Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/HgDataFile.java @ 30:de7217a0aa4d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Look up changes in the local repo that are not in the remote
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 11 Jan 2011 04:49:06 +0100
parents 603806cd2dc6
children e45e75e22523
rev   line source
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1 /*
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2 * Copyright (c) 2010, 2011 Artem Tikhomirov
2
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3 */
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4 package com.tmate.hgkit.ll;
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5
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6 import static com.tmate.hgkit.ll.HgRepository.TIP;
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7
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8 import java.util.Arrays;
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9
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10 /**
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11 * Extends Revlog/uses RevlogStream?
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12 * ? name:HgFileNode?
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13 * @author artem
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14 */
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15 public class HgDataFile extends Revlog {
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16
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17 // absolute from repo root?
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18 // slashes, unix-style?
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19 // repo location agnostic, just to give info to user, not to access real storage
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20 private final String path;
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22 /*package-local*/HgDataFile(HgRepository hgRepo, String path, RevlogStream content) {
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23 super(hgRepo, content);
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24 this.path = path;
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25 }
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26
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27 public boolean exists() {
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28 return content != null; // XXX need better impl
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29 }
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30
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31 public String getPath() {
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32 return path; // hgRepo.backresolve(this) -> name?
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33 }
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34
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35 public int length(Nodeid nodeid) {
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36 int revision = content.findLocalRevisionNumber(nodeid);
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37 return content.dataLength(revision);
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38 }
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39
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40 public byte[] content() {
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41 return content(TIP);
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42 }
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43
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44 public byte[] content(Nodeid nodeid) {
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45 int revision = content.findLocalRevisionNumber(nodeid);
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46 return content(revision);
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47 }
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48
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49 /**
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50 * @param revision - repo-local index of this file change (not a changelog revision number!)
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51 */
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52 public byte[] content(int revision) {
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53 final byte[][] dataPtr = new byte[1][];
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54 Revlog.Inspector insp = new Revlog.Inspector() {
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55 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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56 dataPtr[0] = data;
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57 }
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58 };
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59 content.iterate(revision, revision, true, insp);
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60 return dataPtr[0];
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61 }
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62
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63 public void history(Changeset.Inspector inspector) {
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64 if (!exists()) {
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65 throw new IllegalStateException("Can't get history of invalid repository file node");
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66 }
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67 final int[] commitRevisions = new int[content.revisionCount()];
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68 Revlog.Inspector insp = new Revlog.Inspector() {
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69 int count = 0;
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70
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71 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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72 commitRevisions[count++] = linkRevision;
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73 }
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74 };
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75 content.iterate(0, -1, false, insp);
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76 getRepo().getChangelog().range(inspector, commitRevisions);
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77 }
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78
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79 public void history(int start, int end, Changeset.Inspector i) {
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80 throw HgRepository.notImplemented();
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81 }
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82
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83 /**
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84 * XXX perhaps, return value Nodeid[2] and boolean needNodeids is better (and higher level) API for this query?
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85 *
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86 * @param revision - revision to query parents, or {@link HgRepository#TIP}
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87 * @param parentRevisions - int[2] to get local revision numbers of parents (e.g. {6, -1})
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88 * @param parent1 - byte[20] or null, if parent's nodeid is not needed
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89 * @param parent2 - byte[20] or null, if second parent's nodeid is not needed
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90 * @return
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91 */
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92 public void parents(int revision, int[] parentRevisions, byte[] parent1, byte[] parent2) {
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93 if (revision != TIP && !(revision >= 0 && revision < content.revisionCount())) {
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94 throw new IllegalArgumentException(String.valueOf(revision));
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95 }
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96 if (parentRevisions == null || parentRevisions.length < 2) {
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97 throw new IllegalArgumentException(String.valueOf(parentRevisions));
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98 }
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99 if (parent1 != null && parent1.length < 20) {
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100 throw new IllegalArgumentException(parent1.toString());
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101 }
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102 if (parent2 != null && parent2.length < 20) {
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103 throw new IllegalArgumentException(parent2.toString());
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104 }
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105 class ParentCollector implements Revlog.Inspector {
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106 public int p1 = -1;
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107 public int p2 = -1;
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108 public byte[] nodeid;
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109
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110 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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111 p1 = parent1Revision;
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112 p2 = parent2Revision;
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113 this.nodeid = new byte[20];
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114 // nodeid arg now comes in 32 byte from (as in file format description), however upper 12 bytes are zeros.
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115 System.arraycopy(nodeid, nodeid.length > 20 ? nodeid.length - 20 : 0, this.nodeid, 0, 20);
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116 }
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117 };
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118 ParentCollector pc = new ParentCollector();
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119 content.iterate(revision, revision, false, pc);
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120 parentRevisions[0] = pc.p1;
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
121 parentRevisions[1] = pc.p2;
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
122 if (parent1 != null) {
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
123 if (parentRevisions[0] == -1) {
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
124 Arrays.fill(parent1, 0, 20, (byte) 0);
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
125 } else {
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
126 content.iterate(parentRevisions[0], parentRevisions[0], false, pc);
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
127 System.arraycopy(pc.nodeid, 0, parent1, 0, 20);
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
128 }
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
129 }
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
130 if (parent2 != null) {
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
131 if (parentRevisions[1] == -1) {
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
132 Arrays.fill(parent2, 0, 20, (byte) 0);
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
133 } else {
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
134 content.iterate(parentRevisions[1], parentRevisions[1], false, pc);
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
135 System.arraycopy(pc.nodeid, 0, parent2, 0, 20);
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
136 }
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
137 }
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
138 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
139 }