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annotate 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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565
78a9e26e670d Refactor common code to initialize changelog revision for a command into standalone class
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1 /*
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2 * Copyright (c) 2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import static org.tmatesoft.hg.repo.HgRepository.BAD_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21
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22 import org.tmatesoft.hg.core.HgBadArgumentException;
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23 import org.tmatesoft.hg.core.Nodeid;
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24 import org.tmatesoft.hg.repo.HgInvalidRevisionException;
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25 import org.tmatesoft.hg.repo.HgRepository;
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26
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27 /**
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28 * Common code to keep changelog revision and to perform boundary check.
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29 *
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30 * @author Artem Tikhomirov
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31 * @author TMate Software Ltd.
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32 */
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33 public class CsetParamKeeper {
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34 private final HgRepository repo;
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35 private int changelogRevisionIndex = HgRepository.BAD_REVISION;
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36
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37 public CsetParamKeeper(HgRepository hgRepo) {
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38 repo = hgRepo;
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39 }
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40
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41 public CsetParamKeeper set(Nodeid changeset) throws HgBadArgumentException {
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42 try {
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43 set(repo.getChangelog().getRevisionIndex(changeset));
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44 } catch (HgInvalidRevisionException ex) {
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45 throw new HgBadArgumentException("Can't find revision", ex).setRevision(changeset);
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46 }
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47 return this;
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48 }
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49
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50 public CsetParamKeeper set(int changelogRevIndex) throws HgBadArgumentException {
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51 int lastCsetIndex = repo.getChangelog().getLastRevision();
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52 if (changelogRevIndex == HgRepository.TIP) {
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53 changelogRevIndex = lastCsetIndex;
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54 }
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55 if (changelogRevIndex < 0 || changelogRevIndex > lastCsetIndex) {
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56 throw new HgBadArgumentException(String.format("Bad revision index %d, value from [0..%d] expected", changelogRevIndex, lastCsetIndex), null).setRevisionIndex(changelogRevIndex);
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57 }
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58 doSet(changelogRevIndex);
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59 return this;
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60 }
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61
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62 public void doSet(int changelogRevIndex) {
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63 changelogRevisionIndex = changelogRevIndex;
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64 }
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65
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66 /**
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67 * @return the value set, or {@link HgRepository#BAD_REVISION} otherwise
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68 */
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69 public int get() {
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70 return changelogRevisionIndex;
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71 }
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72
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73 /**
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74 * @param defaultRevisionIndex value to return when no revision was set, may be {@link HgRepository#TIP} which gets translated to real index if used
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75 * @return changelog revision index if set, or defaultRevisionIndex value otherwise
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76 */
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77 public int get(int defaultRevisionIndex) {
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78 // XXX perhaps, shall translate other predefined constants (like WORKING COPY) here, too (e.g. for HgRevertCommand)
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79 if (changelogRevisionIndex != BAD_REVISION || changelogRevisionIndex != TIP) {
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80 return changelogRevisionIndex;
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81 }
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82 if (changelogRevisionIndex == TIP || defaultRevisionIndex == TIP) {
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83 return repo.getChangelog().getLastRevision();
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84 }
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85 return defaultRevisionIndex;
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86 }
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87 }