Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgOutgoingCommand.java @ 196:e2115da4cf6a

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Pool objects to avoid memory polution with duplicates
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 18 Apr 2011 18:04:24 +0200
parents c9b305df0b89
children ffc5f6d59f7e
rev   line source
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1 /*
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2 * Copyright (c) 2011 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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19 import java.util.List;
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20 import java.util.Set;
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21 import java.util.TreeSet;
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23 import org.tmatesoft.hg.internal.RepositoryComparator;
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24 import org.tmatesoft.hg.repo.HgChangelog;
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25 import org.tmatesoft.hg.repo.HgRemoteRepository;
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26 import org.tmatesoft.hg.repo.HgRepository;
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27 import org.tmatesoft.hg.util.CancelledException;
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29 /**
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30 * Command to find out changes made in a local repository and missing at remote repository.
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31 *
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32 * @author Artem Tikhomirov
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33 * @author TMate Software Ltd.
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34 */
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35 public class HgOutgoingCommand {
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36
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37 private final HgRepository localRepo;
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38 private HgRemoteRepository remoteRepo;
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39 private boolean includeSubrepo;
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40 private RepositoryComparator comparator;
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41 private HgChangelog.ParentWalker parentHelper;
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42 private Set<String> branches;
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44 public HgOutgoingCommand(HgRepository hgRepo) {
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45 localRepo = hgRepo;
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46 }
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48 /**
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49 * @param hgRemote remoteRepository to compare against
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50 * @return <code>this</code> for convenience
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51 */
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52 public HgOutgoingCommand against(HgRemoteRepository hgRemote) {
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53 remoteRepo = hgRemote;
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54 comparator = null;
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55 return this;
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56 }
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57
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58 /**
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59 * Select specific branch to pull.
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60 * Multiple branch specification possible (changeset from any of these would be included in result).
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61 * Note, {@link #executeLite(Object)} does not respect this setting.
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62 *
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63 * @param branch - branch name, case-sensitive, non-null.
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64 * @return <code>this</code> for convenience
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65 * @throws IllegalArgumentException when branch argument is null
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66 */
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67 public HgOutgoingCommand branch(String branch) {
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68 if (branch == null) {
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69 throw new IllegalArgumentException();
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70 }
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71 if (branches == null) {
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72 branches = new TreeSet<String>();
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73 }
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74 branches.add(branch);
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75 return this;
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76 }
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78 /**
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79 * PLACEHOLDER, NOT IMPLEMENTED YET.
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80 *
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81 * @return <code>this</code> for convenience
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82 */
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83 public HgOutgoingCommand subrepo(boolean include) {
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84 includeSubrepo = include;
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85 throw HgRepository.notImplemented();
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86 }
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87
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88 /**
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89 * Lightweight check for outgoing changes.
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90 * Reported changes are from any branch (limits set by {@link #branch(String)} are not taken into account.
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91 *
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92 * @param context
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93 * @return list on local nodes known to be missing at remote server
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94 */
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95 public List<Nodeid> executeLite(Object context) throws HgException, CancelledException {
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96 return getComparator(context).getLocalOnlyRevisions();
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97 }
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98
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99 /**
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100 * Complete information about outgoing changes
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101 *
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102 * @param handler delegate to process changes
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103 */
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104 public void executeFull(final HgLogCommand.Handler handler) throws HgException, CancelledException {
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105 if (handler == null) {
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106 throw new IllegalArgumentException("Delegate can't be null");
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107 }
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108 ChangesetTransformer inspector = new ChangesetTransformer(localRepo, handler, getParentHelper());
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109 inspector.limitBranches(branches);
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110 getComparator(handler).visitLocalOnlyRevisions(inspector);
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111 }
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113 private RepositoryComparator getComparator(Object context) throws HgException, CancelledException {
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114 if (remoteRepo == null) {
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115 throw new IllegalArgumentException("Shall specify remote repository to compare against");
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116 }
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117 if (comparator == null) {
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118 comparator = new RepositoryComparator(getParentHelper(), remoteRepo);
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119 comparator.compare(context);
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120 }
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121 return comparator;
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122 }
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123
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124 private HgChangelog.ParentWalker getParentHelper() {
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125 if (parentHelper == null) {
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126 parentHelper = localRepo.getChangelog().new ParentWalker();
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127 parentHelper.init();
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128 }
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129 return parentHelper;
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130 }
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131
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132 }