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comparison src/com/tmate/hgkit/ll/Revlog.java @ 56:576d6e8a09f6

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Analog of 'hg status --change' command
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 17 Jan 2011 05:15:13 +0100
parents 26e3eeaa3962
children
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55:05829a70b30b 56:576d6e8a09f6
1 /* 1 /*
2 * Copyright (c) 2010, 2011 Artem Tikhomirov 2 * Copyright (c) 2010, 2011 Artem Tikhomirov
3 */ 3 */
4 package com.tmate.hgkit.ll; 4 package com.tmate.hgkit.ll;
5 5
6 import static com.tmate.hgkit.ll.HgRepository.TIP;
7
8 import java.util.Arrays;
6 import java.util.Collection; 9 import java.util.Collection;
7 import java.util.Collections; 10 import java.util.Collections;
8 import java.util.HashMap; 11 import java.util.HashMap;
9 import java.util.LinkedHashSet; 12 import java.util.LinkedHashSet;
10 import java.util.Map; 13 import java.util.Map;
74 dataPtr[0] = data; 77 dataPtr[0] = data;
75 } 78 }
76 }; 79 };
77 content.iterate(revision, revision, true, insp); 80 content.iterate(revision, revision, true, insp);
78 return dataPtr[0]; 81 return dataPtr[0];
82 }
83
84 /**
85 * XXX perhaps, return value Nodeid[2] and boolean needNodeids is better (and higher level) API for this query?
86 *
87 * @param revision - revision to query parents, or {@link HgRepository#TIP}
88 * @param parentRevisions - int[2] to get local revision numbers of parents (e.g. {6, -1})
89 * @param parent1 - byte[20] or null, if parent's nodeid is not needed
90 * @param parent2 - byte[20] or null, if second parent's nodeid is not needed
91 * @return
92 */
93 public void parents(int revision, int[] parentRevisions, byte[] parent1, byte[] parent2) {
94 if (revision != TIP && !(revision >= 0 && revision < content.revisionCount())) {
95 throw new IllegalArgumentException(String.valueOf(revision));
96 }
97 if (parentRevisions == null || parentRevisions.length < 2) {
98 throw new IllegalArgumentException(String.valueOf(parentRevisions));
99 }
100 if (parent1 != null && parent1.length < 20) {
101 throw new IllegalArgumentException(parent1.toString());
102 }
103 if (parent2 != null && parent2.length < 20) {
104 throw new IllegalArgumentException(parent2.toString());
105 }
106 class ParentCollector implements Revlog.Inspector {
107 public int p1 = -1;
108 public int p2 = -1;
109 public byte[] nodeid;
110
111 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
112 p1 = parent1Revision;
113 p2 = parent2Revision;
114 this.nodeid = new byte[20];
115 // nodeid arg now comes in 32 byte from (as in file format description), however upper 12 bytes are zeros.
116 System.arraycopy(nodeid, nodeid.length > 20 ? nodeid.length - 20 : 0, this.nodeid, 0, 20);
117 }
118 };
119 ParentCollector pc = new ParentCollector();
120 content.iterate(revision, revision, false, pc);
121 parentRevisions[0] = pc.p1;
122 parentRevisions[1] = pc.p2;
123 if (parent1 != null) {
124 if (parentRevisions[0] == -1) {
125 Arrays.fill(parent1, 0, 20, (byte) 0);
126 } else {
127 content.iterate(parentRevisions[0], parentRevisions[0], false, pc);
128 System.arraycopy(pc.nodeid, 0, parent1, 0, 20);
129 }
130 }
131 if (parent2 != null) {
132 if (parentRevisions[1] == -1) {
133 Arrays.fill(parent2, 0, 20, (byte) 0);
134 } else {
135 content.iterate(parentRevisions[1], parentRevisions[1], false, pc);
136 System.arraycopy(pc.nodeid, 0, parent2, 0, 20);
137 }
138 }
79 } 139 }
80 140
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 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
82 // instantly - e.g. calculate hash, or comparing two revisions 142 // instantly - e.g. calculate hash, or comparing two revisions
83 // XXX seems that RevlogStream is better place for this class. 143 // XXX seems that RevlogStream is better place for this class.