Examples of com.esotericsoftware.kryo.io.Output

com.esotericsoftware.kryo.io.Output
An OutputStream that buffers data in a byte array and optionally flushes to another OutputStream. Utility methods are provided for efficiently writing primitive types and strings. Encoding of integers: BIG_ENDIAN is used for storing fixed native size integer values LITTLE_ENDIAN is used for a variable length encoding of integer values @author Nathan Sweet

  }


  public void testSmallBuffers () throws Exception {
    ByteBuffer buf = ByteBuffer.allocate(1024);
    ByteBufferOutputStream byteBufferOutputStream = new ByteBufferOutputStream(buf);
    Output testOutput = new Output(byteBufferOutputStream);
    testOutput.writeBytes(new byte[512]);
    testOutput.writeBytes(new byte[512]);
    testOutput.flush();


    ByteBufferInputStream testInputs = new ByteBufferInputStream();
    buf.flip();
    testInputs.setByteBuffer(buf);
    Input input = new Input(testInputs, 512);

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    input.readBytes(toRead);
  }


  public void testVerySmallBuffers() throws Exception {
          Output out1 = new Output(4, -1);
          Output out2 = new ByteBufferOutput(4, -1);


          for (int i = 0; i < 16; i++) {
                out1.writeVarInt(92, false);
          }


          for (int i = 0; i < 16; i++) {
                out2.writeVarInt(92, false);
          }
          
          assertEquals(out1.toBytes(), out2.toBytes());
  }

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          assertEquals(out1.toBytes(), out2.toBytes());
  }
  
  public void testZeroLengthOutputs() throws Exception {
    Output output = new Output(0, 10000);
    kryo.writeClassAndObject(output, "Test string");


    Output byteBufferOutput = new ByteBufferOutput(0, 10000);
    kryo.writeClassAndObject(byteBufferOutput, "Test string");
  }

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   public void testReadResolve () {
      kryo.setRegistrationRequired(false);
      kryo.addDefaultSerializer(Externalizable.class, ExternalizableSerializer.class);


      ReadResolvable test = new ReadResolvable("foobar");
      Output output = new Output(1024);
      kryo.writeClassAndObject(output, test);
      output.flush();


      Input input = new Input(output.getBuffer());
      Object result = kryo.readClassAndObject(input);
      input.close();


      // ensure read resolve happened!
      assertEquals(String.class, result.getClass());

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      test2.intField = 54321;


      List list = new ArrayList();
      list.add(test1);
      list.add(test2);
      Output output = new Output(1024);
      kryo.writeClassAndObject(output, list);
      output.flush();


      Input input = new Input(output.getBuffer());
      List result = (List)kryo.readClassAndObject(input);
      input.close();


      // ensure read resolve happened!
      assertEquals(result.get(0), test1.value);

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    kryoWithoutF.register(B.class);
    kryoWithoutF.register(C.class);
    kryoWithoutF.register(D.class);
    kryoWithoutF.register(E.class);


    Output output = new Output(512);
    try {
      kryoWithoutF.writeClassAndObject(output, c);
      fail("Should have failed because F is not registered.");
    } catch (KryoException ignored) {
    }


    kryo.register(A.class);
    kryo.register(B.class);
    kryo.register(C.class);
    kryo.register(D.class);
    kryo.register(E.class);
    kryo.register(F.class);
    kryo.setRegistrationRequired(true);


    output.clear();
    kryo.writeClassAndObject(output, c);
    output.flush();
    assertEquals(14, output.total());


    Input input = new Input(output.getBuffer());
    kryo.readClassAndObject(input);


    try {
      input.setPosition(0);
      kryoWithoutF.readClassAndObject(input);

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  public void testClassSerializer() {
    kryo.register(Class.class);
    kryo.register(ArrayList.class);
    kryo.setRegistrationRequired(false);
    final Output out = new Output(1024);


    kryo.writeObject(out, String.class);
    kryo.writeObject(out, Integer.class);
    kryo.writeObject(out, Short.class);
    kryo.writeObject(out, Long.class);
    kryo.writeObject(out, Double.class);
    kryo.writeObject(out, Float.class);
    kryo.writeObject(out, Boolean.class);
    kryo.writeObject(out, Character.class);
    kryo.writeObject(out, Void.class);


    kryo.writeObject(out, int.class);
    kryo.writeObject(out, short.class);
    kryo.writeObject(out, long.class);
    kryo.writeObject(out, double.class);
    kryo.writeObject(out, float.class);
    kryo.writeObject(out, boolean.class);
    kryo.writeObject(out, char.class);
    kryo.writeObject(out, void.class);
    kryo.writeObject(out, ArrayList.class);
    kryo.writeObject(out, TestEnum.class);


    final Input in = new Input(out.getBuffer());


    assertEquals(String.class, kryo.readObject(in, Class.class));
    assertEquals(Integer.class, kryo.readObject(in, Class.class));
    assertEquals(Short.class, kryo.readObject(in, Class.class));
    assertEquals(Long.class, kryo.readObject(in, Class.class));

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      }
    });
    
    return roundTripWithStreamFactory(length, object1, new StreamFactory() {
      public Output createOutput(OutputStream os) {
        return new Output(os);
      }


      public Output createOutput(OutputStream os, int size) {
        return new Output(os, size);
      }


      public Output createOutput(int size, int limit) {
        return new Output(size, limit);
      }


      public Input createInput(InputStream os, int size) {
        return new Input(os, size);
      }

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    kryo.register(HashMap.class);


    HasGenerics test = new HasGenerics();
    test.map.put("moo", new Integer[] {1, 2});


    output = new Output(4096);
    kryo.writeClassAndObject(output, test);
    output.flush();


    input = new Input(output.toBytes());
    HasGenerics test2 = (HasGenerics)kryo.readClassAndObject(input);

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    Kryo kryo = new Kryo();
    kryo.register(HashMap.class, new MapSerializer());
    kryo.register(ConcurrentHashMap.class, new MapSerializer());


    Output output = new Output(2048, -1);
    kryo.writeClassAndObject(output, map);
    output.close();


    Input input = new Input(output.toBytes());
    Object deserialized = kryo.readClassAndObject(input);
    input.close();


    Assert.assertEquals(map, deserialized);
  }

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