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comparison src/org/tmatesoft/hg/core/HgChangesetTreeHandler.java @ 628:6526d8adbc0f

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Explicit HgRuntimeException to facilitate easy switch from runtime to checked exceptions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 22 May 2013 15:52:31 +0200
parents e6c8b9b654b2
children
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627:5153eb73b18d 628:6526d8adbc0f
1 /* 1 /*
2 * Copyright (c) 2011-2012 TMate Software Ltd 2 * Copyright (c) 2011-2013 TMate Software Ltd
3 * 3 *
4 * This program is free software; you can redistribute it and/or modify 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 5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License. 6 * the Free Software Foundation; version 2 of the License.
7 * 7 *
18 18
19 import java.util.Collection; 19 import java.util.Collection;
20 20
21 import org.tmatesoft.hg.internal.Callback; 21 import org.tmatesoft.hg.internal.Callback;
22 import org.tmatesoft.hg.repo.HgDataFile; 22 import org.tmatesoft.hg.repo.HgDataFile;
23 import org.tmatesoft.hg.repo.HgRuntimeException;
23 import org.tmatesoft.hg.util.Pair; 24 import org.tmatesoft.hg.util.Pair;
24 25
25 /** 26 /**
26 * Handler to iterate file history (generally, any revlog) with access to parent-child relations between changesets. 27 * Handler to iterate file history (generally, any revlog) with access to parent-child relations between changesets.
27 * 28 *
34 public interface HgChangesetTreeHandler { 35 public interface HgChangesetTreeHandler {
35 /** 36 /**
36 * @param entry access to various pieces of information about current tree node. Instances might be 37 * @param entry access to various pieces of information about current tree node. Instances might be
37 * reused across calls and shall not be kept by client's code 38 * reused across calls and shall not be kept by client's code
38 * @throws HgCallbackTargetException wrapper for any exception user code may produce 39 * @throws HgCallbackTargetException wrapper for any exception user code may produce
40 * @throws HgRuntimeException propagates library issues. <em>Runtime exception</em>
39 */ 41 */
40 public void treeElement(HgChangesetTreeHandler.TreeElement entry) throws HgCallbackTargetException; 42 public void treeElement(HgChangesetTreeHandler.TreeElement entry) throws HgCallbackTargetException, HgRuntimeException;
41 43
42 interface TreeElement { 44 interface TreeElement {
43 /** 45 /**
44 * Revision of the revlog being iterated. For example, when walking file history, return value represents file revisions. 46 * Revision of the revlog being iterated. For example, when walking file history, return value represents file revisions.
45 * 47 *
46 * @return revision of the revlog being iterated. 48 * @return revision of the revlog being iterated.
49 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
47 */ 50 */
48 public Nodeid fileRevision(); 51 public Nodeid fileRevision() throws HgRuntimeException;
49 52
50 /** 53 /**
51 * File node, provided revlog being iterated is a {@link HgDataFile}; {@link #fileRevision()} 54 * File node, provided revlog being iterated is a {@link HgDataFile}; {@link #fileRevision()}
52 * references revision from the history of this very {@link HgDataFile file}. 55 * references revision from the history of this very {@link HgDataFile file}.
53 * 56 *
54 * Comes handy when file history with renames is being followed to find out 57 * Comes handy when file history with renames is being followed to find out
55 * file name for particular revision in the history. 58 * file name for particular revision in the history.
56 * 59 *
57 * @return instance of the file being walked, or <code>null</code> if it's not a file but other revlog. 60 * @return instance of the file being walked, or <code>null</code> if it's not a file but other revlog.
61 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
58 */ 62 */
59 public HgDataFile file(); 63 public HgDataFile file() throws HgRuntimeException;
60 64
61 /** 65 /**
62 * @return changeset associated with the current file revision 66 * @return changeset associated with the current file revision
67 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
63 */ 68 */
64 public HgChangeset changeset(); 69 public HgChangeset changeset() throws HgRuntimeException;
65 70
66 /** 71 /**
67 * Lightweight alternative to {@link #changeset()}, identifies changeset in which current file node has been modified 72 * Lightweight alternative to {@link #changeset()}, identifies changeset in which current file node has been modified
68 * @return changeset {@link Nodeid revision} 73 * @return changeset {@link Nodeid revision}
74 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
69 */ 75 */
70 public Nodeid changesetRevision(); 76 public Nodeid changesetRevision() throws HgRuntimeException;
71 77
72 /** 78 /**
73 * Identifies parent changes, changesets where file/revlog in question was modified prior to change being visited. 79 * Identifies parent changes, changesets where file/revlog in question was modified prior to change being visited.
74 * 80 *
75 * Note, these are not necessarily in direct relation to parents of changeset from {@link #changeset()} 81 * Note, these are not necessarily in direct relation to parents of changeset from {@link #changeset()}
89 * When we are at {@link TreeElement} for <code>A</code>, <code>B</code> and <code>C</code> are changeset parents, naturally. However 95 * When we are at {@link TreeElement} for <code>A</code>, <code>B</code> and <code>C</code> are changeset parents, naturally. However
90 * if the file/revlog we've been walking has not been changed in <code>B</code> and <code>C</code>, but e.g. in <code>D</code> only, 96 * if the file/revlog we've been walking has not been changed in <code>B</code> and <code>C</code>, but e.g. in <code>D</code> only,
91 * then this {@link #parents()} call would return pair with single element only, pointing to <code>D</code> 97 * then this {@link #parents()} call would return pair with single element only, pointing to <code>D</code>
92 * 98 *
93 * @return changesets that correspond to parents of the current file node, either pair element may be <code>null</code>. 99 * @return changesets that correspond to parents of the current file node, either pair element may be <code>null</code>.
100 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
94 */ 101 */
95 public Pair<HgChangeset, HgChangeset> parents(); 102 public Pair<HgChangeset, HgChangeset> parents() throws HgRuntimeException;
96 103
97 /** 104 /**
98 * Lightweight alternative to {@link #parents()}, give {@link Nodeid nodeids} only 105 * Lightweight alternative to {@link #parents()}, give {@link Nodeid nodeids} only
99 * @return two values, neither is <code>null</code>, use {@link Nodeid#isNull()} to identify parent not set 106 * @return two values, neither is <code>null</code>, use {@link Nodeid#isNull()} to identify parent not set
107 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
100 */ 108 */
101 public Pair<Nodeid, Nodeid> parentRevisions(); 109 public Pair<Nodeid, Nodeid> parentRevisions() throws HgRuntimeException;
102 110
103 /** 111 /**
104 * Changes that originate from the given change and bear it as their parent. 112 * Changes that originate from the given change and bear it as their parent.
105 * @return collection (possibly empty) of immediate children of the change 113 * @return collection (possibly empty) of immediate children of the change
114 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
106 */ 115 */
107 public Collection<HgChangeset> children(); 116 public Collection<HgChangeset> children() throws HgRuntimeException;
108 117
109 /** 118 /**
110 * Lightweight alternative to {@link #children()}. 119 * Lightweight alternative to {@link #children()}.
111 * @return never <code>null</code> 120 * @return never <code>null</code>
121 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
112 */ 122 */
113 public Collection<Nodeid> childRevisions(); 123 public Collection<Nodeid> childRevisions() throws HgRuntimeException;
114 } 124 }
115 } 125 }