Mercurial > jhg

annotate src/com/tmate/hgkit/ll/Revlog.java @ 58:4cfc47bc14cc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Status against local working dir extracted into distinct class. Iterating over local files extracted for ease of os-dependant patching
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 17 Jan 2011 23:01:19 +0100
parents 576d6e8a09f6
children
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 import java.util.Collection;
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10 import java.util.Collections;
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11 import java.util.HashMap;
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12 import java.util.LinkedHashSet;
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13 import java.util.Map;
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14 import java.util.Set;
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15
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16 /**
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17 *
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18 * @author artem
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19 */
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20 public abstract class Revlog {
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21
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22 private final HgRepository hgRepo;
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23 protected final RevlogStream content;
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25 protected Revlog(HgRepository hgRepo, RevlogStream content) {
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26 if (hgRepo == null) {
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27 throw new NullPointerException();
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28 }
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29 this.hgRepo = hgRepo;
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30 this.content = content;
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31 }
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32
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33 public final HgRepository getRepo() {
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34 return hgRepo;
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35 }
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36
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37 public int getRevisionCount() {
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38 return content.revisionCount();
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39 }
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40
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41 public int getLocalRevisionNumber(Nodeid nid) {
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42 int revision = content.findLocalRevisionNumber(nid);
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43 if (revision == Integer.MIN_VALUE) {
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44 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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45 }
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46 return revision;
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47 }
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48
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49 // Till now, i follow approach that NULL nodeid is never part of revlog
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50 public boolean isKnown(Nodeid nodeid) {
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51 final int rn = content.findLocalRevisionNumber(nodeid);
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52 if (Integer.MIN_VALUE == rn) {
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53 return false;
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54 }
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55 if (rn < 0 || rn >= content.revisionCount()) {
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56 // Sanity check
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57 throw new IllegalStateException();
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58 }
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59 return true;
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60 }
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62 /**
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63 * 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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64 * @param nodeid
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65 */
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66 public byte[] content(Nodeid nodeid) {
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67 return content(getLocalRevisionNumber(nodeid));
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68 }
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69
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70 /**
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71 * @param revision - repo-local index of this file change (not a changelog revision number!)
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72 */
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73 public byte[] content(int revision) {
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74 final byte[][] dataPtr = new byte[1][];
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75 Revlog.Inspector insp = new Revlog.Inspector() {
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76 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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77 dataPtr[0] = data;
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78 }
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79 };
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80 content.iterate(revision, revision, true, insp);
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81 return dataPtr[0];
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82 }
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83
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84 /**
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85 * XXX perhaps, return value Nodeid[2] and boolean needNodeids is better (and higher level) API for this query?
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86 *
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87 * @param revision - revision to query parents, or {@link HgRepository#TIP}
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88 * @param parentRevisions - int[2] to get local revision numbers of parents (e.g. {6, -1})
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89 * @param parent1 - byte[20] or null, if parent's nodeid is not needed
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90 * @param parent2 - byte[20] or null, if second parent's nodeid is not needed
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91 * @return
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92 */
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93 public void parents(int revision, int[] parentRevisions, byte[] parent1, byte[] parent2) {
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94 if (revision != TIP && !(revision >= 0 && revision < content.revisionCount())) {
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95 throw new IllegalArgumentException(String.valueOf(revision));
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96 }
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97 if (parentRevisions == null || parentRevisions.length < 2) {
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98 throw new IllegalArgumentException(String.valueOf(parentRevisions));
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99 }
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100 if (parent1 != null && parent1.length < 20) {
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101 throw new IllegalArgumentException(parent1.toString());
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102 }
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103 if (parent2 != null && parent2.length < 20) {
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104 throw new IllegalArgumentException(parent2.toString());
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105 }
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106 class ParentCollector implements Revlog.Inspector {
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107 public int p1 = -1;
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108 public int p2 = -1;
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109 public byte[] nodeid;
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110
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111 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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112 p1 = parent1Revision;
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113 p2 = parent2Revision;
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114 this.nodeid = new byte[20];
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115 // nodeid arg now comes in 32 byte from (as in file format description), however upper 12 bytes are zeros.
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116 System.arraycopy(nodeid, nodeid.length > 20 ? nodeid.length - 20 : 0, this.nodeid, 0, 20);
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117 }
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118 };
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119 ParentCollector pc = new ParentCollector();
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120 content.iterate(revision, revision, false, pc);
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121 parentRevisions[0] = pc.p1;
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122 parentRevisions[1] = pc.p2;
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123 if (parent1 != null) {
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124 if (parentRevisions[0] == -1) {
576d6e8a09f6 Analog of 'hg status --change' command
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125 Arrays.fill(parent1, 0, 20, (byte) 0);
576d6e8a09f6 Analog of 'hg status --change' command
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126 } else {
576d6e8a09f6 Analog of 'hg status --change' command
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127 content.iterate(parentRevisions[0], parentRevisions[0], false, pc);
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128 System.arraycopy(pc.nodeid, 0, parent1, 0, 20);
576d6e8a09f6 Analog of 'hg status --change' command
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129 }
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130 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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131 if (parent2 != null) {
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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132 if (parentRevisions[1] == -1) {
576d6e8a09f6 Analog of 'hg status --change' command
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133 Arrays.fill(parent2, 0, 20, (byte) 0);
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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134 } else {
576d6e8a09f6 Analog of 'hg status --change' command
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135 content.iterate(parentRevisions[1], parentRevisions[1], false, pc);
576d6e8a09f6 Analog of 'hg status --change' command
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136 System.arraycopy(pc.nodeid, 0, parent2, 0, 20);
576d6e8a09f6 Analog of 'hg status --change' command
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137 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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138 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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139 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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140
22
603806cd2dc6 Status of local working dir against non-tip base revision
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141 // 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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142 // instantly - e.g. calculate hash, or comparing two revisions
29
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143 // XXX seems that RevlogStream is better place for this class.
2
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144 public interface Inspector {
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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diff changeset
145 // XXX boolean retVal to indicate whether to continue?
24
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diff changeset
146 // 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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147 void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[/*20*/] nodeid, byte[] data);
2
08db726a0fb7 Shaping out low-level Hg structures
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148 }
29
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diff changeset
149
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diff changeset
150 /*
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diff changeset
151 * XXX think over if it's better to do either:
6cce719bbb62 Collector for nodes and their parents
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diff changeset
152 * pw = getChangelog().new ParentWalker(); pw.init() and pass pw instance around as needed
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diff changeset
153 * or
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
154 * add Revlog#getParentWalker(), static class, make cons() and #init package-local, and keep SoftReference to allow walker reuse.
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diff changeset
155 *
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
156 * and yes, walker is not a proper name
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
157 */
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diff changeset
158 public final class ParentWalker {
6cce719bbb62 Collector for nodes and their parents
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diff changeset
159 private Map<Nodeid, Nodeid> firstParent;
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parents: 24
diff changeset
160 private Map<Nodeid, Nodeid> secondParent;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
161 private Set<Nodeid> allNodes;
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parents: 24
diff changeset
162
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parents: 24
diff changeset
163 public ParentWalker() {
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parents: 24
diff changeset
164 firstParent = secondParent = Collections.emptyMap();
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parents: 24
diff changeset
165 allNodes = Collections.emptySet();
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
166 }
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parents: 24
diff changeset
167
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parents: 24
diff changeset
168 public void init() {
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diff changeset
169 final RevlogStream stream = Revlog.this.content;
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
170 final int revisionCount = stream.revisionCount();
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parents: 24
diff changeset
171 firstParent = new HashMap<Nodeid, Nodeid>(revisionCount);
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parents: 24
diff changeset
172 secondParent = new HashMap<Nodeid, Nodeid>(firstParent.size() >> 1); // assume branches/merges are less frequent
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
173 allNodes = new LinkedHashSet<Nodeid>();
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parents: 24
diff changeset
174
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parents: 24
diff changeset
175 Inspector insp = new Inspector() {
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parents: 24
diff changeset
176 final Nodeid[] sequentialRevisionNodeids = new Nodeid[revisionCount];
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
177 int ix = 0;
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
178 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
179 if (ix != revisionNumber) {
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
180 // XXX temp code, just to make sure I understand what's going on here
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
181 throw new IllegalStateException();
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
182 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
183 if (parent1Revision >= revisionNumber || parent2Revision >= revisionNumber) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
184 throw new IllegalStateException(); // sanity, revisions are sequential
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
185 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
186 final Nodeid nid = new Nodeid(nodeid, true);
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
187 sequentialRevisionNodeids[ix++] = nid;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
188 allNodes.add(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
189 if (parent1Revision != -1) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
190 firstParent.put(nid, sequentialRevisionNodeids[parent1Revision]);
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
191 if (parent2Revision != -1) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
192 secondParent.put(nid, sequentialRevisionNodeids[parent2Revision]);
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
193 }
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parents: 24
diff changeset
194 }
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parents: 24
diff changeset
195 }
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parents: 24
diff changeset
196 };
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diff changeset
197 stream.iterate(0, -1, false, insp);
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diff changeset
198 }
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parents: 24
diff changeset
199
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diff changeset
200 public Set<Nodeid> allNodes() {
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diff changeset
201 return Collections.unmodifiableSet(allNodes);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
202 }
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
203
346b66add79d Basic lookup for incoming changes
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parents: 29
diff changeset
204 // FIXME need to decide whether Nodeid(00 * 20) is always known or not
346b66add79d Basic lookup for incoming changes
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diff changeset
205 public boolean knownNode(Nodeid nid) {
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
206 return allNodes.contains(nid);
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
207 }
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
208
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diff changeset
209 // null if none
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diff changeset
210 public Nodeid firstParent(Nodeid nid) {
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diff changeset
211 return firstParent.get(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
212 }
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
213
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
214 // never null, Nodeid.NULL if none known
26e3eeaa3962 branch and user filtering for log operation
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parents: 39
diff changeset
215 public Nodeid safeFirstParent(Nodeid nid) {
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parents: 39
diff changeset
216 Nodeid rv = firstParent(nid);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
217 return rv == null ? Nodeid.NULL : rv;
26e3eeaa3962 branch and user filtering for log operation
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parents: 39
diff changeset
218 }
29
6cce719bbb62 Collector for nodes and their parents
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diff changeset
219
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diff changeset
220 public Nodeid secondParent(Nodeid nid) {
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diff changeset
221 return secondParent.get(nid);
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parents: 24
diff changeset
222 }
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
223
49
26e3eeaa3962 branch and user filtering for log operation
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parents: 39
diff changeset
224 public Nodeid safeSecondParent(Nodeid nid) {
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parents: 39
diff changeset
225 Nodeid rv = secondParent(nid);
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parents: 39
diff changeset
226 return rv == null ? Nodeid.NULL : rv;
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parents: 39
diff changeset
227 }
26e3eeaa3962 branch and user filtering for log operation
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parents: 39
diff changeset
228
29
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diff changeset
229 public boolean appendParentsOf(Nodeid nid, Collection<Nodeid> c) {
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parents: 24
diff changeset
230 Nodeid p1 = firstParent(nid);
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parents: 24
diff changeset
231 boolean modified = false;
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parents: 24
diff changeset
232 if (p1 != null) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
233 modified = c.add(p1);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
234 Nodeid p2 = secondParent(nid);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
235 if (p2 != null) {
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parents: 24
diff changeset
236 modified = c.add(p2) || modified;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
237 }
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parents: 24
diff changeset
238 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
239 return modified;
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parents: 24
diff changeset
240 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
241 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
242 }