1 /*
2 * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 package net.sf.zel.instr.var;
20
21 import net.sf.zel.instr.*;
22 import net.sf.zel.vm.*;
23 import java.util.*;
24 import net.sf.zel.nr.OperableInteger;
25
26
27
28 public final class COUNT extends Instruction
29 {
30
31 /**
32 * instance
33 */
34 public static final Instruction instance = new COUNT();
35
36 private static final long serialVersionUID = 3806659275392364719L;
37
38 private COUNT(){};
39
40 /**
41 * RCount Instruction microcode :-)
42 * @param context ExecutionContext
43 * @throws ZExecutionException
44 */
45 public void execute(ExecutionContext context) throws ZExecutionException
46 {
47 final MatchIterator iterator = new MatchIterator((String) context.popSyncStackVal());
48 context.stack.pop();
49
50 Counter stuff = new Counter();
51 iterator.iterate(stuff, context.memContext);
52
53 context.stack.push(new OperableInteger(stuff.count));
54 context.ip++;
55 }
56
57 private class Counter implements MatchIterator.DoStuff
58 {
59
60 public int count = 0;
61
62 public void execute(Object obj, List context)
63 {
64 count++;
65 }
66 }
67 }