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Java > Open Source Codes > org > mr > api > jms > selector > parser > SelectorAST


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
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5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Coridan.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
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22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
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29  * License and not to allow others to use your version of this file under
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32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */
46 package org.mr.api.jms.selector.parser;
47
48 import antlr.CommonAST;
49 import antlr.CommonToken;
50 import antlr.Token;
51
52 import org.mr.api.jms.selector.syntax.Context;
53 import org.mr.api.jms.selector.syntax.Type;
54
55
56 /**
57  * Selector AST node. This adds expression type and context information used
58  * by the tree parser to validate expressions.
59  *
60  */
61 public class SelectorAST extends CommonAST {
62
63     /**
64      * The return type
65      */
66     private Type type;
67
68     /**
69      * The context of the node
70      */
71     private Context context;
72
73
74     /**
75      * Construct a new <code>SelectorAST</code>
76      */
77     public SelectorAST() {
78         type = Type.UNDEFINED;
79     }//SelectorAST
80
81     /**
82      * Initialise this with a token
83      *
84      * @param token the token
85      */
86     public void initialize(final Token token) {
87         super.initialize(token);
88         context = new Context(((CommonToken) token).getLine(), ((CommonToken) token).getColumn());
89     }//initialize
90
91     
92     /**
93      * Sets the return type of the expression
94      *
95      * @param type the return type
96      */
97     public void setReturnType(final Type type) {
98         this.type = type;
99     }//setReturnType
100
101     
102     /**
103      * Returns the return type of the expression
104      *
105      * @return the return type of the expression
106      */
107     public Type getReturnType() {
108         return type;
109     }//getReturnType
110
111     /**
112      * Returns the context of the expression
113      *
114      * @return the context of the expression
115      */
116     public Context getContext() {
117         return context;
118     }//getContext
119 }//SelectorAST
120
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