Mercurial > hg4j
annotate src/com/tmate/hgkit/ll/HgDirstate.java @ 10:382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
|---|---|
| date | Sat, 25 Dec 2010 21:50:12 +0100 | 
| parents | |
| children | d46773d89a19 | 
| rev | line source | 
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| 10 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 1 /* | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 2 * Copyright (c) 2010 Artem Tikhomirov | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 3 */ | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 4 package com.tmate.hgkit.ll; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 5 | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 6 import java.io.File; | 
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changeset | 7 import java.io.IOException; | 
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changeset | 8 import java.util.Collections; | 
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changeset | 9 import java.util.Date; | 
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changeset | 10 import java.util.LinkedList; | 
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changeset | 11 import java.util.List; | 
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changeset | 12 | 
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changeset | 13 import com.tmate.hgkit.fs.DataAccess; | 
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changeset | 14 import com.tmate.hgkit.fs.DataAccessProvider; | 
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changeset | 15 | 
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changeset | 16 /** | 
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changeset | 17 * @see http://mercurial.selenic.com/wiki/DirState | 
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changeset | 18 * @see http://mercurial.selenic.com/wiki/FileFormats#dirstate | 
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changeset | 19 * @author artem | 
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changeset | 20 */ | 
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changeset | 21 public class HgDirstate { | 
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changeset | 22 | 
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changeset | 23 private final LocalHgRepo repo; | 
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changeset | 24 private final File dirstateFile; | 
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changeset | 25 private List<Record> normal; | 
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changeset | 26 private List<Record> added; | 
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changeset | 27 private List<Record> removed; | 
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changeset | 28 private List<Record> merged; | 
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changeset | 29 | 
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changeset | 30 public HgDirstate(LocalHgRepo hgRepo, File dirstate) { | 
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changeset | 31 this.repo = hgRepo; | 
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changeset | 32 this.dirstateFile = dirstate; | 
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changeset | 33 } | 
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changeset | 34 | 
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changeset | 35 private void read() { | 
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changeset | 36 normal = added = removed = merged = Collections.emptyList(); | 
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changeset | 37 if (!dirstateFile.exists()) { | 
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changeset | 38 return; | 
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changeset | 39 } | 
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changeset | 40 DataAccessProvider dap = repo.getDataAccess(); | 
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changeset | 41 DataAccess da = dap.create(dirstateFile); | 
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changeset | 42 if (da.isEmpty()) { | 
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changeset | 43 return; | 
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changeset | 44 } | 
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changeset | 45 normal = new LinkedList<Record>(); | 
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changeset | 46 added = new LinkedList<Record>(); | 
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changeset | 47 removed = new LinkedList<Record>(); | 
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changeset | 48 merged = new LinkedList<Record>(); | 
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changeset | 49 try { | 
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changeset | 50 // XXX skip(40) if we don't need these? | 
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changeset | 51 byte[] parents = new byte[40]; | 
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changeset | 52 da.readBytes(parents, 0, 40); | 
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changeset | 53 parents = null; | 
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changeset | 54 do { | 
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changeset | 55 final byte state = da.readByte(); | 
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changeset | 56 final int fmode = da.readInt(); | 
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changeset | 57 final int size = da.readInt(); | 
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changeset | 58 final int time = da.readInt(); | 
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changeset | 59 final int nameLen = da.readInt(); | 
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changeset | 60 String fn1 = null, fn2 = null; | 
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changeset | 61 byte[] name = new byte[nameLen]; | 
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changeset | 62 da.readBytes(name, 0, nameLen); | 
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changeset | 63 for (int i = 0; i < nameLen; i++) { | 
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changeset | 64 if (name[i] == 0) { | 
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changeset | 65 fn1 = new String(name, 0, i); | 
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changeset | 66 fn2 = new String(name, i+1, nameLen); | 
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changeset | 67 break; | 
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changeset | 68 } | 
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changeset | 69 } | 
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changeset | 70 if (fn1 == null) { | 
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changeset | 71 fn1 = new String(name); | 
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changeset | 72 } | 
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changeset | 73 Record r = new Record(fmode, size, time, fn1, fn2); | 
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changeset | 74 if (state == 'n') { | 
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changeset | 75 normal.add(r); | 
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changeset | 76 } else if (state == 'a') { | 
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changeset | 77 added.add(r); | 
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changeset | 78 } else if (state == 'r') { | 
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changeset | 79 removed.add(r); | 
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changeset | 80 } else if (state == 'm') { | 
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changeset | 81 merged.add(r); | 
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changeset | 82 } else { | 
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changeset | 83 // FIXME log error? | 
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changeset | 84 } | 
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changeset | 85 } while (!da.isEmpty()); | 
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changeset | 86 } catch (IOException ex) { | 
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changeset | 87 ex.printStackTrace(); // FIXME log error, clean dirstate? | 
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changeset | 88 } finally { | 
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changeset | 89 da.done(); | 
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changeset | 90 } | 
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changeset | 91 } | 
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changeset | 92 | 
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changeset | 93 public void dump() { | 
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changeset | 94 read(); | 
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changeset | 95 @SuppressWarnings("unchecked") | 
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changeset | 96 List<Record>[] all = new List[] { normal, added, removed, merged }; | 
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changeset | 97 char[] x = new char[] {'n', 'a', 'r', 'm' }; | 
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changeset | 98 for (int i = 0; i < all.length; i++) { | 
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changeset | 99 for (Record r : all[i]) { | 
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changeset | 100 System.out.printf("%c %3o%6d %30tc\t\t%s", x[i], r.mode, r.size, (long) r.time, r.name1); | 
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changeset | 101 if (r.name2 != null) { | 
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changeset | 102 System.out.printf(" --> %s", r.name2); | 
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changeset | 103 } | 
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changeset | 104 System.out.println(); | 
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changeset | 105 } | 
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changeset | 106 System.out.println(); | 
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changeset | 107 } | 
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changeset | 108 } | 
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changeset | 109 | 
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changeset | 110 private static class Record { | 
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changeset | 111 final int mode; | 
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changeset | 112 final int size; | 
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changeset | 113 final int time; | 
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changeset | 114 final String name1; | 
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changeset | 115 final String name2; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
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changeset | 116 | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 117 public Record(int fmode, int fsize, int ftime, String name1, String name2) { | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 118 mode = fmode; | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 119 size = fsize; | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 120 time = ftime; | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 121 this.name1 = name1; | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 122 this.name2 = name2; | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 123 | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 124 } | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 125 } | 
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382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff
changeset | 126 } | 
