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annotate src/org/tmatesoft/hg/core/HgChangesetTreeHandler.java @ 369:091666b87f62

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Issue 21: Recognize extensions with prefixed names
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Dec 2011 01:46:40 +0300
parents 189dc6dc1c3e
children a2341e761609
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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.util.Collection;
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20
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21 import org.tmatesoft.hg.util.CancelledException;
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22 import org.tmatesoft.hg.util.Pair;
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23
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24 /**
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25 *
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26 * @author Artem Tikhomirov
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27 * @author TMate Software Ltd.
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28 */
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29 public interface HgChangesetTreeHandler {
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30 /**
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31 * @param entry access to various pieces of information about current tree node. Instances might be
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32 * reused across calls and shall not be kept by client's code
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33 */
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34 public void next(HgChangesetTreeHandler.TreeElement entry) throws CancelledException;
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35
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36 interface TreeElement {
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37 /**
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38 * Revision of the revlog being iterated. For example, when walking file history, return value represents file revisions.
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39 *
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40 * @return revision of the revlog being iterated.
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41 */
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42 public Nodeid fileRevision();
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43
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44 /**
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45 * @return changeset associated with the current revision
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46 * @throws HgException indicates failure dealing with Mercurial data
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47 */
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48 public HgChangeset changeset() throws HgException;
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49
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50 /**
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51 * Lightweight alternative to {@link #changeset()}, identifies changeset in which current file node has been modified
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52 * @return changeset {@link Nodeid}
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53 */
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54 public Nodeid changesetRevision();
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55
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56 /**
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57 * Node, these are not necessarily in direct relation to parents of changeset from {@link #changeset()}
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58 * @return changesets that correspond to parents of the current file node, either pair element may be <code>null</code>.
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59 * @throws HgException indicates failure dealing with Mercurial data
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60 */
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61 public Pair<HgChangeset, HgChangeset> parents() throws HgException;
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63 /**
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64 * Lightweight alternative to {@link #parents()}, give {@link Nodeid nodeids} only
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65 * @return two values, neither is <code>null</code>, use {@link Nodeid#isNull()} to identify parent not set
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66 */
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67 public Pair<Nodeid, Nodeid> parentRevisions();
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68
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69 /**
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70 * Changes that originate from the given change and bear it as their parent.
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71 * @return collection (possibly empty) of immediate children of the change
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72 * @throws HgException indicates failure dealing with Mercurial data
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73 */
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74 public Collection<HgChangeset> children() throws HgException;
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75
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76 /**
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77 * Lightweight alternative to {@link #children()}.
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78 * @return never <code>null</code>
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79 */
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80 public Collection<Nodeid> childRevisions();
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81 }
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82 }