Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/ChangesetTransformer.java @ 287:ed6b74a58c66

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use FileInfo abstraction with necessary subset of File functionality instead of File to facilitate other effective file system iterators
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 07 Sep 2011 09:33:27 +0200
parents 41a778e3fd31
children a674b8590362
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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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18
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19 import java.util.Set;
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20
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21 import org.tmatesoft.hg.repo.HgChangelog;
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22 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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23 import org.tmatesoft.hg.repo.HgRepository;
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24 import org.tmatesoft.hg.repo.HgStatusCollector;
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25 import org.tmatesoft.hg.util.CancelSupport;
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26 import org.tmatesoft.hg.util.CancelledException;
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27 import org.tmatesoft.hg.util.PathPool;
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28 import org.tmatesoft.hg.util.PathRewrite;
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29 import org.tmatesoft.hg.util.ProgressSupport;
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30
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31 /**
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32 * Bridges {@link HgChangelog.RawChangeset} with high-level {@link HgChangeset} API
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33 * FIXME move to .internal
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 /*package-local*/ class ChangesetTransformer implements HgChangelog.Inspector {
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39 private final HgChangesetHandler handler;
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40 private final HgChangeset changeset;
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41 private final ProgressSupport progressHelper;
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42 private final CancelSupport cancelHelper;
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43 private Set<String> branches;
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44 private HgCallbackTargetException failure;
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45 private CancelledException cancellation;
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46
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47 // repo and delegate can't be null, parent walker can
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48 // ps and cs can't be null
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49 public ChangesetTransformer(HgRepository hgRepo, HgChangesetHandler delegate, HgChangelog.ParentWalker pw, ProgressSupport ps, CancelSupport cs) {
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50 if (hgRepo == null || delegate == null) {
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51 throw new IllegalArgumentException();
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52 }
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53 if (ps == null || cs == null) {
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54 throw new IllegalArgumentException();
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55 }
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56 HgStatusCollector statusCollector = new HgStatusCollector(hgRepo);
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57 // files listed in a changeset don't need their names to be rewritten (they are normalized already)
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58 PathPool pp = new PathPool(new PathRewrite.Empty());
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59 statusCollector.setPathPool(pp);
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60 changeset = new HgChangeset(statusCollector, pp);
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61 changeset.setParentHelper(pw);
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62 handler = delegate;
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63 cancelHelper = cs;
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64 progressHelper = ps;
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65 }
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66
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67 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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68 if (failure != null || cancellation != null) {
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69 return; // FIXME need a better way to stop iterating revlog
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70 }
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71 if (branches != null && !branches.contains(cset.branch())) {
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72 return;
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73 }
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74
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75 changeset.init(revisionNumber, nodeid, cset);
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76 try {
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77 handler.next(changeset);
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78 progressHelper.worked(1);
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79 cancelHelper.checkCancelled();
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80 } catch (RuntimeException ex) {
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81 failure = new HgCallbackTargetException(ex).setRevision(nodeid).setRevisionNumber(revisionNumber);
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82 } catch (CancelledException ex) {
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83 cancellation = ex;
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84 }
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85 }
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87 public void checkFailure() throws HgCallbackTargetException, CancelledException {
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88 if (failure != null) {
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89 HgCallbackTargetException toThrow = failure;
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90 failure = null; // just in (otherwise unexpected) case this instance would get reused
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91 throw toThrow;
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92 }
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93 if (cancellation != null) {
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94 CancelledException toThrow = cancellation;
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95 cancellation = null;
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96 throw toThrow;
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97 }
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98 }
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99
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100 public void limitBranches(Set<String> branches) {
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101 this.branches = branches;
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102 }
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103 }