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comparison src/org/tmatesoft/hg/core/HgAbstractCommand.java @ 215:41a778e3fd31

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Issue 5: Facilities for progress and cancellation. More specific exceptions. Exceptions from callbacks as RuntimeException
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 17 May 2011 00:56:54 +0200
parents
children d68dcb3b5f49
comparison
equal deleted inserted replaced
214:4252faa556cd 215:41a778e3fd31
1 /*
2 * Copyright (c) 2011 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.core;
18
19 import org.tmatesoft.hg.util.CancelSupport;
20 import org.tmatesoft.hg.util.ProgressSupport;
21
22 /**
23 * intentionally package-local, might be removed or refactored in future
24 *
25 * @author Artem Tikhomirov
26 * @author TMate Software Ltd.
27 */
28 class HgAbstractCommand<T extends HgAbstractCommand<?>> implements ProgressSupport.Target<T>, CancelSupport.Target<T> {
29 private ProgressSupport progressHelper;
30 private CancelSupport cancelHelper;
31
32 @SuppressWarnings("unchecked")
33 public T set(ProgressSupport ps) {
34 progressHelper = ps;
35 return (T) this;
36 }
37
38 @SuppressWarnings("unchecked")
39 public T set(CancelSupport cs) {
40 cancelHelper = cs;
41 return (T) this;
42 }
43
44 // shall not return null
45 protected ProgressSupport getProgressSupport(Object context) {
46 if (progressHelper != null) {
47 return progressHelper;
48 }
49 return ProgressSupport.Factory.get(context);
50 }
51
52 // shall not return null
53 protected CancelSupport getCancelSupport(Object context) {
54 if (cancelHelper != null) {
55 return cancelHelper;
56 }
57 return CancelSupport.Factory.get(context);
58 }
59
60 }