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annotate src/com/tmate/hgkit/ll/HgManifest.java @ 19:40532cdc92fc

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Inspector (visitor) for manifest
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 04 Jan 2011 01:01:39 +0100
parents 254078595653
children 11cfabe692b3
rev   line source
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df8c67f3006a Basic manifest parsing to analyze what's in there
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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1 /*
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2 * Copyright (c) 2010, 2011 Artem Tikhomirov
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3 */
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4 package com.tmate.hgkit.ll;
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5
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6 /**
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7 *
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8 * @author artem
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9 */
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10 public class HgManifest extends Revlog {
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12 private final RevlogStream content;
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14 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content) {
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15 super(hgRepo);
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16 this.content = content;
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17 }
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19 public void walk(int start, int end, final Inspector inspector) {
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20 Revlog.Inspector insp = new Revlog.Inspector() {
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22 private boolean gtg = true; // good to go
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23
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24 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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25 if (!gtg) {
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26 return;
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27 }
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28 gtg = gtg && inspector.begin(revisionNumber, new Nodeid(nodeid));
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29 int i;
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30 String fname = null;
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31 String flags = null;
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32 Nodeid nid = null;
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33 for (i = 0; gtg && i < actualLen; i++) {
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34 int x = i;
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35 for( ; data[i] != '\n' && i < actualLen; i++) {
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36 if (fname == null && data[i] == 0) {
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37 fname = new String(data, x, i - x);
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38 x = i+1;
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39 }
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40 }
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41 if (i < actualLen) {
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42 assert data[i] == '\n';
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43 int nodeidLen = i - x < 40 ? i-x : 40;
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44 nid = Nodeid.fromAscii(data, x, nodeidLen);
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45 if (nodeidLen + x < i) {
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46 // 'x' and 'l' for executable bits and symlinks?
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47 // hg --debug manifest shows 644 for each regular file in my repo
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48 flags = new String(data, x + nodeidLen, i-x-nodeidLen);
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49 }
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50 gtg = gtg && inspector.next(nid, fname, flags);
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51
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52 }
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53 nid = null;
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54 fname = flags = null;
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55 }
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56 gtg = gtg && inspector.end(revisionNumber);
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57 }
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58 };
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59 content.iterate(start, end, true, insp);
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60 }
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62 public interface Inspector {
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63 boolean begin(int revision, Nodeid nid);
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64 boolean next(Nodeid nid, String fname, String flags);
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65 boolean end(int revision);
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66 }
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67 }