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annotate src/org/tmatesoft/hg/core/HgFileRevision.java @ 322:d68dcb3b5f49

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Propagate command's CancelSupport to low-level API. CancelSupport from context got priority over one from command
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 30 Sep 2011 08:00:04 +0200
parents ee6b467c1a5f
children 58725dd511b3
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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 org.tmatesoft.hg.repo.HgDataFile;
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20 import org.tmatesoft.hg.repo.HgInternals;
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21 import org.tmatesoft.hg.repo.HgRepository;
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22 import org.tmatesoft.hg.util.ByteChannel;
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23 import org.tmatesoft.hg.util.CancelledException;
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24 import org.tmatesoft.hg.util.Path;
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25
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26 /**
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27 * Keeps together information about specific file revision
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28 *
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29 * @author Artem Tikhomirov
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30 * @author TMate Software Ltd.
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31 */
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32 public final class HgFileRevision {
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33 private final HgRepository repo;
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34 private final Nodeid revision;
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35 private final Path path;
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36 private Path origin;
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37 private Boolean isCopy = null; // null means not yet known
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38
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39 public HgFileRevision(HgRepository hgRepo, Nodeid rev, Path p) {
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40 if (hgRepo == null || rev == null || p == null) {
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41 // since it's package local, it is our code to blame for non validated arguments
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42 throw new IllegalArgumentException();
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43 }
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44 repo = hgRepo;
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45 revision = rev;
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46 path = p;
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47 }
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48
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49 // this cons shall be used when we know whether p was a copy. Perhaps, shall pass Map<Path,Path> instead to stress orig argument is not optional
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50 HgFileRevision(HgRepository hgRepo, Nodeid rev, Path p, Path orig) {
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51 this(hgRepo, rev, p);
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52 isCopy = Boolean.valueOf(orig == null);
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53 origin = orig;
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54 }
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55
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56 public Path getPath() {
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57 return path;
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58 }
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59 public Nodeid getRevision() {
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60 return revision;
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61 }
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62 public boolean wasCopied() {
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63 if (isCopy == null) {
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64 checkCopy();
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65 }
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66 return isCopy.booleanValue();
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67 }
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68 /**
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69 * @return <code>null</code> if {@link #wasCopied()} is <code>false</code>, name of the copy source otherwise.
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70 */
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71 public Path getOriginIfCopy() {
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72 if (wasCopied()) {
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73 return origin;
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74 }
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75 return null;
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76 }
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77
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78 public void putContentTo(ByteChannel sink) throws HgDataStreamException, CancelledException {
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79 HgDataFile fn = repo.getFileNode(path);
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80 int localRevision = fn.getLocalRevision(revision);
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81 fn.contentWithFilters(localRevision, sink);
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82 }
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83
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84 private void checkCopy() {
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85 HgDataFile fn = repo.getFileNode(path);
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86 try {
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87 if (fn.isCopy()) {
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88 if (fn.getRevision(0).equals(revision)) {
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89 // this HgFileRevision represents first revision of the copy
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90 isCopy = Boolean.TRUE;
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91 origin = fn.getCopySourceName();
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92 return;
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93 }
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94 }
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95 } catch (HgDataStreamException ex) {
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96 HgInternals.getContext(repo).getLog().error(getClass(), ex, null);
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97 }
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98 isCopy = Boolean.FALSE;
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99 }
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100 }