Mercurial > jhg

annotate src/org/tmatesoft/hg/core/ChangesetTransformer.java @ 543:1e95f48d9886

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Report line index for insertion and deletion, test against 'hg diff' output
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 15 Feb 2013 15:52:03 +0100
parents 1ee452f31187
children 6526d8adbc0f
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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.core;
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18
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19 import java.util.Set;
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20
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21 import org.tmatesoft.hg.internal.Lifecycle;
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22 import org.tmatesoft.hg.internal.LifecycleBridge;
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23 import org.tmatesoft.hg.internal.PathPool;
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24 import org.tmatesoft.hg.repo.HgChangelog;
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25 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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26 import org.tmatesoft.hg.repo.HgRepository;
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27 import org.tmatesoft.hg.repo.HgStatusCollector;
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28 import org.tmatesoft.hg.repo.HgParentChildMap;
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29 import org.tmatesoft.hg.util.Adaptable;
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30 import org.tmatesoft.hg.util.CancelSupport;
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31 import org.tmatesoft.hg.util.CancelledException;
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32 import org.tmatesoft.hg.util.PathRewrite;
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33 import org.tmatesoft.hg.util.ProgressSupport;
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34
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35 /**
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36 * Bridges {@link HgChangelog.RawChangeset} with high-level {@link HgChangeset} API
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37 * TODO post-1.0 Move to .internal once access to package-local HgChangeset cons is resolved. For 1.0, enough it's package-local
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38 *
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39 * @author Artem Tikhomirov
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40 * @author TMate Software Ltd.
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41 */
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42 /*package-local*/ class ChangesetTransformer implements HgChangelog.Inspector, Adaptable {
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43 private final HgChangesetHandler handler;
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44 private final LifecycleBridge lifecycleBridge;
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45 private final Transformation t;
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46 private Set<String> branches;
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47 private HgCallbackTargetException failure;
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48
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49 // repo and delegate can't be null, parent walker can
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50 // ps and cs can't be null
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51 public ChangesetTransformer(HgRepository hgRepo, HgChangesetHandler delegate, HgParentChildMap<HgChangelog> pw, ProgressSupport ps, CancelSupport cs) {
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52 if (hgRepo == null || delegate == null) {
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53 throw new IllegalArgumentException();
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54 }
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55 if (ps == null || cs == null) {
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56 throw new IllegalArgumentException();
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57 }
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58 HgStatusCollector statusCollector = new HgStatusCollector(hgRepo);
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59 t = new Transformation(statusCollector, pw);
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60 handler = delegate;
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61 // lifecycleBridge takes care of progress and cancellation, plus
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62 // gives us explicit way to stop iteration (once HgCallbackTargetException) comes.
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63 lifecycleBridge = new LifecycleBridge(ps, cs);
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64 }
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65
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66 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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67 if (branches != null && !branches.contains(cset.branch())) {
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68 return;
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69 }
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70
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71 HgChangeset changeset = t.handle(revisionNumber, nodeid, cset);
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72 try {
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73 handler.cset(changeset);
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74 lifecycleBridge.nextStep();
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75 } catch (HgCallbackTargetException ex) {
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76 failure = ex.setRevision(nodeid).setRevisionIndex(revisionNumber);
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77 lifecycleBridge.stop();
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78 }
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79 }
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81 public void checkFailure() throws HgCallbackTargetException, CancelledException {
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82 if (failure != null) {
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83 HgCallbackTargetException toThrow = failure;
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84 throw toThrow;
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85 }
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86 if (lifecycleBridge.isCancelled()) {
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87 CancelledException toThrow = lifecycleBridge.getCancelOrigin();
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88 assert toThrow != null;
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89 throw toThrow;
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90 }
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91 }
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92
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93 public void limitBranches(Set<String> branches) {
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94 this.branches = branches;
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95 }
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97 // part relevant to RawChangeset->HgChangeset transformation
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98 static class Transformation {
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99 private final HgChangeset changeset;
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100
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101 public Transformation(HgStatusCollector statusCollector, HgParentChildMap<HgChangelog> pw) {
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102 // files listed in a changeset don't need their names to be rewritten (they are normalized already)
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103 // pp serves as a cache for all filenames encountered and as a source for Path listed in the changeset
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104 PathPool pp = new PathPool(new PathRewrite.Empty());
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105 statusCollector.setPathPool(pp);
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106 changeset = new HgChangeset(statusCollector, pp);
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107 changeset.setParentHelper(pw);
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108 }
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110 /**
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111 * Callers shall not assume they get new HgChangeset instance each time, implementation may reuse instances.
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112 * @return hi-level changeset description
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113 */
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114 HgChangeset handle(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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115 changeset.init(revisionNumber, nodeid, cset);
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116 return changeset;
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117 }
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118 }
423
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119
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120 public <T> T getAdapter(Class<T> adapterClass) {
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121 if (adapterClass == Lifecycle.class) {
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122 return adapterClass.cast(lifecycleBridge);
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123 }
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124 // just in case there are more adapters in future
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125 return Adaptable.Factory.getAdapter(handler, adapterClass, null);
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126 }
192
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127 }