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annotate src/com/tmate/hgkit/ll/HgIgnore.java @ 26:71a9ba42cee8

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Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sun, 09 Jan 2011 15:59:54 +0100
parents 865bf07f381f
children
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15
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1 /*
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2 * Copyright (c) 2010 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 import java.io.BufferedReader;
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7 import java.io.File;
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8 import java.io.FileReader;
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9 import java.io.IOException;
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10 import java.util.Collections;
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11 import java.util.Set;
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12 import java.util.TreeSet;
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13
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14 /**
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15 *
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16 * @author artem
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17 */
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18 public class HgIgnore {
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19
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20 private final LocalHgRepo repo;
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21 private Set<String> entries;
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22
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23 public HgIgnore(LocalHgRepo localRepo) {
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24 this.repo = localRepo;
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25 }
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26
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27 private void read() {
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28 entries = Collections.emptySet();
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29 File hgignoreFile = new File(repo.getRepositoryRoot().getParentFile(), ".hgignore");
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30 if (!hgignoreFile.exists()) {
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31 return;
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32 }
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33 entries = new TreeSet<String>();
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34 try {
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35 BufferedReader fr = new BufferedReader(new FileReader(hgignoreFile));
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36 String line;
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37 while ((line = fr.readLine()) != null) {
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38 // FIXME need to detect syntax:glob and other parameters
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39 entries.add(line.trim()); // shall I account for local paths in the file (i.e. back-slashed on windows)?
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40 }
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41 } catch (IOException ex) {
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42 ex.printStackTrace(); // log warn
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43 }
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44 }
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45
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46 public void reset() {
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47 // FIXME does anyone really need to clear HgIgnore? Perhaps, repo may return new instance each time,
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48 // which is used throughout invocation and then discarded?
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49 entries = null;
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50 }
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51
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52 public boolean isIgnored(String path) {
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53 if (entries == null) {
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54 read();
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55 }
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56 if (entries.contains(path)) {
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57 // easy part
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58 return true;
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59 }
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60 // substrings are memory-friendly
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61 int x = 0, i = path.indexOf('/', 0);
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62 while (i != -1) {
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63 if (entries.contains(path.substring(x, i))) {
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64 return true;
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65 }
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66 // try one with ending slash
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67 if (entries.contains(path.substring(x, i+1))) { // even if i is last index, i+1 is safe here
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68 return true;
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69 }
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70 x = i+1;
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71 i = path.indexOf('/', x);
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72 }
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73 return false;
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74 }
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75 }