Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgMergeState.java @ 310:237de162be28
Fix building sort reverse array when element was initially in correct position.
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
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| date | Sat, 24 Sep 2011 13:25:33 +0200 | 
| parents | 6dbbc53fc46d | 
| children | f74e36b7344b | 
| rev | line source | 
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changeset | 1 /* | 
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changeset | 2 * Copyright (c) 2011 TMate Software Ltd | 
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changeset | 3 * | 
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changeset | 4 * This program is free software; you can redistribute it and/or modify | 
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changeset | 5 * it under the terms of the GNU General Public License as published by | 
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changeset | 6 * the Free Software Foundation; version 2 of the License. | 
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changeset | 7 * | 
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changeset | 8 * This program is distributed in the hope that it will be useful, | 
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changeset | 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 
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changeset | 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 
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changeset | 11 * GNU General Public License for more details. | 
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changeset | 12 * | 
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changeset | 13 * For information on how to redistribute this software under | 
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changeset | 14 * the terms of a license other than GNU General Public License | 
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changeset | 15 * contact TMate Software at support@hg4j.com | 
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changeset | 16 */ | 
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changeset | 17 package org.tmatesoft.hg.repo; | 
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changeset | 18 | 
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changeset | 19 import static org.tmatesoft.hg.core.Nodeid.NULL; | 
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changeset | 20 | 
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changeset | 21 import java.io.BufferedReader; | 
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changeset | 22 import java.io.File; | 
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changeset | 23 import java.io.FileReader; | 
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changeset | 24 import java.io.IOException; | 
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changeset | 25 import java.util.ArrayList; | 
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changeset | 26 import java.util.Arrays; | 
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changeset | 27 import java.util.Collections; | 
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changeset | 28 import java.util.List; | 
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changeset | 29 | 
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changeset | 30 import org.tmatesoft.hg.core.HgBadStateException; | 
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changeset | 31 import org.tmatesoft.hg.core.HgFileRevision; | 
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changeset | 32 import org.tmatesoft.hg.core.Nodeid; | 
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changeset | 33 import org.tmatesoft.hg.internal.ManifestRevision; | 
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changeset | 34 import org.tmatesoft.hg.internal.Pool; | 
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changeset | 35 import org.tmatesoft.hg.util.Pair; | 
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changeset | 36 import org.tmatesoft.hg.util.Path; | 
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changeset | 37 import org.tmatesoft.hg.util.PathPool; | 
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changeset | 38 import org.tmatesoft.hg.util.PathRewrite; | 
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changeset | 39 | 
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changeset | 40 /** | 
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changeset | 41 * | 
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changeset | 42 * @author Artem Tikhomirov | 
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changeset | 43 * @author TMate Software Ltd. | 
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changeset | 44 */ | 
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changeset | 45 public class HgMergeState { | 
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changeset | 46 private Nodeid wcp1, wcp2, stateParent; | 
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changeset | 47 | 
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changeset | 48 public enum Kind { | 
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changeset | 49 Resolved, Unresolved; | 
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changeset | 50 } | 
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changeset | 51 | 
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changeset | 52 public static class Entry { | 
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changeset | 53 private final Kind state; | 
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changeset | 54 private final HgFileRevision parent1; | 
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changeset | 55 private final HgFileRevision parent2; | 
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changeset | 56 private final HgFileRevision ancestor; | 
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changeset | 57 private final Path wcFile; | 
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changeset | 58 | 
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changeset | 59 /*package-local*/Entry(Kind s, Path actualCopy, HgFileRevision p1, HgFileRevision p2, HgFileRevision ca) { | 
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changeset | 60 if (p1 == null || p2 == null || ca == null || actualCopy == null) { | 
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changeset | 61 throw new IllegalArgumentException(); | 
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changeset | 62 } | 
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changeset | 63 state = s; | 
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changeset | 64 wcFile = actualCopy; | 
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changeset | 65 parent1 = p1; | 
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changeset | 66 parent2 = p2; | 
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changeset | 67 ancestor = ca; | 
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changeset | 68 } | 
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changeset | 69 | 
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changeset | 70 public Kind getState() { | 
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changeset | 71 return state; | 
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changeset | 72 } | 
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changeset | 73 public Path getActualFile() { | 
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changeset | 74 return wcFile; | 
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changeset | 75 } | 
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changeset | 76 public HgFileRevision getFirstParent() { | 
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changeset | 77 return parent1; | 
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changeset | 78 } | 
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changeset | 79 public HgFileRevision getSecondParent() { | 
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changeset | 80 return parent2; | 
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changeset | 81 } | 
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changeset | 82 public HgFileRevision getCommonAncestor() { | 
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changeset | 83 return ancestor; | 
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changeset | 84 } | 
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changeset | 85 } | 
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changeset | 86 | 
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changeset | 87 private final HgRepository repo; | 
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changeset | 88 private Entry[] entries; | 
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changeset | 89 | 
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changeset | 90 HgMergeState(HgRepository hgRepo) { | 
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changeset | 91 repo = hgRepo; | 
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changeset | 92 } | 
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changeset | 93 | 
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changeset | 94 public void refresh() throws IOException/*XXX it's unlikely caller can do anything reasonable about IOException */ { | 
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changeset | 95 entries = null; | 
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changeset | 96 final File f = new File(repo.getRepositoryRoot(), "merge/state"); | 
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changeset | 97 if (!f.canRead()) { | 
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changeset | 98 // empty state | 
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changeset | 99 return; | 
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changeset | 100 } | 
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changeset | 101 Pool<Nodeid> nodeidPool = new Pool<Nodeid>(); | 
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changeset | 102 Pool<Path> fnamePool = new Pool<Path>(); | 
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changeset | 103 Pair<Nodeid, Nodeid> wcParents = repo.getWorkingCopyParents(); | 
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changeset | 104 wcp1 = nodeidPool.unify(wcParents.first()); wcp2 = nodeidPool.unify(wcParents.second()); | 
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changeset | 105 ArrayList<Entry> result = new ArrayList<Entry>(); | 
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changeset | 106 // FIXME need to settle use of Pool<Path> and PathPool | 
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changeset | 107 // latter is pool that can create objects on demand, former is just cache | 
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changeset | 108 PathPool pathPool = new PathPool(new PathRewrite.Empty()); | 
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changeset | 109 final ManifestRevision m1 = new ManifestRevision(nodeidPool, fnamePool); | 
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changeset | 110 final ManifestRevision m2 = new ManifestRevision(nodeidPool, fnamePool); | 
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changeset | 111 if (!wcp2.isNull()) { | 
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changeset | 112 final int rp2 = repo.getChangelog().getLocalRevision(wcp2); | 
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changeset | 113 repo.getManifest().walk(rp2, rp2, m2); | 
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changeset | 114 } | 
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changeset | 115 BufferedReader br = new BufferedReader(new FileReader(f)); | 
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changeset | 116 String s = br.readLine(); | 
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changeset | 117 stateParent = nodeidPool.unify(Nodeid.fromAscii(s)); | 
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changeset | 118 final int rp1 = repo.getChangelog().getLocalRevision(stateParent); | 
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changeset | 119 repo.getManifest().walk(rp1, rp1, m1); | 
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changeset | 120 while ((s = br.readLine()) != null) { | 
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changeset | 121 String[] r = s.split("\\00"); | 
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changeset | 122 Path p1fname = pathPool.path(r[3]); | 
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changeset | 123 Nodeid nidP1 = m1.nodeid(p1fname); | 
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changeset | 124 Nodeid nidCA = nodeidPool.unify(Nodeid.fromAscii(r[5])); | 
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changeset | 125 HgFileRevision p1 = new HgFileRevision(repo, nidP1, p1fname); | 
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changeset | 126 HgFileRevision ca; | 
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changeset | 127 if (nidCA == nidP1 && r[3].equals(r[4])) { | 
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changeset | 128 ca = p1; | 
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changeset | 129 } else { | 
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changeset | 130 ca = new HgFileRevision(repo, nidCA, pathPool.path(r[4])); | 
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changeset | 131 } | 
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changeset | 132 HgFileRevision p2; | 
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changeset | 133 if (!wcp2.isNull() || !r[6].equals(r[4])) { | 
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changeset | 134 final Path p2fname = pathPool.path(r[6]); | 
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changeset | 135 Nodeid nidP2 = m2.nodeid(p2fname); | 
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changeset | 136 if (nidP2 == null) { | 
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changeset | 137 assert false : "There's not enough information (or I don't know where to look) in merge/state to find out what's the second parent"; | 
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changeset | 138 nidP2 = NULL; | 
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changeset | 139 } | 
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changeset | 140 p2 = new HgFileRevision(repo, nidP2, p2fname); | 
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changeset | 141 } else { | 
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changeset | 142 // no second parent known. no idea what to do here, assume linear merge, use common ancestor as parent | 
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changeset | 143 p2 = ca; | 
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changeset | 144 } | 
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changeset | 145 final Kind k; | 
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changeset | 146 if ("u".equals(r[1])) { | 
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changeset | 147 k = Kind.Unresolved; | 
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changeset | 148 } else if ("r".equals(r[1])) { | 
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changeset | 149 k = Kind.Resolved; | 
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changeset | 150 } else { | 
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changeset | 151 throw new HgBadStateException(r[1]); | 
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changeset | 152 } | 
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changeset | 153 Entry e = new Entry(k, pathPool.path(r[0]), p1, p2, ca); | 
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changeset | 154 result.add(e); | 
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changeset | 155 } | 
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changeset | 156 entries = result.toArray(new Entry[result.size()]); | 
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changeset | 157 br.close(); | 
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changeset | 158 pathPool.clear(); | 
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changeset | 159 } | 
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changeset | 160 | 
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changeset | 161 | 
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changeset | 162 public boolean isMerging() { | 
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changeset | 163 return !getFirstParent().isNull() && !getSecondParent().isNull() && !isStale(); | 
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changeset | 164 } | 
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changeset | 165 | 
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changeset | 166 /** | 
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changeset | 167 * @return <code>true</code> when recorded merge state doesn't seem to correspond to present working copy | 
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changeset | 168 */ | 
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changeset | 169 public boolean isStale() { | 
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changeset | 170 if (wcp1 == null) { | 
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changeset | 171 throw new HgBadStateException("Call #refresh() first"); | 
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changeset | 172 } | 
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changeset | 173 return !wcp1.equals(stateParent); | 
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changeset | 174 } | 
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changeset | 175 | 
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changeset | 176 public Nodeid getFirstParent() { | 
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changeset | 177 if (wcp1 == null) { | 
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changeset | 178 throw new HgBadStateException("Call #refresh() first"); | 
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changeset | 179 } | 
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changeset | 180 return wcp1; | 
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changeset | 181 } | 
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changeset | 182 | 
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changeset | 183 public Nodeid getSecondParent() { | 
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changeset | 184 if (wcp2 == null) { | 
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changeset | 185 throw new HgBadStateException("Call #refresh() first"); | 
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changeset | 186 } | 
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changeset | 187 return wcp2; | 
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changeset | 188 } | 
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changeset | 189 | 
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changeset | 190 public Nodeid getStateParent() { | 
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changeset | 191 if (stateParent == null) { | 
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changeset | 192 throw new HgBadStateException("Call #refresh() first"); | 
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changeset | 193 } | 
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changeset | 194 return stateParent; | 
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changeset | 195 } | 
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changeset | 196 | 
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changeset | 197 public List<Entry> getConflicts() { | 
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changeset | 198 return entries == null ? Collections.<Entry>emptyList() : Arrays.asList(entries); | 
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changeset | 199 } | 
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changeset | 200 } | 
