Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/FileContentSupplier.java @ 686:f1f095e42555
Annotated file is not always changed in the latest changeset, need to find out last changest it was changed at (iow, diffed to with BlameHelper)
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 25 Jul 2013 22:12:14 +0200 (2013-07-25) |
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1 /* |
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2 * Copyright (c) 2013 TMate Software Ltd |
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3 * |
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4 * This program is free software; you can redistribute it and/or modify |
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5 * it under the terms of the GNU General Public License as published by |
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6 * the Free Software Foundation; version 2 of the License. |
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7 * |
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8 * This program is distributed in the hope that it will be useful, |
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 * GNU General Public License for more details. |
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12 * |
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13 * For information on how to redistribute this software under |
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14 * the terms of a license other than GNU General Public License |
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15 * contact TMate Software at support@hg4j.com |
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16 */ |
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17 package org.tmatesoft.hg.internal; |
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18 |
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19 import java.io.File; |
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20 import java.io.FileInputStream; |
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21 import java.io.IOException; |
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22 import java.nio.ByteBuffer; |
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23 import java.nio.channels.FileChannel; |
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24 |
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25 import org.tmatesoft.hg.core.HgIOException; |
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26 import org.tmatesoft.hg.core.SessionContext; |
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27 import org.tmatesoft.hg.internal.DataSerializer.DataSource; |
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28 import org.tmatesoft.hg.repo.HgRepository; |
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29 import org.tmatesoft.hg.util.Path; |
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30 |
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31 /** |
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32 * {@link DataSource} that reads from regular files |
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33 * |
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34 * @author Artem Tikhomirov |
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35 * @author TMate Software Ltd. |
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36 */ |
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37 public class FileContentSupplier implements DataSource { |
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38 private final File file; |
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39 private final SessionContext ctx; |
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40 |
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41 public FileContentSupplier(HgRepository repo, Path file) { |
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42 this(repo, new File(repo.getWorkingDir(), file.toString())); |
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43 } |
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44 |
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45 public FileContentSupplier(SessionContext.Source ctxSource, File f) { |
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46 ctx = ctxSource.getSessionContext(); |
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47 file = f; |
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48 } |
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49 |
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50 public void serialize(DataSerializer out) throws HgIOException { |
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51 FileInputStream fis = null; |
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52 try { |
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53 fis = new FileInputStream(file); |
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54 FileChannel fc = fis.getChannel(); |
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55 ByteBuffer buffer = ByteBuffer.allocate((int) Math.min(100*1024, fc.size())); |
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56 while (fc.read(buffer) != -1) { |
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57 buffer.flip(); |
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58 // #allocate() above ensures backing array |
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59 out.write(buffer.array(), 0, buffer.limit()); |
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60 buffer.clear(); |
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61 } |
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62 } catch (IOException ex) { |
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63 throw new HgIOException("Failed to get content of the file", ex, file); |
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64 } finally { |
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65 new FileUtils(ctx.getLog(), this).closeQuietly(fis); |
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66 } |
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67 } |
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68 |
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69 public int serializeLength() { |
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70 return Internals.ltoi(file.length()); |
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71 } |
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72 } |