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;
20
21 import net.sf.zel.vm.*;
22 import java.util.*;
23
24 /**
25 * <p>Title: CTX</p>
26 * <p>Description: Change memory context </p>
27 */
28 public final class CTX extends Instruction
29 {
30 private static final long serialVersionUID = -2038340683156544765L;
31
32 private CTX(){};
33
34 /**
35 * Change memory context with the context found on the stack
36 * @param context ExecutionContext
37 * @throws ZExecutionException
38 */
39 public void execute(ExecutionContext context) throws ZExecutionException
40 {
41 context.memContext = (Map) context.stack.pop();
42 context.ip++;
43 }
44 /**
45 * instance
46 */
47 public static final Instruction instance = new CTX();
48 }