Mercurial > jhg

annotate src/com/tmate/hgkit/ll/Revlog.java @ 50:f1db8610da62

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Log to consult (placeholder, for now) class to find out associated tags
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 15 Jan 2011 01:41:49 +0100
parents 26e3eeaa3962
children 9429c7bd1920 576d6e8a09f6
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 java.util.Collection;
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7 import java.util.Collections;
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8 import java.util.HashMap;
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9 import java.util.LinkedHashSet;
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10 import java.util.Map;
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11 import java.util.Set;
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12
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13 /**
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14 *
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15 * @author artem
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16 */
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17 public abstract class Revlog {
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18
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19 private final HgRepository hgRepo;
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20 protected final RevlogStream content;
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22 protected Revlog(HgRepository hgRepo, RevlogStream content) {
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23 if (hgRepo == null) {
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24 throw new NullPointerException();
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25 }
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26 this.hgRepo = hgRepo;
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27 this.content = content;
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28 }
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30 public final HgRepository getRepo() {
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31 return hgRepo;
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32 }
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33
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34 public int getRevisionCount() {
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35 return content.revisionCount();
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36 }
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38 public int getLocalRevisionNumber(Nodeid nid) {
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39 int revision = content.findLocalRevisionNumber(nid);
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40 if (revision == Integer.MIN_VALUE) {
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41 throw new IllegalArgumentException(String.format("%s doesn't represent a revision of %s", nid.toString(), this /*XXX HgDataFile.getPath might be more suitable here*/));
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42 }
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43 return revision;
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44 }
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45
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46 // Till now, i follow approach that NULL nodeid is never part of revlog
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47 public boolean isKnown(Nodeid nodeid) {
49
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48 final int rn = content.findLocalRevisionNumber(nodeid);
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49 if (Integer.MIN_VALUE == rn) {
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50 return false;
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51 }
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52 if (rn < 0 || rn >= content.revisionCount()) {
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53 // Sanity check
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54 throw new IllegalStateException();
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55 }
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56 return true;
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57 }
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59 /**
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60 * Access to revision data as is (decompressed, but otherwise unprocessed, i.e. not parsed for e.g. changeset or manifest entries)
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61 * @param nodeid
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62 */
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63 public byte[] content(Nodeid nodeid) {
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64 return content(getLocalRevisionNumber(nodeid));
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65 }
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67 /**
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68 * @param revision - repo-local index of this file change (not a changelog revision number!)
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69 */
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70 public byte[] content(int revision) {
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71 final byte[][] dataPtr = new byte[1][];
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72 Revlog.Inspector insp = new Revlog.Inspector() {
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73 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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74 dataPtr[0] = data;
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75 }
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76 };
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77 content.iterate(revision, revision, true, insp);
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78 return dataPtr[0];
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79 }
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80
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81 // FIXME byte[] data might be too expensive, for few usecases it may be better to have intermediate Access object (when we don't need full data
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82 // instantly - e.g. calculate hash, or comparing two revisions
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83 // XXX seems that RevlogStream is better place for this class.
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84 public interface Inspector {
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85 // XXX boolean retVal to indicate whether to continue?
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86 // TODO specify nodeid and data length, and reuse policy (i.e. if revlog stream doesn't reuse nodeid[] for each call)
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87 void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[/*20*/] nodeid, byte[] data);
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88 }
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89
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90 /*
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91 * XXX think over if it's better to do either:
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92 * pw = getChangelog().new ParentWalker(); pw.init() and pass pw instance around as needed
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93 * or
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94 * add Revlog#getParentWalker(), static class, make cons() and #init package-local, and keep SoftReference to allow walker reuse.
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95 *
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96 * and yes, walker is not a proper name
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97 */
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98 public final class ParentWalker {
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99 private Map<Nodeid, Nodeid> firstParent;
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100 private Map<Nodeid, Nodeid> secondParent;
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101 private Set<Nodeid> allNodes;
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102
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103 public ParentWalker() {
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104 firstParent = secondParent = Collections.emptyMap();
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105 allNodes = Collections.emptySet();
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106 }
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107
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108 public void init() {
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109 final RevlogStream stream = Revlog.this.content;
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110 final int revisionCount = stream.revisionCount();
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111 firstParent = new HashMap<Nodeid, Nodeid>(revisionCount);
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112 secondParent = new HashMap<Nodeid, Nodeid>(firstParent.size() >> 1); // assume branches/merges are less frequent
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113 allNodes = new LinkedHashSet<Nodeid>();
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114
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115 Inspector insp = new Inspector() {
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116 final Nodeid[] sequentialRevisionNodeids = new Nodeid[revisionCount];
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117 int ix = 0;
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118 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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119 if (ix != revisionNumber) {
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120 // XXX temp code, just to make sure I understand what's going on here
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121 throw new IllegalStateException();
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122 }
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123 if (parent1Revision >= revisionNumber || parent2Revision >= revisionNumber) {
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124 throw new IllegalStateException(); // sanity, revisions are sequential
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125 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
126 final Nodeid nid = new Nodeid(nodeid, true);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
127 sequentialRevisionNodeids[ix++] = nid;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
128 allNodes.add(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
129 if (parent1Revision != -1) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
130 firstParent.put(nid, sequentialRevisionNodeids[parent1Revision]);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
131 if (parent2Revision != -1) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
132 secondParent.put(nid, sequentialRevisionNodeids[parent2Revision]);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
133 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
134 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
135 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
136 };
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
137 stream.iterate(0, -1, false, insp);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
138 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
139
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
140 public Set<Nodeid> allNodes() {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
141 return Collections.unmodifiableSet(allNodes);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
142 }
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
143
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
144 // FIXME need to decide whether Nodeid(00 * 20) is always known or not
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
145 public boolean knownNode(Nodeid nid) {
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
146 return allNodes.contains(nid);
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
147 }
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
148
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
149 // null if none
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
150 public Nodeid firstParent(Nodeid nid) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
151 return firstParent.get(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
152 }
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
153
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
154 // never null, Nodeid.NULL if none known
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
155 public Nodeid safeFirstParent(Nodeid nid) {
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
156 Nodeid rv = firstParent(nid);
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
157 return rv == null ? Nodeid.NULL : rv;
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
158 }
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
159
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
160 public Nodeid secondParent(Nodeid nid) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
161 return secondParent.get(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
162 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
163
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
164 public Nodeid safeSecondParent(Nodeid nid) {
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
165 Nodeid rv = secondParent(nid);
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
166 return rv == null ? Nodeid.NULL : rv;
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
167 }
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
168
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
169 public boolean appendParentsOf(Nodeid nid, Collection<Nodeid> c) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
170 Nodeid p1 = firstParent(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
171 boolean modified = false;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
172 if (p1 != null) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
173 modified = c.add(p1);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
174 Nodeid p2 = secondParent(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
175 if (p2 != null) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
176 modified = c.add(p2) || modified;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
177 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
178 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
179 return modified;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
180 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
181 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
182 }