1 /* Reattore HTTP Server
2
3 Copyright (C) 2002 Michael Hope <michaelh@juju.net.nz>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 $Id: Variable.java,v 1.2 2003/03/03 05:14:39 michaelh Exp $
20 */
21
22 package juju.reattore.perfcap.var;
23
24 /*** An independant variable that takes on a set of values. Modeled
25 after Iterator.
26 */
27 public interface Variable {
28
29 /*** The name of this variable.
30
31 @return The name.
32 */
33 String getName();
34
35 /*** The current value of this variable. May be called many
36 times.
37
38 @return The current value.
39 */
40 Object getValue();
41
42 /*** Returns true if there are more values in this sequence.
43
44 @return true if more are available.
45 @throws Exception on error.
46 */
47 boolean hasNext()
48 throws Exception;
49
50 /*** Advances to the next value. #getValue is not valid until this
51 is called.
52
53 @throws Exception on error.
54 */
55 void next()
56 throws Exception;
57
58 /*** Initialises and resets this variable.
59
60 @throws Exception on error.
61 */
62 void begin()
63 throws Exception;
64
65 /*** Called when done with this variable.
66
67 @throws Exception on error.
68 */
69 void end()
70 throws Exception;
71 }
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