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annotate src/org/tmatesoft/hg/core/HgChangesetTreeHandler.java @ 328:a674b8590362

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Move file tree history to upper API level
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 05 Oct 2011 07:13:57 +0200
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children 189dc6dc1c3e
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328
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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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 * @return changeset associated with the current revision
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45 */
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46 public HgChangeset changeset();
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47
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48 /**
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49 * Lightweight alternative to {@link #changeset()}, identifies changeset in which current file node has been modified
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50 * @return changeset {@link Nodeid}
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51 */
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52 public Nodeid changesetRevision();
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53
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54 /**
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55 * Node, these are not necessarily in direct relation to parents of changeset from {@link #changeset()}
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56 * @return changesets that correspond to parents of the current file node, either pair element may be <code>null</code>.
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57 */
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58 public Pair<HgChangeset, HgChangeset> parents();
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59
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60 /**
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61 * Lightweight alternative to {@link #parents()}, give {@link Nodeid nodeids} only
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62 * @return two values, neither is <code>null</code>, use {@link Nodeid#isNull()} to identify parent not set
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63 */
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64 public Pair<Nodeid, Nodeid> parentRevisions();
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65
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66 public Collection<HgChangeset> children();
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67
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68 /**
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69 * Lightweight alternative to {@link #children()}.
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70 * @return never <code>null</code>
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71 */
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72 public Collection<Nodeid> childRevisions();
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73 }
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74 }