Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/IterateControlMediator.java @ 608:e1b29756f901

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 07 May 2013 21:27:51 +0200
parents 1ee452f31187
children
rev   line source
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
2 * Copyright (c) 2011-2012 TMate Software Ltd
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import org.tmatesoft.hg.internal.Lifecycle.Callback;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import org.tmatesoft.hg.util.CancelSupport;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21 import org.tmatesoft.hg.util.CancelledException;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 /**
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24 *
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 * @author Artem Tikhomirov
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 * @author TMate Software Ltd.
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27 */
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 public class IterateControlMediator {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 private final CancelSupport src;
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
31 private final Callback receiver;
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
32 private CancelledException cancellation;
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 public IterateControlMediator(CancelSupport source, Lifecycle.Callback target) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 assert target != null;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
36 src = source;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
37 receiver = target;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
38 }
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
39
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 public boolean checkCancelled() {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41 if (src == null) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
42 return false;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43 }
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
44 if (cancellation != null) {
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
45 return true;
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
46 }
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
47 try {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48 src.checkCancelled();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
49 return false;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
50 } catch (CancelledException ex) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
51 receiver.stop();
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
52 cancellation = ex;
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53 return true;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
54 }
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
55 }
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
56
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 public void stop() {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
58 receiver.stop();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
59 }
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
60
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
61 public CancelledException getCancelException() {
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
62 return cancellation;
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
63 }
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
64 }