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comparison src/org/tmatesoft/hg/internal/CsetParamKeeper.java @ 565:78a9e26e670d

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Refactor common code to initialize changelog revision for a command into standalone class
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 09 Apr 2013 17:15:30 +0200
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children 6526d8adbc0f
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564:e6407313bab7 565:78a9e26e670d
1 /*
2 * Copyright (c) 2013 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.internal;
18
19 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
21
22 import org.tmatesoft.hg.core.HgBadArgumentException;
23 import org.tmatesoft.hg.core.Nodeid;
24 import org.tmatesoft.hg.repo.HgInvalidRevisionException;
25 import org.tmatesoft.hg.repo.HgRepository;
26
27 /**
28 * Common code to keep changelog revision and to perform boundary check.
29 *
30 * @author Artem Tikhomirov
31 * @author TMate Software Ltd.
32 */
33 public class CsetParamKeeper {
34 private final HgRepository repo;
35 private int changelogRevisionIndex = HgRepository.BAD_REVISION;
36
37 public CsetParamKeeper(HgRepository hgRepo) {
38 repo = hgRepo;
39 }
40
41 public CsetParamKeeper set(Nodeid changeset) throws HgBadArgumentException {
42 try {
43 set(repo.getChangelog().getRevisionIndex(changeset));
44 } catch (HgInvalidRevisionException ex) {
45 throw new HgBadArgumentException("Can't find revision", ex).setRevision(changeset);
46 }
47 return this;
48 }
49
50 public CsetParamKeeper set(int changelogRevIndex) throws HgBadArgumentException {
51 int lastCsetIndex = repo.getChangelog().getLastRevision();
52 if (changelogRevIndex == HgRepository.TIP) {
53 changelogRevIndex = lastCsetIndex;
54 }
55 if (changelogRevIndex < 0 || changelogRevIndex > lastCsetIndex) {
56 throw new HgBadArgumentException(String.format("Bad revision index %d, value from [0..%d] expected", changelogRevIndex, lastCsetIndex), null).setRevisionIndex(changelogRevIndex);
57 }
58 doSet(changelogRevIndex);
59 return this;
60 }
61
62 public void doSet(int changelogRevIndex) {
63 changelogRevisionIndex = changelogRevIndex;
64 }
65
66 /**
67 * @return the value set, or {@link HgRepository#BAD_REVISION} otherwise
68 */
69 public int get() {
70 return changelogRevisionIndex;
71 }
72
73 /**
74 * @param defaultRevisionIndex value to return when no revision was set, may be {@link HgRepository#TIP} which gets translated to real index if used
75 * @return changelog revision index if set, or defaultRevisionIndex value otherwise
76 */
77 public int get(int defaultRevisionIndex) {
78 // XXX perhaps, shall translate other predefined constants (like WORKING COPY) here, too (e.g. for HgRevertCommand)
79 if (changelogRevisionIndex != BAD_REVISION || changelogRevisionIndex != TIP) {
80 return changelogRevisionIndex;
81 }
82 if (changelogRevisionIndex == TIP || defaultRevisionIndex == TIP) {
83 return repo.getChangelog().getLastRevision();
84 }
85 return defaultRevisionIndex;
86 }
87 }