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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 import java.io.ByteArrayInputStream;
     18 import java.io.ByteArrayOutputStream;
     19 import java.io.IOException;
     20 import java.io.ObjectInputStream;
     21 import java.io.ObjectOutputStream;
     22 import java.io.Serializable;
     23 
     24 /**
     25  * Exercise serialization.
     26  */
     27 public class Main {
     28 
     29     public static void main(String[] args) {
     30         testObjectSerialization();
     31     }
     32 
     33     static void testObjectSerialization() {
     34         byte[] serialData;
     35 
     36         try {
     37             serialData = createStream();
     38             checkStream(serialData);
     39         } catch (IOException ioe) {
     40             throw new RuntimeException(ioe);
     41         }
     42     }
     43 
     44     static byte[] createStream() throws IOException {
     45         ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
     46         ObjectOutputStream objStream = new ObjectOutputStream(byteStream);
     47 
     48         Sub sub = new Sub('X');
     49         objStream.writeObject(sub);
     50         Inner inner = new Inner(0xCAFEF00D);
     51         objStream.writeObject(inner);
     52         byte[] bytes = byteStream.toByteArray();
     53 
     54         objStream.close();
     55         byteStream.close();
     56         return bytes;
     57     }
     58 
     59     static void checkStream(byte[] input) throws IOException {
     60         ByteArrayInputStream byteStream = new ByteArrayInputStream(input);
     61         ObjectInputStream objStream = new ObjectInputStream(byteStream);
     62 
     63         Sub sub;
     64         Inner inner;
     65         try {
     66             sub = (Sub) objStream.readObject();
     67             inner = (Inner) objStream.readObject();
     68         } catch (ClassNotFoundException cnfe) {
     69             throw new RuntimeException(cnfe);
     70         }
     71 
     72         objStream.close();
     73         byteStream.close();
     74 
     75         sub.check();
     76         inner.check();
     77     }
     78 
     79     static class Inner implements Serializable {
     80         private static final long serialVersionUID = 319009;
     81         private final int x;
     82         public Inner (int x) {
     83             this.x = x;
     84         }
     85 
     86         public void check() {
     87             System.out.println("x=" + Integer.toHexString(x));
     88         }
     89     }
     90 }
     91 
     92 class Base implements Serializable {
     93     private static final long serialVersionUID = 12345;
     94 
     95     Boolean one;
     96     Integer two;
     97     String three;
     98 
     99     public Base() {
    100         one = true;
    101         two = Integer.valueOf(2);
    102         three = "three";
    103     }
    104 }
    105 
    106 class Sub extends Base {
    107     private static final long serialVersionUID = 54321;
    108 
    109     Double four;
    110     Float five;
    111     private Byte six = 26;
    112     Character seven = '7';
    113     Short eight;
    114     long nine;
    115     public Character thing;
    116 
    117     public Sub(char thing) {
    118         four = 4.0;
    119         five = 5.0f;
    120         six = 6;
    121         eight = 8;
    122         nine = 9;
    123         this.thing = thing;
    124     }
    125 
    126     public void check() {
    127         System.out.println("one=" + one + " two=" + two + " three=" + three
    128             + " four=" + four + " five=" + five + " six=" + six
    129             + " seven=" + seven + " eight=" + eight + " nine=" + nine
    130             + " thing=" + thing);
    131     }
    132 }
    133