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annotate src/org/tmatesoft/hg/internal/Internals.java @ 264:6bb5e7ed051a

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Optimize memory usage (reduce number of objects instantiated) when pooling file names and nodeids during manifest parsing
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Aug 2011 03:36:25 +0200
parents 706bcc7cfee4
children a415fe296a50
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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a3a2e5deb320 Updated contact address to support@hg4j.com
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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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19 import static org.tmatesoft.hg.internal.RequiresFile.*;
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21 import java.io.File;
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22 import java.io.FileOutputStream;
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23 import java.io.IOException;
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24 import java.util.ArrayList;
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25 import java.util.List;
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26
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27 import org.tmatesoft.hg.repo.HgRepository;
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28 import org.tmatesoft.hg.util.PathRewrite;
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29
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30 /**
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31 * Fields/members that shall not be visible
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32 *
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33 * @author Artem Tikhomirov
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34 * @author TMate Software Ltd.
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35 */
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36 public class Internals {
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37
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38 private int requiresFlags = 0;
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39 private List<Filter.Factory> filterFactories;
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40
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41
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42 public Internals() {
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43 }
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44
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a5275143664c Complete path hash calculation of fncache requirement
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45 public/*for tests, otherwise pkg*/ void setStorageConfig(int version, int flags) {
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46 requiresFlags = flags;
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47 }
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49 // XXX perhaps, should keep both fields right here, not in the HgRepository
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50 public PathRewrite buildDataFilesHelper() {
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51 return new StoragePathHelper((requiresFlags & STORE) != 0, (requiresFlags & FNCACHE) != 0, (requiresFlags & DOTENCODE) != 0);
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52 }
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53
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54 public PathRewrite buildRepositoryFilesHelper() {
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55 if ((requiresFlags & STORE) != 0) {
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56 return new PathRewrite() {
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57 public String rewrite(String path) {
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58 return "store/" + path;
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59 }
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60 };
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61 } else {
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62 return new PathRewrite() {
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63 public String rewrite(String path) {
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64 //no-op
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65 return path;
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66 }
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67 };
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68 }
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69 }
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71 public ConfigFile newConfigFile() {
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72 return new ConfigFile();
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73 }
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75 public List<Filter.Factory> getFilters(HgRepository hgRepo, ConfigFile cfg) {
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76 if (filterFactories == null) {
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77 filterFactories = new ArrayList<Filter.Factory>();
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78 if (cfg.hasEnabledExtension("eol")) {
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79 NewlineFilter.Factory ff = new NewlineFilter.Factory();
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80 ff.initialize(hgRepo, cfg);
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81 filterFactories.add(ff);
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82 }
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83 if (cfg.hasEnabledExtension("keyword")) {
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84 KeywordFilter.Factory ff = new KeywordFilter.Factory();
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85 ff.initialize(hgRepo, cfg);
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86 filterFactories.add(ff);
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87 }
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88 }
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89 return filterFactories;
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90 }
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92 public void initEmptyRepository(File hgDir) throws IOException {
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93 hgDir.mkdir();
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94 FileOutputStream requiresFile = new FileOutputStream(new File(hgDir, "requires"));
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95 StringBuilder sb = new StringBuilder(40);
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96 sb.append("revlogv1\n");
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97 if ((requiresFlags & STORE) != 0) {
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98 sb.append("store\n");
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99 }
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100 if ((requiresFlags & FNCACHE) != 0) {
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101 sb.append("fncache\n");
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102 }
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103 if ((requiresFlags & DOTENCODE) != 0) {
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104 sb.append("dotencode\n");
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105 }
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106 requiresFile.write(sb.toString().getBytes());
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107 requiresFile.close();
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108 new File(hgDir, "store").mkdir(); // with that, hg verify says ok.
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109 }
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111 }