01: /*
02: * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
03: * for visualizing and manipulating spatial features with geometry and attributes.
04: *
05: * Copyright (C) 2003 Vivid Solutions
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * as published by the Free Software Foundation; either version 2
10: * of the License, or (at your option) 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: * For more information, contact:
22: *
23: * Vivid Solutions
24: * Suite #1A
25: * 2328 Government Street
26: * Victoria BC V8T 5G5
27: * Canada
28: *
29: * (250)385-6040
30: * www.vividsolutions.com
31: */
32: package com.vividsolutions.jump.util;
33:
34: /**
35: * Simply a chunk of code that can be passed around. Facilitates
36: * Smalltalk-like programming. Also useful as a "lexical closure"
37: * i.e. a chunk of code with variables having long lifetimes.
38: * <p>
39: * Typically only one of the #yield methods needs to be implemented.
40: * Which one depends on the context.
41: */
42: public abstract class Block {
43: public Object yield(Object arg1, Object arg2) {
44: throw new UnsupportedOperationException();
45: }
46:
47: public Object yield(Object arg) {
48: throw new UnsupportedOperationException();
49: }
50:
51: public Object yield() {
52: throw new UnsupportedOperationException();
53: }
54: }
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