
81 String str = getFirstToken().image;
82 try
83 {
84 value = new Integer( str );
85 }
86 catch ( NumberFormatException E1 )
87 {
88 try
89 {
90
91 value = new Long( str );
92
93 }
94 catch ( NumberFormatException E2 )
95 {
96
97 // if there's still an Exception it will propogate out
98 value = new BigInteger( str );
99 }
100 }
101
102 return data;
103 }
104
105 /**
106 * @see org.apache.velocity.runtime.parser.node.SimpleNode#value(org.apache.velocity.context.InternalContextAdapter)
107 */
108 public Object value( InternalContextAdapter context)
109 {
110 return value;
111 }
112
113 }