annotate src/org/dancres/io/AnnotatingObjectInputStream.java @ 27:511648fa4d64 Version 2.1

Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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1 package org.dancres.io;
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2
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3 import java.io.IOException;
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4 import java.io.ObjectInputStream;
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5 import java.io.InputStream;
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6 import java.io.ObjectStreamClass;
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7
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8 import java.util.Map;
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9 import java.util.HashMap;
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10 import java.util.Collection;
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11 import java.util.Collections;
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12 import java.util.logging.Logger;
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13 import java.util.logging.Level;
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14
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15 import net.jini.loader.ClassLoading;
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16
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17 import net.jini.io.ObjectStreamContext;
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18 import net.jini.io.context.IntegrityEnforcement;
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19
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20 /**
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21 Takes a stream of codebase annotations and a second stream of object data
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22 and combines them to produce de-serialized objects. Object verification
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23 can be optionally enabled at construction time.
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24 */
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25 public class AnnotatingObjectInputStream
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26 extends ObjectInputStream implements ObjectStreamContext {
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27
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28 private static final Logger theLogger =
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29 Logger.getLogger("org.dancres.io.AnnotatingObjectInputStream");
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30
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31 private ObjectInputStream theAnnotations;
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32 private ClassLoader theLoader;
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33
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34 private Collection theContext;
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35
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36 private boolean requireIntegrityCheck;
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37
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38 private static final Map thePrimitiveClasses = new HashMap();
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39 static {
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40 thePrimitiveClasses.put("boolean", boolean.class);
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41 thePrimitiveClasses.put("byte", byte.class);
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42 thePrimitiveClasses.put("char", char.class);
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43 thePrimitiveClasses.put("short", short.class);
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44 thePrimitiveClasses.put("int", int.class);
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45 thePrimitiveClasses.put("long", long.class);
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46 thePrimitiveClasses.put("float", float.class);
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47 thePrimitiveClasses.put("double", double.class);
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48 thePrimitiveClasses.put("void", void.class);
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49 }
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50
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51 public AnnotatingObjectInputStream(ClassLoader aLoader,
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52 InputStream anObjStream,
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53 InputStream anAnnStream,
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54 final boolean checkIntegrity)
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55 throws IOException {
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56
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57 super(anObjStream);
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58 theAnnotations = new ObjectInputStream(anAnnStream);
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59 theLoader = aLoader;
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60 requireIntegrityCheck = checkIntegrity;
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61
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62 theContext =
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63 Collections.singleton(
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64 new IntegrityEnforcement() {
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65 public boolean integrityEnforced() {
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66 return checkIntegrity;
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67 }
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68 }
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69 );
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70 }
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71
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72 public Collection getObjectStreamContext() {
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73 return theContext;
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74 }
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75
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76 private String getAnnotation() throws IOException, ClassNotFoundException {
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77 return (String) theAnnotations.readObject();
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78 }
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79
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80 protected Class resolveClass(ObjectStreamClass aClassDesc)
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81 throws IOException, ClassNotFoundException {
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82
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83 String myAnnotation = getAnnotation();
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84 String myClassName = aClassDesc.getName();
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85
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86 Class myClass = (Class) thePrimitiveClasses.get(myClassName);
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87
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88 if (myClass != null)
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89 return myClass;
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90
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91 if (theLogger.isLoggable(Level.FINEST)) {
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92 theLogger.log(Level.FINEST, "Attempting to load " + myClassName +
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93 ".class from " + myAnnotation);
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94 }
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95
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96 return ClassLoading.loadClass(myAnnotation, myClassName, theLoader,
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97 requireIntegrityCheck, null);
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98 }
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99
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100 protected Class resolveProxyClass(String[] aListOfInterfaces)
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101 throws IOException, ClassNotFoundException {
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102
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103 String myAnnotation = getAnnotation();
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104
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105 return ClassLoading.loadProxyClass(myAnnotation, aListOfInterfaces,
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106 theLoader, requireIntegrityCheck,
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107 null);
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108 }
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109
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110 public void close() throws IOException {
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111 super.close();
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112 theAnnotations.close();
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113 }
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114 }