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comparison src/org/tmatesoft/hg/internal/ManifestRevision.java @ 248:3fbfce107f94

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Issue 8: Means to find out information about given file at specific changeset. Inner ManifestRevisionInspector got promoted to ManifestRevision
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 12 Aug 2011 18:48:57 +0200
parents
children 6dbbc53fc46d
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247:f052f40839ec 248:3fbfce107f94
1 /*
2 * Copyright (c) 2011 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.internal;
18
19 import java.util.Collection;
20 import java.util.TreeMap;
21
22 import org.tmatesoft.hg.core.Nodeid;
23 import org.tmatesoft.hg.repo.HgManifest;
24
25 /**
26 * Specific revision of the manifest.
27 * Note, suited to keep single revision only ({@link #changeset()}).
28 *
29 * @author Artem Tikhomirov
30 * @author TMate Software Ltd.
31 */
32 public final class ManifestRevision implements HgManifest.Inspector {
33 private final TreeMap<String, Nodeid> idsMap;
34 private final TreeMap<String, String> flagsMap;
35 private final Pool<Nodeid> idsPool;
36 private final Pool<String> namesPool;
37 private Nodeid changeset;
38 private int changelogRev;
39
40 // optional pools for effective management of nodeids and filenames (they are likely
41 // to be duplicated among different manifest revisions
42 public ManifestRevision(Pool<Nodeid> nodeidPool, Pool<String> filenamePool) {
43 idsPool = nodeidPool;
44 namesPool = filenamePool;
45 idsMap = new TreeMap<String, Nodeid>();
46 flagsMap = new TreeMap<String, String>();
47 }
48
49 public Collection<String> files() {
50 return idsMap.keySet();
51 }
52
53 public Nodeid nodeid(String fname) {
54 return idsMap.get(fname);
55 }
56
57 public String flags(String fname) {
58 return flagsMap.get(fname);
59 }
60
61 /**
62 * @return identifier of the changeset this manifest revision corresponds to.
63 */
64 public Nodeid changeset() {
65 return changeset;
66 }
67
68 public int changesetLocalRev() {
69 return changelogRev;
70 }
71
72 //
73
74 public boolean next(Nodeid nid, String fname, String flags) {
75 if (namesPool != null) {
76 fname = namesPool.unify(fname);
77 }
78 if (idsPool != null) {
79 nid = idsPool.unify(nid);
80 }
81 idsMap.put(fname, nid);
82 if (flags != null) {
83 // TreeMap$Entry takes 32 bytes. No reason to keep null for such price
84 // Perhaps, Map<String, Pair<Nodeid, String>> might be better solution
85 flagsMap.put(fname, flags);
86 }
87 return true;
88 }
89
90 public boolean end(int revision) {
91 // in fact, this class cares about single revision
92 return false;
93 }
94
95 public boolean begin(int revision, Nodeid nid, int changelogRevision) {
96 if (changeset != null) {
97 idsMap.clear();
98 flagsMap.clear();
99 }
100 changeset = nid;
101 changelogRev = changelogRevision;
102 return true;
103 }
104 }