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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactSerializer.java @ 57:cf9848c85755 0.2

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RELEASE 0.2: Summarized NEWS and Changes artifacts/trunk@338 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Hans Plum <hans.plum@intevation.de>
date Fri, 13 Nov 2009 18:37:51 +0000
parents 5e4bc24ea438
children 48d1a9a082c2
rev   line source
41
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1 package de.intevation.artifactdatabase;
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2
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3 import de.intevation.artifacts.Artifact;
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4 import de.intevation.artifacts.ArtifactSerializer;
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5
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6 import java.io.InputStream;
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7 import java.io.IOException;
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8 import java.io.OutputStream;
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9 import java.io.ObjectInputStream;
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10 import java.io.ObjectOutputStream;
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11 import java.io.ByteArrayOutputStream;
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12 import java.io.ByteArrayInputStream;
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13
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14 import java.util.zip.GZIPOutputStream;
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15 import java.util.zip.GZIPInputStream;
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16
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17 import org.apache.log4j.Logger;
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18
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19 /**
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20 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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21 */
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22 public class DefaultArtifactSerializer
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23 implements ArtifactSerializer
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24 {
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25 private static Logger logger =
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26 Logger.getLogger(DefaultArtifactSerializer.class);
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27
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28 public static final ArtifactSerializer INSTANCE =
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29 new DefaultArtifactSerializer();
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30
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31 public DefaultArtifactSerializer() {
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32 }
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33
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34 public Artifact fromBytes(byte [] bytes) {
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35
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36 if (bytes == null) {
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37 return null;
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38 }
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39
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40 ObjectInputStream ois = null;
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41
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42 try {
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43 ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
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44 GZIPInputStream gis = new GZIPInputStream(bis);
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45 ois = getObjectInputStream(gis);
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46
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47 return (Artifact)ois.readObject();
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48 }
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49 catch (IOException ioe) {
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50 logger.error(ioe.getLocalizedMessage(), ioe);
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51 }
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52 catch (ClassNotFoundException cnfe) {
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53 logger.error(cnfe.getLocalizedMessage(), cnfe);
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54 }
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55 catch (ClassCastException cce) {
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56 logger.error(cce.getLocalizedMessage(), cce);
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57 }
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58 finally {
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59 if (ois != null) {
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60 try { ois.close(); }
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61 catch (IOException ioe) { }
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62 }
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63 }
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64
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65 return null;
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66 }
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67
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68 public byte [] toBytes(Artifact artifact) {
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69 try {
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70 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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71 GZIPOutputStream gos = new GZIPOutputStream(bos);
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72 ObjectOutputStream oos = getObjectOutputStream(gos);
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73
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74 oos.writeObject(artifact);
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75 oos.flush();
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76 oos.close();
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77
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78 return bos.toByteArray();
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79 }
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80 catch (IOException ioe) {
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81 logger.error(ioe.getLocalizedMessage(), ioe);
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82 throw new RuntimeException(ioe);
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83 }
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84 }
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85
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86 protected ObjectInputStream getObjectInputStream(InputStream is)
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87 throws IOException
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88 {
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89 return new ObjectInputStream(is);
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90 }
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91
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92 protected ObjectOutputStream getObjectOutputStream(OutputStream os)
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93 throws IOException
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94 {
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95 return new ObjectOutputStream(os);
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96 }
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97 }
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98 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org