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comparison 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
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children 48f993aa2f41
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422:5d1cc7366d04 423:9c9c442b5f2e
1 /*
2 * Copyright (c) 2012 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.repo;
18
19 import org.tmatesoft.hg.core.Nodeid;
20 import org.tmatesoft.hg.internal.ExceptionInfo;
21 import org.tmatesoft.hg.util.Path;
22
23 /**
24 * Almost any method in Hg4J low-level API may throw subclass of this exception to indicate unexpected
25 * state/condition encountered, flawed data or IO error. Since most cases can't be handled in a reasonable
26 * manner (other than catch all exceptions and tell client something went wrong), and propagating all possible
27 * exceptions up through API is dubious task, low-level exceptions are made runtime, rooting at this single class.
28 *
29 * <p>Hi-level api, {@link org.tmatesoft.hg.core}, where interaction with user-supplied values is more explicit,
30 * may follow different exception strategy.
31 *
32 * @author Artem Tikhomirov
33 * @author TMate Software Ltd.
34 */
35 @SuppressWarnings("serial")
36 public abstract class HgRuntimeException extends RuntimeException {
37
38 protected final ExceptionInfo<HgRuntimeException> details = new ExceptionInfo<HgRuntimeException>(this);
39
40 protected HgRuntimeException(String reason, Throwable cause) {
41 super(reason, cause);
42 }
43
44 /**
45 * @return {@link HgRepository#BAD_REVISION} unless revision index was set during exception instantiation
46 */
47 public int getRevisionIndex() {
48 return details.getRevisionIndex();
49 }
50
51 public HgRuntimeException setRevisionIndex(int rev) {
52 return details.setRevisionIndex(rev);
53 }
54
55 public boolean isRevisionIndexSet() {
56 return details.isRevisionIndexSet();
57 }
58
59
60 /**
61 * @return non-<code>null</code> when revision was supplied at construction time
62 */
63 public Nodeid getRevision() {
64 return details.getRevision();
65 }
66
67 public HgRuntimeException setRevision(Nodeid r) {
68 return details.setRevision(r);
69 }
70
71 public boolean isRevisionSet() {
72 return details.isRevisionSet();
73 }
74
75 /**
76 * @return non-null only if file name was set at construction time
77 */
78 public Path getFileName() {
79 return details.getFileName();
80 }
81
82 public HgRuntimeException setFileName(Path name) {
83 return details.setFileName(name);
84 }
85
86 @Override
87 public String toString() {
88 StringBuilder sb = new StringBuilder(super.toString());
89 sb.append(' ');
90 sb.append('(');
91 details.appendDetails(sb);
92 sb.append(')');
93 return sb.toString();
94 }
95 }