Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgRepoFacade.java @ 228:fffe4f882248

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NPE when directory doesn't exist
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 27 May 2011 03:01:26 +0200
parents cd3371670f0b
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.core;
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18
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19 import java.io.File;
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20
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21 import org.tmatesoft.hg.repo.HgRepository;
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22 import org.tmatesoft.hg.repo.HgLookup;
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23
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24 /**
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25 * Starting point for the library.
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26 * <p>Sample use:
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27 * <pre>
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28 * HgRepoFacade f = new HgRepoFacade();
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29 * f.initFrom(System.getenv("whatever.repo.location"));
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30 * HgStatusCommand statusCmd = f.createStatusCommand();
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31 * HgStatusCommand.Handler handler = ...;
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32 * statusCmd.execute(handler);
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33 * </pre>
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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 HgRepoFacade {
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39 private HgRepository repo;
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40
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41 public HgRepoFacade() {
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42 }
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43
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44 /**
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45 * @param hgRepo
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46 * @return true on successful initialization
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47 * @throws IllegalArgumentException when argument is null
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48 */
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49 public boolean init(HgRepository hgRepo) {
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50 if (hgRepo == null) {
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51 throw new IllegalArgumentException();
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52 }
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53 repo = hgRepo;
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54 return !repo.isInvalid();
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55 }
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57 /**
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58 * Tries to find repository starting from the current working directory.
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59 * @return <code>true</code> if found valid repository
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60 * @throws HgException in case of errors during repository initialization
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61 */
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62 public boolean init() throws HgException {
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63 repo = new HgLookup().detectFromWorkingDir();
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64 return repo != null && !repo.isInvalid();
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65 }
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67 /**
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68 * Looks up Mercurial repository starting from specified location and up to filesystem root.
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69 *
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70 * @param repoLocation path to any folder within structure of a Mercurial repository.
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71 * @return <code>true</code> if found valid repository
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72 * @throws HgException if there are errors accessing specified location
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73 * @throws IllegalArgumentException if argument is <code>null</code>
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74 */
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75 public boolean initFrom(File repoLocation) throws HgException {
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76 if (repoLocation == null) {
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77 throw new IllegalArgumentException();
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78 }
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79 repo = new HgLookup().detect(repoLocation);
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80 return repo != null && !repo.isInvalid();
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81 }
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83 public HgRepository getRepository() {
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84 if (repo == null) {
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85 throw new IllegalStateException("Call any of #init*() methods first first");
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86 }
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87 return repo;
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88 }
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90 public HgLogCommand createLogCommand() {
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91 return new HgLogCommand(repo/*, getCommandContext()*/);
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92 }
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94 public HgStatusCommand createStatusCommand() {
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95 return new HgStatusCommand(repo/*, getCommandContext()*/);
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96 }
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98 public HgCatCommand createCatCommand() {
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99 return new HgCatCommand(repo);
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100 }
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101
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102 public HgManifestCommand createManifestCommand() {
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103 return new HgManifestCommand(repo);
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104 }
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106 public HgOutgoingCommand createOutgoingCommand() {
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107 return new HgOutgoingCommand(repo);
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108 }
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110 public HgIncomingCommand createIncomingCommand() {
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111 return new HgIncomingCommand(repo);
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112 }
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113 }