Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/SubrepoManager.java @ 258:e5776067b3b8

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Reduce number of objects instantiated on revlog read
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 16 Aug 2011 22:08:15 +0200
parents df9d2854d3d6
children 981f9f50bb6c
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import java.io.BufferedReader;
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20 import java.io.File;
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21 import java.io.FileReader;
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22 import java.io.IOException;
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23 import java.util.Arrays;
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24 import java.util.Collections;
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25 import java.util.HashMap;
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26 import java.util.LinkedList;
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27 import java.util.List;
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28 import java.util.Map;
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29
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30 import org.tmatesoft.hg.repo.HgRepository;
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31 import org.tmatesoft.hg.repo.HgSubrepoLocation;
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32
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33 /**
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public class SubrepoManager /* XXX RepoChangeNotifier, RepoChangeListener */{
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39
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40 private final HgRepository repo;
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41 private List<HgSubrepoLocation> subRepos;
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42
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43 public SubrepoManager(HgRepository hgRepo) {
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44 assert hgRepo != null;
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45 repo = hgRepo;
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46 }
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47
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48 private List<HgSubrepoLocation> readActualState() {
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49 File hgsubFile = new File(repo.getWorkingDir(), ".hgsub");
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50 if (!hgsubFile.canRead()) {
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51 return Collections.emptyList();
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52 }
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53 try {
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54 Map<String, String> state; // path -> revision
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55 File hgstateFile = new File(repo.getWorkingDir(), ".hgsubstate");
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56 if (hgstateFile.canRead()) {
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57 state = readState(new BufferedReader(new FileReader(hgstateFile)));
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58 } else {
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59 state = Collections.emptyMap();
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60 }
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61 BufferedReader br = new BufferedReader(new FileReader(hgsubFile));
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62 return readConfig(br, state);
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63 } catch (IOException ex) {
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64 ex.printStackTrace(); // XXX log. Generally, shall not happen
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65 }
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66 return Collections.emptyList();
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67 }
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68
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69 private List<HgSubrepoLocation> readConfig(BufferedReader br, Map<String, String> substate) throws IOException {
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70 try {
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71 String line;
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72 LinkedList<HgSubrepoLocation> res = new LinkedList<HgSubrepoLocation>();
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73 while ((line = br.readLine()) != null) {
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74 int sep = line.indexOf('=');
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75 if (sep == -1) {
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76 continue;
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77 }
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78 // since both key and value are referenced from HgSubrepoLocation, doesn't make sense
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79 // to have separate String instances (new String(line.substring()))
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80 String key = line.substring(0, sep).trim();
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81 String value = line.substring(sep + 1).trim();
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82 if (value.length() == 0) {
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83 // XXX log bad line?
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84 continue;
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85 }
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86 HgSubrepoLocation.Kind kind = HgSubrepoLocation.Kind.Hg;
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87 int kindEnd = value.indexOf(']', 1);
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88 if (value.charAt(0) == '[' && kindEnd != -1) {
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89 String kindStr = value.substring(1, kindEnd);
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90 value = value.substring(kindEnd + 1);
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91 if ("svn".equals(kindStr)) {
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92 kind = HgSubrepoLocation.Kind.SVN;
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93 } else if ("git".equals(kindStr)) {
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94 kind = HgSubrepoLocation.Kind.Git;
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95 }
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96 }
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97 // TODO respect paths mappings in config file
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98 HgSubrepoLocation loc = new HgSubrepoLocation(repo, key, value, kind, substate.get(key));
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99 res.add(loc);
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100 }
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101 return Arrays.asList(res.toArray(new HgSubrepoLocation[res.size()]));
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102 } finally {
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103 br.close();
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104 }
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105 }
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106
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107 private Map<String, String> readState(BufferedReader br) throws IOException {
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108 HashMap<String, String> rv = new HashMap<String, String>();
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109 try {
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110 String line;
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111 while ((line = br.readLine()) != null) {
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112 int sep = line.trim().indexOf(' ');
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113 if (sep != -1) {
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114 rv.put(line.substring(sep+1).trim(), line.substring(0, sep).trim());
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115 }
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116 }
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117 } finally {
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118 br.close();
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119 }
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120 return rv;
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121 }
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122
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123 public List<HgSubrepoLocation> all(/*int revision, or TIP|WC*/) {
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124 if (subRepos == null) {
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125 subRepos = readActualState();
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126 }
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127 return subRepos;
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128 }
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129 }