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org.apache.jcs.engine.CacheUtils |
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1 | package org.apache.jcs.engine; |
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2 | ||
3 | /* |
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4 | * Licensed to the Apache Software Foundation (ASF) under one |
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5 | * or more contributor license agreements. See the NOTICE file |
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6 | * distributed with this work for additional information |
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7 | * regarding copyright ownership. The ASF licenses this file |
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8 | * to you under the Apache License, Version 2.0 (the |
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9 | * "License"); you may not use this file except in compliance |
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10 | * with the License. You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, |
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15 | * software distributed under the License is distributed on an |
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16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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17 | * KIND, either express or implied. See the License for the |
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18 | * specific language governing permissions and limitations |
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19 | * under the License. |
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20 | */ |
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21 | ||
22 | import java.io.ByteArrayInputStream; |
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23 | import java.io.ByteArrayOutputStream; |
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24 | import java.io.IOException; |
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25 | import java.io.ObjectInputStream; |
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26 | import java.io.ObjectOutputStream; |
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27 | import java.io.Serializable; |
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28 | ||
29 | /** |
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30 | * This will be superceded by the new pluggable serializer infastructure. |
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31 | * <p> |
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32 | * basic utility functions |
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33 | * <p> |
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34 | * TODO move to util |
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35 | */ |
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36 | public final class CacheUtils |
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37 | { |
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38 | /** No instances please. */ |
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39 | private CacheUtils() |
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40 | { |
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41 | 0 | super(); |
42 | 0 | } |
43 | ||
44 | /** |
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45 | * Returns a deeply cloned object. |
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46 | * @param obj |
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47 | * @return |
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48 | * @throws IOException |
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49 | */ |
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50 | public static Serializable dup( Serializable obj ) |
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51 | throws IOException |
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52 | { |
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53 | 0 | return deserialize( serialize( obj ) ); |
54 | } |
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55 | ||
56 | /** |
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57 | * Returns the serialized form of the given object in a byte array. |
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58 | * <p> |
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59 | * @param obj |
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60 | * @return |
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61 | * @throws IOException |
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62 | */ |
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63 | public static byte[] serialize( Serializable obj ) |
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64 | throws IOException |
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65 | { |
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66 | 0 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
67 | 0 | ObjectOutputStream oos = new ObjectOutputStream( baos ); |
68 | try |
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69 | { |
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70 | 0 | oos.writeObject( obj ); |
71 | } |
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72 | finally |
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73 | { |
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74 | 0 | oos.close(); |
75 | 0 | } |
76 | 0 | return baos.toByteArray(); |
77 | } |
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78 | ||
79 | /** |
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80 | * Returns the object deserialized from the given byte array. |
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81 | * <p> |
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82 | * @param buf |
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83 | * @return |
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84 | * @throws IOException |
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85 | */ |
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86 | public static Serializable deserialize( byte[] buf ) |
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87 | throws IOException |
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88 | { |
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89 | 0 | ByteArrayInputStream bais = new ByteArrayInputStream( buf ); |
90 | 0 | ObjectInputStream ois = new ObjectInputStream( bais ); |
91 | try |
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92 | { |
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93 | 0 | return (Serializable) ois.readObject(); |
94 | } |
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95 | 0 | catch ( ClassNotFoundException ex ) |
96 | { |
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97 | // impossible case. |
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98 | 0 | ex.printStackTrace(); |
99 | 0 | throw new IllegalStateException( ex.getMessage() ); |
100 | } |
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101 | finally |
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102 | { |
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103 | 0 | ois.close(); |
104 | 0 | } |
105 | } |
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106 | } |
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