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Java > Open Source Codes > org > apache > hivemind > conditional > TokenType


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.conditional;
16
17 /**
18  * Used by {@link Token} to identify the type of token.
19  *
20  * @author Howard M. Lewis Ship
21  * @since 1.1
22  */
23 class TokenType
24 {
25     /**
26      * An open parenthesis.
27      */
28
29     static final TokenType OPAREN = new TokenType("OPAREN");
30
31     /**
32      * A close parenthesis.
33      */
34
35     static final TokenType CPAREN = new TokenType("CPAREN");
36
37     /**
38      * The keyword "and"
39      */
40
41     static final TokenType AND = new TokenType("AND");
42
43     /**
44      * The keyword "or"
45      */
46
47     static final TokenType OR = new TokenType("OR");
48
49     /**
50      * The keyword "not"
51      */
52
53     static final TokenType NOT = new TokenType("NOT");
54
55     /**
56      * The keyword "property"
57      */
58
59     static final TokenType PROPERTY = new TokenType("PROPERTY");
60
61     /**
62      * The keyword "class"
63      */
64
65     static final TokenType CLASS = new TokenType("CLASS");
66
67     /**
68      * A symbol.
69      */
70
71     static final TokenType SYMBOL = new TokenType("SYMBOL");
72
73     private String JavaDoc _name;
74
75     private TokenType(String JavaDoc name)
76     {
77         _name = name;
78     }
79
80     public String JavaDoc toString()
81     {
82         return _name;
83     }
84 }
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