Source code: org/jext/dawn/array/ElementAtFunction.java
1 /*
2 * ElementAtFunction.java - element at
3 * Copyright (C) 2000 Romain Guy
4 * romain.guy@jext.org
5 * http://www.jext.org
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22 package org.jext.dawn.array;
23
24 import org.jext.dawn.*;
25
26 /**
27 * Returns the element stored at the given index of an array.<br>
28 * Usage:<br>
29 * <code>array index elementAt</code><br>
30 * This function then pushes both the array and the object on the stack.
31 * @author Romain Guy
32 */
33
34 public class ElementAtFunction extends Function
35 {
36 public ElementAtFunction()
37 {
38 super("elementAt");
39 }
40
41 public void invoke(DawnParser parser) throws DawnRuntimeException
42 {
43 parser.checkArgsNumber(this, 2);
44 int index = (int) parser.popNumber();
45
46 try
47 {
48 parser.push(parser.peekArray().elementAt(index));
49 } catch (ArrayIndexOutOfBoundsException aioobe) {
50 throw new DawnRuntimeException(this, parser, "array index " + index + " out of bounds");
51 }
52 }
53 }
54
55 // End of ElementAtFunction.java