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annotate src/org/tmatesoft/hg/repo/HgRuntimeException.java @ 423:9c9c442b5f2e

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Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 23 Mar 2012 22:51:18 +0100
parents
children 48f993aa2f41
rev   line source
423
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1 /*
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2 * Copyright (c) 2012 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.repo;
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18
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19 import org.tmatesoft.hg.core.Nodeid;
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20 import org.tmatesoft.hg.internal.ExceptionInfo;
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21 import org.tmatesoft.hg.util.Path;
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22
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23 /**
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24 * Almost any method in Hg4J low-level API may throw subclass of this exception to indicate unexpected
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25 * state/condition encountered, flawed data or IO error. Since most cases can't be handled in a reasonable
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26 * manner (other than catch all exceptions and tell client something went wrong), and propagating all possible
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27 * exceptions up through API is dubious task, low-level exceptions are made runtime, rooting at this single class.
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28 *
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29 * <p>Hi-level api, {@link org.tmatesoft.hg.core}, where interaction with user-supplied values is more explicit,
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30 * may follow different exception strategy.
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31 *
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32 * @author Artem Tikhomirov
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33 * @author TMate Software Ltd.
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34 */
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35 @SuppressWarnings("serial")
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36 public abstract class HgRuntimeException extends RuntimeException {
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37
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38 protected final ExceptionInfo<HgRuntimeException> details = new ExceptionInfo<HgRuntimeException>(this);
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39
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40 protected HgRuntimeException(String reason, Throwable cause) {
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41 super(reason, cause);
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42 }
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43
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44 /**
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45 * @return {@link HgRepository#BAD_REVISION} unless revision index was set during exception instantiation
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46 */
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47 public int getRevisionIndex() {
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48 return details.getRevisionIndex();
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49 }
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50
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51 public HgRuntimeException setRevisionIndex(int rev) {
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52 return details.setRevisionIndex(rev);
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53 }
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54
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55 public boolean isRevisionIndexSet() {
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56 return details.isRevisionIndexSet();
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57 }
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58
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59
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60 /**
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61 * @return non-<code>null</code> when revision was supplied at construction time
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62 */
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63 public Nodeid getRevision() {
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64 return details.getRevision();
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65 }
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66
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67 public HgRuntimeException setRevision(Nodeid r) {
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68 return details.setRevision(r);
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69 }
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70
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71 public boolean isRevisionSet() {
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72 return details.isRevisionSet();
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73 }
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74
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75 /**
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76 * @return non-null only if file name was set at construction time
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77 */
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78 public Path getFileName() {
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79 return details.getFileName();
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80 }
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81
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82 public HgRuntimeException setFileName(Path name) {
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83 return details.setFileName(name);
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84 }
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85
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86 @Override
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87 public String toString() {
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88 StringBuilder sb = new StringBuilder(super.toString());
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89 sb.append(' ');
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90 sb.append('(');
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91 details.appendDetails(sb);
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92 sb.append(')');
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93 return sb.toString();
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94 }
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95 }