Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/HgDataFile.java @ 37:e45e75e22523

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Parse changesets from bundle's changelog group. Refactor Revlog to provide access to revision's raw content
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 14 Jan 2011 00:49:58 +0100
parents 603806cd2dc6
children e34f90b9ded1
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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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 void history(Changeset.Inspector inspector) {
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45 if (!exists()) {
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46 throw new IllegalStateException("Can't get history of invalid repository file node");
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47 }
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48 final int[] commitRevisions = new int[content.revisionCount()];
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49 Revlog.Inspector insp = new Revlog.Inspector() {
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50 int count = 0;
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51
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52 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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53 commitRevisions[count++] = linkRevision;
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54 }
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55 };
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56 content.iterate(0, -1, false, insp);
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57 getRepo().getChangelog().range(inspector, commitRevisions);
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58 }
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59
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60 public void history(int start, int end, Changeset.Inspector i) {
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61 throw HgRepository.notImplemented();
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62 }
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63
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64 /**
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65 * XXX perhaps, return value Nodeid[2] and boolean needNodeids is better (and higher level) API for this query?
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66 *
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67 * @param revision - revision to query parents, or {@link HgRepository#TIP}
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68 * @param parentRevisions - int[2] to get local revision numbers of parents (e.g. {6, -1})
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69 * @param parent1 - byte[20] or null, if parent's nodeid is not needed
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70 * @param parent2 - byte[20] or null, if second parent's nodeid is not needed
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71 * @return
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72 */
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73 public void parents(int revision, int[] parentRevisions, byte[] parent1, byte[] parent2) {
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74 if (revision != TIP && !(revision >= 0 && revision < content.revisionCount())) {
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75 throw new IllegalArgumentException(String.valueOf(revision));
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76 }
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77 if (parentRevisions == null || parentRevisions.length < 2) {
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78 throw new IllegalArgumentException(String.valueOf(parentRevisions));
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79 }
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80 if (parent1 != null && parent1.length < 20) {
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81 throw new IllegalArgumentException(parent1.toString());
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82 }
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83 if (parent2 != null && parent2.length < 20) {
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84 throw new IllegalArgumentException(parent2.toString());
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85 }
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86 class ParentCollector implements Revlog.Inspector {
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87 public int p1 = -1;
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88 public int p2 = -1;
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89 public byte[] nodeid;
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90
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91 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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92 p1 = parent1Revision;
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93 p2 = parent2Revision;
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94 this.nodeid = new byte[20];
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95 // nodeid arg now comes in 32 byte from (as in file format description), however upper 12 bytes are zeros.
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96 System.arraycopy(nodeid, nodeid.length > 20 ? nodeid.length - 20 : 0, this.nodeid, 0, 20);
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97 }
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98 };
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99 ParentCollector pc = new ParentCollector();
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100 content.iterate(revision, revision, false, pc);
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101 parentRevisions[0] = pc.p1;
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102 parentRevisions[1] = pc.p2;
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103 if (parent1 != null) {
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104 if (parentRevisions[0] == -1) {
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105 Arrays.fill(parent1, 0, 20, (byte) 0);
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106 } else {
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107 content.iterate(parentRevisions[0], parentRevisions[0], false, pc);
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108 System.arraycopy(pc.nodeid, 0, parent1, 0, 20);
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109 }
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110 }
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111 if (parent2 != null) {
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112 if (parentRevisions[1] == -1) {
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113 Arrays.fill(parent2, 0, 20, (byte) 0);
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114 } else {
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115 content.iterate(parentRevisions[1], parentRevisions[1], false, pc);
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116 System.arraycopy(pc.nodeid, 0, parent2, 0, 20);
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117 }
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
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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
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2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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120 }