Mercurial > jhg

annotate src/org/tmatesoft/hg/core/ChangesetTransformer.java @ 256:b61ed0f2c4da

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Yet another slight perf/mem improvement for the tags per file sample
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 16 Aug 2011 15:45:47 +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 }