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.io.IOException;
23 import java.io.ObjectInputStream;
24
25
26 /**
27 * @author zoly
28 * @version 1.0
29 */
30 public final class IN extends Instruction
31 {
32 private static final long serialVersionUID = 8486583432881741964L;
33
34 private IN(){};
35
36 public void execute(ExecutionContext context) throws ZExecutionException
37 {
38 ObjectInputStream ois = null;
39 try
40 {
41 ois = new ObjectInputStream(context.in);
42 context.stack.push(ois.readObject());
43 context.ip++;
44 } catch (IOException ex)
45 {
46 throw new ZExecutionException("IO error when reading from input Stream", ex, context);
47 } catch (ClassNotFoundException ex)
48 {
49 throw new ZExecutionException("Unsupported object in stream", ex, context);
50 }
51 }
52 /**
53 * instance
54 */
55 public static final Instruction instance = new IN();
56
57 }