1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2000-2001,2003 (C) Exoffice Technologies Inc. All Rights Reserved.
42 */
43
44 package org.exolab.jms.selector.parser;
45
46 import antlr.CommonAST;
47 import antlr.CommonToken;
48 import antlr.Token;
49 import org.exolab.jms.selector.Context;
50 import org.exolab.jms.selector.Type;
51
52
53 /***
54 * Selector AST node. This adds expression type and context information used
55 * by the tree parser to validate expressions.
56 *
57 * @version $Revision: 1.1 $ $Date: 2004/11/26 01:50:45 $
58 * @author <a href="mailto:tima@intalio.com">Tim Anderson</a>
59 * @see Context
60 * @see SelectorParser
61 * @see SelectorTreeParser
62 * @see Type
63 */
64 public class SelectorAST extends CommonAST {
65
66 /***
67 * The return type
68 */
69 private Type _type;
70
71 /***
72 * The context of the node
73 */
74 private Context _context;
75
76
77 /***
78 * Construct a new <code>SelectorAST</code>
79 */
80 public SelectorAST() {
81 _type = Type.UNDEFINED;
82 }
83
84 /***
85 * Initialise this with a token
86 *
87 * @param token the token
88 */
89 public void initialize(final Token token) {
90 super.initialize(token);
91 _context = new Context(((CommonToken) token).getLine(),
92 ((CommonToken) token).getColumn());
93 }
94
95 /***
96 * Sets the return type of the expression
97 *
98 * @param type the return type
99 */
100 public void setReturnType(final Type type) {
101 _type = type;
102 }
103
104 /***
105 * Returns the return type of the expression
106 *
107 * @return the return type of the expression
108 */
109 public Type getReturnType() {
110 return _type;
111 }
112
113 /***
114 * Returns the context of the expression
115 *
116 * @return the context of the expression
117 */
118 public Context getContext() {
119 return _context;
120 }
121
122 }