Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgBundle.java @ 480:f3fab7a20841
Refactor LineReader utility as stanalone class to facilitate reuse
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
|---|---|
| date | Tue, 17 Jul 2012 22:14:21 +0200 | 
| parents | 51d682cf9cdc | 
| children | 10ca3ede8367 | 
| rev | line source | 
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changeset | 1 /* | 
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changeset | 2 * Copyright (c) 2011-2012 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 java.io.File; | 
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changeset | 20 import java.io.IOException; | 
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changeset | 21 | 
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changeset | 22 import org.tmatesoft.hg.core.Nodeid; | 
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changeset | 23 import org.tmatesoft.hg.core.SessionContext; | 
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changeset | 24 import org.tmatesoft.hg.internal.ByteArrayChannel; | 
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changeset | 25 import org.tmatesoft.hg.internal.ByteArrayDataAccess; | 
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changeset | 26 import org.tmatesoft.hg.internal.DataAccess; | 
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changeset | 27 import org.tmatesoft.hg.internal.DataAccessProvider; | 
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changeset | 28 import org.tmatesoft.hg.internal.DigestHelper; | 
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changeset | 29 import org.tmatesoft.hg.internal.Experimental; | 
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changeset | 30 import org.tmatesoft.hg.internal.InflaterDataAccess; | 
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changeset | 31 import org.tmatesoft.hg.internal.Patch; | 
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changeset | 32 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset; | 
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changeset | 33 import org.tmatesoft.hg.util.CancelledException; | 
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changeset | 34 | 
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changeset | 35 /** | 
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changeset | 36 * WORK IN PROGRESS | 
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changeset | 37 * | 
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changeset | 38 * @see http://mercurial.selenic.com/wiki/BundleFormat | 
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changeset | 39 * | 
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changeset | 40 * @author Artem Tikhomirov | 
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changeset | 41 * @author TMate Software Ltd. | 
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changeset | 42 */ | 
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changeset | 43 @Experimental(reason="API is not stable") | 
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changeset | 44 public class HgBundle { | 
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changeset | 45 | 
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changeset | 46 private final File bundleFile; | 
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changeset | 47 private final DataAccessProvider accessProvider; | 
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changeset | 48 // private final SessionContext sessionContext; | 
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changeset | 49 | 
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changeset | 50 HgBundle(SessionContext ctx, DataAccessProvider dap, File bundle) { | 
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changeset | 51 // sessionContext = ctx; | 
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changeset | 52 accessProvider = dap; | 
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changeset | 53 bundleFile = bundle; | 
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changeset | 54 } | 
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changeset | 55 | 
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changeset | 56 private DataAccess getDataStream() throws IOException { | 
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changeset | 57 DataAccess da = accessProvider.create(bundleFile); | 
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changeset | 58 byte[] signature = new byte[6]; | 
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changeset | 59 if (da.length() > 6) { | 
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changeset | 60 da.readBytes(signature, 0, 6); | 
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changeset | 61 if (signature[0] == 'H' && signature[1] == 'G' && signature[2] == '1' && signature[3] == '0') { | 
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changeset | 62 if (signature[4] == 'G' && signature[5] == 'Z') { | 
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changeset | 63 return new InflaterDataAccess(da, 6, da.length() - 6); | 
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changeset | 64 } | 
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changeset | 65 if (signature[4] == 'B' && signature[5] == 'Z') { | 
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changeset | 66 throw HgRepository.notImplemented(); | 
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changeset | 67 } | 
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changeset | 68 if (signature[4] != 'U' || signature[5] != 'N') { | 
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changeset | 69 throw new HgInvalidStateException(String.format("Bad bundle signature: %s", String.valueOf(signature))); | 
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changeset | 70 } | 
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changeset | 71 // "...UN", fall-through | 
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changeset | 72 } else { | 
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changeset | 73 da.reset(); | 
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changeset | 74 } | 
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changeset | 75 } | 
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changeset | 76 return da; | 
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changeset | 77 } | 
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changeset | 78 | 
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changeset | 79 private int uses = 0; | 
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changeset | 80 public HgBundle link() { | 
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changeset | 81 uses++; | 
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changeset | 82 return this; | 
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changeset | 83 } | 
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changeset | 84 public void unlink() { | 
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changeset | 85 uses--; | 
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changeset | 86 if (uses == 0 && bundleFile != null) { | 
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changeset | 87 bundleFile.deleteOnExit(); | 
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changeset | 88 } | 
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changeset | 89 } | 
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changeset | 90 public boolean inUse() { | 
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changeset | 91 return uses > 0; | 
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changeset | 92 } | 
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changeset | 93 | 
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changeset | 94 /** | 
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changeset | 95 * Get changes recorded in the bundle that are missing from the supplied repository. | 
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changeset | 96 * @param hgRepo repository that shall possess base revision for this bundle | 
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changeset | 97 * @param inspector callback to get each changeset found | 
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changeset | 98 */ | 
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changeset | 99 public void changes(final HgRepository hgRepo, final HgChangelog.Inspector inspector) throws HgRuntimeException { | 
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changeset | 100 Inspector bundleInsp = new Inspector() { | 
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changeset | 101 DigestHelper dh = new DigestHelper(); | 
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changeset | 102 boolean emptyChangelog = true; | 
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changeset | 103 private DataAccess prevRevContent; | 
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changeset | 104 private int revisionIndex; | 
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changeset | 105 | 
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changeset | 106 public void changelogStart() { | 
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changeset | 107 emptyChangelog = true; | 
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changeset | 108 revisionIndex = 0; | 
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changeset | 109 } | 
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changeset | 110 | 
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changeset | 111 public void changelogEnd() { | 
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changeset | 112 if (emptyChangelog) { | 
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changeset | 113 throw new IllegalStateException("No changelog group in the bundle"); // XXX perhaps, just be silent and/or log? | 
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changeset | 114 } | 
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changeset | 115 } | 
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changeset | 116 | 
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changeset | 117 /* | 
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changeset | 118 * Despite that BundleFormat wiki says: "Each Changelog entry patches the result of all previous patches | 
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changeset | 119 * (the previous, or parent patch of a given patch p is the patch that has a node equal to p's p1 field)", | 
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changeset | 120 * it seems not to hold true. Instead, each entry patches previous one, regardless of whether the one | 
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changeset | 121 * before is its parent (i.e. ge.firstParent()) or not. | 
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changeset | 122 * | 
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changeset | 123 Actual state in the changelog.i | 
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changeset | 124 Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid | 
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changeset | 125 50: 9212 0 209 329 48 50 49 -1 f1db8610da62a3e0beb8d360556ee1fd6eb9885e | 
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changeset | 126 51: 9421 0 278 688 48 51 50 -1 9429c7bd1920fab164a9d2b621d38d57bcb49ae0 | 
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changeset | 127 52: 9699 0 154 179 52 52 50 -1 30bd389788464287cee22ccff54c330a4b715de5 | 
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changeset | 128 53: 9853 0 133 204 52 53 51 52 a6f39e595b2b54f56304470269a936ead77f5725 | 
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changeset | 129 54: 9986 0 156 182 54 54 52 -1 fd4f2c98995beb051070630c272a9be87bef617d | 
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changeset | 130 | 
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changeset | 131 Excerpt from bundle (nodeid, p1, p2, cs): | 
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changeset | 132 f1db8610da62a3e0beb8d360556ee1fd6eb9885e 26e3eeaa39623de552b45ee1f55c14f36460f220 0000000000000000000000000000000000000000 f1db8610da62a3e0beb8d360556ee1fd6eb9885e; patches:4 | 
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changeset | 133 9429c7bd1920fab164a9d2b621d38d57bcb49ae0 f1db8610da62a3e0beb8d360556ee1fd6eb9885e 0000000000000000000000000000000000000000 9429c7bd1920fab164a9d2b621d38d57bcb49ae0; patches:3 | 
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changeset | 134 > 30bd389788464287cee22ccff54c330a4b715de5 f1db8610da62a3e0beb8d360556ee1fd6eb9885e 0000000000000000000000000000000000000000 30bd389788464287cee22ccff54c330a4b715de5; patches:3 | 
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changeset | 135 a6f39e595b2b54f56304470269a936ead77f5725 9429c7bd1920fab164a9d2b621d38d57bcb49ae0 30bd389788464287cee22ccff54c330a4b715de5 a6f39e595b2b54f56304470269a936ead77f5725; patches:3 | 
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changeset | 136 fd4f2c98995beb051070630c272a9be87bef617d 30bd389788464287cee22ccff54c330a4b715de5 0000000000000000000000000000000000000000 fd4f2c98995beb051070630c272a9be87bef617d; patches:3 | 
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changeset | 137 | 
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changeset | 138 To recreate 30bd..e5, one have to take content of 9429..e0, not its p1 f1db..5e | 
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changeset | 139 */ | 
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changeset | 140 public boolean element(GroupElement ge) { | 
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changeset | 141 emptyChangelog = false; | 
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changeset | 142 HgChangelog changelog = hgRepo.getChangelog(); | 
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changeset | 143 try { | 
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changeset | 144 if (prevRevContent == null) { | 
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changeset | 145 if (ge.firstParent().isNull() && ge.secondParent().isNull()) { | 
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changeset | 146 prevRevContent = new ByteArrayDataAccess(new byte[0]); | 
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changeset | 147 } else { | 
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changeset | 148 final Nodeid base = ge.firstParent(); | 
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changeset | 149 if (!changelog.isKnown(base) /*only first parent, that's Bundle contract*/) { | 
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changeset | 150 throw new IllegalStateException(String.format("Revision %s needs a parent %s, which is missing in the supplied repo %s", ge.node().shortNotation(), base.shortNotation(), hgRepo.toString())); | 
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changeset | 151 } | 
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changeset | 152 ByteArrayChannel bac = new ByteArrayChannel(); | 
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changeset | 153 changelog.rawContent(base, bac); // TODO post-1.0 get DataAccess directly, to avoid | 
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changeset | 154 // extra byte[] (inside ByteArrayChannel) duplication just for the sake of subsequent ByteArrayDataChannel wrap. | 
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changeset | 155 prevRevContent = new ByteArrayDataAccess(bac.toArray()); | 
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changeset | 156 } | 
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changeset | 157 } | 
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changeset | 158 // | 
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changeset | 159 byte[] csetContent = ge.apply(prevRevContent); | 
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changeset | 160 dh = dh.sha1(ge.firstParent(), ge.secondParent(), csetContent); // XXX ge may give me access to byte[] content of nodeid directly, perhaps, I don't need DH to be friend of Nodeid? | 
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changeset | 161 if (!ge.node().equalsTo(dh.asBinary())) { | 
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changeset | 162 throw new HgInvalidStateException(String.format("Integrity check failed on %s, node: %s", bundleFile, ge.node().shortNotation())); | 
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changeset | 163 } | 
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changeset | 164 ByteArrayDataAccess csetDataAccess = new ByteArrayDataAccess(csetContent); | 
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changeset | 165 RawChangeset cs = RawChangeset.parse(csetDataAccess); | 
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changeset | 166 inspector.next(revisionIndex++, ge.node(), cs); | 
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changeset | 167 prevRevContent.done(); | 
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changeset | 168 prevRevContent = csetDataAccess.reset(); | 
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changeset | 169 } catch (CancelledException ex) { | 
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changeset | 170 return false; | 
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changeset | 171 } catch (IOException ex) { | 
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changeset | 172 throw new HgInvalidFileException("Invalid bundle file", ex, bundleFile); // TODO post-1.0 revisit exception handling | 
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changeset | 173 } catch (HgInvalidDataFormatException ex) { | 
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changeset | 174 throw new HgInvalidControlFileException("Invalid bundle file", ex, bundleFile); | 
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changeset | 175 } | 
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changeset | 176 return true; | 
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changeset | 177 } | 
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changeset | 178 | 
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changeset | 179 public void manifestStart() {} | 
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changeset | 180 public void manifestEnd() {} | 
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changeset | 181 public void fileStart(String name) {} | 
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changeset | 182 public void fileEnd(String name) {} | 
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changeset | 183 | 
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changeset | 184 }; | 
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changeset | 185 inspectChangelog(bundleInsp); | 
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changeset | 186 } | 
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changeset | 187 | 
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changeset | 188 // callback to minimize amount of Strings and Nodeids instantiated | 
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changeset | 189 public interface Inspector { | 
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changeset | 190 void changelogStart(); | 
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changeset | 191 | 
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changeset | 192 void changelogEnd(); | 
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changeset | 193 | 
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changeset | 194 void manifestStart(); | 
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changeset | 195 | 
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changeset | 196 void manifestEnd(); | 
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changeset | 197 | 
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changeset | 198 void fileStart(String name); | 
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changeset | 199 | 
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changeset | 200 void fileEnd(String name); | 
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changeset | 201 | 
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changeset | 202 /** | 
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changeset | 203 * XXX desperately need exceptions here | 
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changeset | 204 * @param element data element, instance might be reused, don't keep a reference to it or its raw data | 
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changeset | 205 * @return <code>true</code> to continue | 
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changeset | 206 */ | 
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changeset | 207 boolean element(GroupElement element); | 
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changeset | 208 } | 
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changeset | 209 | 
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changeset | 210 /** | 
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changeset | 211 * @param inspector callback to visit changelog entries | 
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changeset | 212 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em> | 
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changeset | 213 * @throws IllegalArgumentException if inspector argument is null | 
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changeset | 214 */ | 
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changeset | 215 public void inspectChangelog(Inspector inspector) throws HgRuntimeException { | 
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changeset | 216 if (inspector == null) { | 
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changeset | 217 throw new IllegalArgumentException(); | 
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changeset | 218 } | 
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changeset | 219 DataAccess da = null; | 
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changeset | 220 try { | 
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changeset | 221 da = getDataStream(); | 
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changeset | 222 internalInspectChangelog(da, inspector); | 
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changeset | 223 } catch (IOException ex) { | 
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changeset | 224 throw new HgInvalidFileException("Bundle.inspectChangelog failed", ex, bundleFile); | 
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changeset | 225 } finally { | 
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changeset | 226 if (da != null) { | 
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changeset | 227 da.done(); | 
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changeset | 228 } | 
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changeset | 229 } | 
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changeset | 230 } | 
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changeset | 231 | 
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changeset | 232 /** | 
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changeset | 233 * @param inspector callback to visit manifest entries | 
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changeset | 234 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em> | 
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changeset | 235 * @throws IllegalArgumentException if inspector argument is null | 
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changeset | 236 */ | 
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changeset | 237 public void inspectManifest(Inspector inspector) throws HgRuntimeException { | 
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changeset | 238 if (inspector == null) { | 
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changeset | 239 throw new IllegalArgumentException(); | 
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changeset | 240 } | 
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changeset | 241 DataAccess da = null; | 
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changeset | 242 try { | 
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changeset | 243 da = getDataStream(); | 
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changeset | 244 if (da.isEmpty()) { | 
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changeset | 245 return; | 
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changeset | 246 } | 
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changeset | 247 skipGroup(da); // changelog | 
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changeset | 248 internalInspectManifest(da, inspector); | 
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changeset | 249 } catch (IOException ex) { | 
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changeset | 250 throw new HgInvalidFileException("Bundle.inspectManifest failed", ex, bundleFile); | 
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changeset | 251 } finally { | 
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changeset | 252 if (da != null) { | 
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changeset | 253 da.done(); | 
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changeset | 254 } | 
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changeset | 255 } | 
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changeset | 256 } | 
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changeset | 257 | 
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changeset | 258 /** | 
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changeset | 259 * @param inspector callback to visit file entries | 
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changeset | 260 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em> | 
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changeset | 261 * @throws IllegalArgumentException if inspector argument is null | 
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changeset | 262 */ | 
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changeset | 263 public void inspectFiles(Inspector inspector) throws HgRuntimeException { | 
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changeset | 264 if (inspector == null) { | 
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changeset | 265 throw new IllegalArgumentException(); | 
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changeset | 266 } | 
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changeset | 267 DataAccess da = null; | 
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changeset | 268 try { | 
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changeset | 269 da = getDataStream(); | 
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changeset | 270 if (da.isEmpty()) { | 
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changeset | 271 return; | 
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changeset | 272 } | 
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changeset | 273 skipGroup(da); // changelog | 
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changeset | 274 if (da.isEmpty()) { | 
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changeset | 275 return; | 
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changeset | 276 } | 
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changeset | 277 skipGroup(da); // manifest | 
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changeset | 278 internalInspectFiles(da, inspector); | 
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changeset | 279 } catch (IOException ex) { | 
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changeset | 280 throw new HgInvalidFileException("Bundle.inspectFiles failed", ex, bundleFile); | 
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changeset | 281 } finally { | 
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changeset | 282 if (da != null) { | 
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changeset | 283 da.done(); | 
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changeset | 284 } | 
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changeset | 285 } | 
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changeset | 286 } | 
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changeset | 287 | 
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changeset | 288 /** | 
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changeset | 289 * @param inspector visit complete bundle (changelog, manifest and file entries) | 
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changeset | 290 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em> | 
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changeset | 291 * @throws IllegalArgumentException if inspector argument is null | 
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changeset | 292 */ | 
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changeset | 293 public void inspectAll(Inspector inspector) throws HgRuntimeException { | 
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changeset | 294 if (inspector == null) { | 
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changeset | 295 throw new IllegalArgumentException(); | 
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changeset | 296 } | 
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changeset | 297 DataAccess da = null; | 
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changeset | 298 try { | 
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changeset | 299 da = getDataStream(); | 
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changeset | 300 internalInspectChangelog(da, inspector); | 
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changeset | 301 internalInspectManifest(da, inspector); | 
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changeset | 302 internalInspectFiles(da, inspector); | 
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changeset | 303 } catch (IOException ex) { | 
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changeset | 304 throw new HgInvalidFileException("Bundle.inspectAll failed", ex, bundleFile); | 
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changeset | 305 } finally { | 
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changeset | 306 if (da != null) { | 
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changeset | 307 da.done(); | 
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changeset | 308 } | 
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changeset | 309 } | 
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changeset | 310 } | 
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changeset | 311 | 
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changeset | 312 private void internalInspectChangelog(DataAccess da, Inspector inspector) throws IOException { | 
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changeset | 313 if (da.isEmpty()) { | 
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changeset | 314 return; | 
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changeset | 315 } | 
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changeset | 316 inspector.changelogStart(); | 
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changeset | 317 readGroup(da, inspector); | 
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changeset | 318 inspector.changelogEnd(); | 
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changeset | 319 } | 
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changeset | 320 | 
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changeset | 321 private void internalInspectManifest(DataAccess da, Inspector inspector) throws IOException { | 
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changeset | 322 if (da.isEmpty()) { | 
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changeset | 323 return; | 
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changeset | 324 } | 
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changeset | 325 inspector.manifestStart(); | 
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changeset | 326 readGroup(da, inspector); | 
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changeset | 327 inspector.manifestEnd(); | 
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changeset | 328 } | 
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changeset | 329 | 
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changeset | 330 private void internalInspectFiles(DataAccess da, Inspector inspector) throws IOException { | 
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changeset | 331 while (!da.isEmpty()) { | 
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changeset | 332 int fnameLen = da.readInt(); | 
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changeset | 333 if (fnameLen <= 4) { | 
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changeset | 334 break; // null chunk, the last one. | 
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changeset | 335 } | 
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changeset | 336 byte[] fnameBuf = new byte[fnameLen - 4]; | 
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changeset | 337 da.readBytes(fnameBuf, 0, fnameBuf.length); | 
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changeset | 338 String name = new String(fnameBuf); | 
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changeset | 339 inspector.fileStart(name); | 
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changeset | 340 readGroup(da, inspector); | 
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changeset | 341 inspector.fileEnd(name); | 
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changeset | 342 } | 
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changeset | 343 } | 
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changeset | 344 | 
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changeset | 345 private static void readGroup(DataAccess da, Inspector inspector) throws IOException { | 
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changeset | 346 int len = da.readInt(); | 
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changeset | 347 boolean good2go = true; | 
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changeset | 348 while (len > 4 && !da.isEmpty() && good2go) { | 
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changeset | 349 byte[] nb = new byte[80]; | 
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changeset | 350 da.readBytes(nb, 0, 80); | 
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changeset | 351 int dataLength = len - 84 /* length field + 4 nodeids */; | 
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changeset | 352 byte[] data = new byte[dataLength]; | 
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changeset | 353 da.readBytes(data, 0, dataLength); | 
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changeset | 354 DataAccess slice = new ByteArrayDataAccess(data); // XXX in fact, may pass a slicing DataAccess. | 
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changeset | 355 // Just need to make sure that we seek to proper location afterwards (where next GroupElement starts), | 
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changeset | 356 // regardless whether that slice has read it or not. | 
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changeset | 357 GroupElement ge = new GroupElement(nb, slice); | 
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changeset | 358 good2go = inspector.element(ge); | 
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changeset | 359 slice.done(); // BADA doesn't implement done(), but it could (e.g. free array) | 
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changeset | 360 /// and we'd better tell it we are not going to use it any more. However, it's important to ensure Inspector | 
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changeset | 361 // implementations out there do not retain GroupElement.rawData() | 
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changeset | 362 len = da.isEmpty() ? 0 : da.readInt(); | 
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changeset | 363 } | 
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changeset | 364 // need to skip up to group end if inspector told he don't want to continue with the group, | 
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changeset | 365 // because outer code may try to read next group immediately as we return back. | 
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changeset | 366 while (len > 4 && !da.isEmpty()) { | 
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changeset | 367 da.skip(len - 4 /* length field */); | 
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changeset | 368 len = da.isEmpty() ? 0 : da.readInt(); | 
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changeset | 369 } | 
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changeset | 370 } | 
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changeset | 371 | 
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changeset | 372 private static void skipGroup(DataAccess da) throws IOException { | 
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changeset | 373 int len = da.readInt(); | 
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changeset | 374 while (len > 4 && !da.isEmpty()) { | 
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changeset | 375 da.skip(len - 4); // sizeof(int) | 
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changeset | 376 len = da.isEmpty() ? 0 : da.readInt(); | 
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changeset | 377 } | 
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changeset | 378 } | 
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changeset | 379 | 
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changeset | 380 @Experimental(reason="Cumbersome API, rawData and apply with byte[] perhaps need replacement with ByteChannel/ByteBuffer, and better Exceptions. Perhaps, shall split into interface and impl") | 
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changeset | 381 public static class GroupElement { | 
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changeset | 382 private final byte[] header; // byte[80] takes 120 bytes, 4 Nodeids - 192 | 
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changeset | 383 private final DataAccess dataAccess; | 
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changeset | 384 private Patch patches; | 
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changeset | 385 | 
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changeset | 386 GroupElement(byte[] fourNodeids, DataAccess rawDataAccess) { | 
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changeset | 387 assert fourNodeids != null && fourNodeids.length == 80; | 
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changeset | 388 header = fourNodeids; | 
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changeset | 389 dataAccess = rawDataAccess; | 
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changeset | 390 } | 
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changeset | 391 | 
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changeset | 392 /** | 
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changeset | 393 * <b>node</b> field of the group element | 
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changeset | 394 * @return node revision, never <code>null</code> | 
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changeset | 395 */ | 
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changeset | 396 public Nodeid node() { | 
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changeset | 397 return Nodeid.fromBinary(header, 0); | 
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changeset | 398 } | 
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changeset | 399 | 
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changeset | 400 /** | 
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changeset | 401 * <b>p1</b> <i>(parent 1)</i> field of the group element | 
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changeset | 402 * @return revision of parent 1, never <code>null</code> | 
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changeset | 403 */ | 
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changeset | 404 public Nodeid firstParent() { | 
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changeset | 405 return Nodeid.fromBinary(header, 20); | 
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changeset | 406 } | 
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changeset | 407 | 
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changeset | 408 /** | 
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changeset | 409 * <b>p2</b> <i>(parent 2)</i> field of the group element | 
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changeset | 410 * @return revision of parent 2, never <code>null</code> | 
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changeset | 411 */ | 
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changeset | 412 public Nodeid secondParent() { | 
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changeset | 413 return Nodeid.fromBinary(header, 40); | 
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changeset | 414 } | 
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changeset | 415 | 
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changeset | 416 /** | 
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changeset | 417 * <b>cs</b> <i>(changeset link)</i> field of the group element | 
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changeset | 418 * @return changeset revision, never <code>null</code> | 
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changeset | 419 */ | 
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changeset | 420 public Nodeid cset() { | 
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changeset | 421 return Nodeid.fromBinary(header, 60); | 
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changeset | 422 } | 
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changeset | 423 | 
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changeset | 424 public byte[] rawDataByteArray() throws IOException { // XXX IOException or HgInvalidFileException? | 
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changeset | 425 return rawData().byteArray(); | 
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changeset | 426 } | 
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changeset | 427 | 
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changeset | 428 public byte[] apply(byte[] baseContent) throws IOException { | 
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changeset | 429 return apply(new ByteArrayDataAccess(baseContent)); | 
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changeset | 430 } | 
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changeset | 431 | 
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changeset | 432 /*package-local*/ DataAccess rawData() { | 
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changeset | 433 return dataAccess; | 
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changeset | 434 } | 
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changeset | 435 | 
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changeset | 436 /*package-local*/ Patch patch() throws IOException { | 
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changeset | 437 if (patches == null) { | 
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changeset | 438 dataAccess.reset(); | 
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changeset | 439 patches = new Patch(); | 
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changeset | 440 patches.read(dataAccess); | 
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changeset | 441 } | 
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changeset | 442 return patches; | 
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changeset | 443 } | 
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changeset | 444 | 
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changeset | 445 /*package-local*/ byte[] apply(DataAccess baseContent) throws IOException { | 
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changeset | 446 return patch().apply(baseContent, -1); | 
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changeset | 447 } | 
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changeset | 448 | 
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changeset | 449 public String toString() { | 
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changeset | 450 int patchCount; | 
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changeset | 451 try { | 
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changeset | 452 patchCount = patch().count(); | 
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changeset | 453 } catch (IOException ex) { | 
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changeset | 454 ex.printStackTrace(); | 
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changeset | 455 patchCount = -1; | 
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changeset | 456 } | 
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changeset | 457 return String.format("%s %s %s %s; patches:%d\n", node().shortNotation(), firstParent().shortNotation(), secondParent().shortNotation(), cset().shortNotation(), patchCount); | 
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changeset | 458 } | 
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changeset | 459 } | 
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changeset | 460 } | 
