Examples of com.esotericsoftware.kryo.io.UnsafeOutput

com.esotericsoftware.kryo.io.UnsafeOutput
An optimized OutputStream that buffers data in a byte array and optionally flushes to another OutputStream. Utility methods are provided for efficiently writing primitive types, arrays of primitive types and strings. It uses @link{java.misc.Unsafe} to achieve a very good performance.
Important notes:
This class increases performance, but may result in bigger size of serialized representation.
Bulk operations, e.g. on arrays of primitive types, are always using native byte order.
Fixed-size int, long, short, float and double elements are always written using native byte order.
Best performance is achieved if no variable length encoding for integers is used.
Output serialized using this class should always be deserilized using @link{UnsafeInput}

        51, 52, 53, 54, 55, 56, 57, 58, //
        61, 62, 63, 64, 65}, buffer.toBytes());
  }


  public void testStrings () throws IOException {
    runStringTest(new UnsafeOutput(4096));
    runStringTest(new UnsafeOutput(897));
    runStringTest(new UnsafeOutput(new ByteArrayOutputStream()));


    UnsafeOutput write = new UnsafeOutput(21);
    String value = "abcdef\u00E1\u00E9\u00ED\u00F3\u00FA\u1234";
    write.writeString(value);
    Input read = new UnsafeInput(write.toBytes());
    assertEquals(value, read.readString());


    runStringTest(127);
    runStringTest(256);
    runStringTest(1024 * 1023);

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    runStringTest(1024 * 1026);
    runStringTest(1024 * 1024 * 2);
  }


  public void runStringTest (int length) throws IOException {
    UnsafeOutput write = new UnsafeOutput(1024, -1);
    StringBuilder buffer = new StringBuilder();
    for (int i = 0; i < length; i++)
      buffer.append((char)i);


    String value = buffer.toString();
    write.writeString(value);
    write.writeString(value);
    Input read = new UnsafeInput(write.toBytes());
    assertEquals(value, read.readString());
    assertEquals(value, read.readStringBuilder().toString());


    write.clear();
    write.writeString(buffer);
    write.writeString(buffer);
    read = new UnsafeInput(write.toBytes());
    assertEquals(value, read.readStringBuilder().toString());
    assertEquals(value, read.readString());


    if (length <= 127) {
      write.clear();
      write.writeAscii(value);
      write.writeAscii(value);
      read = new UnsafeInput(write.toBytes());
      assertEquals(value, read.readStringBuilder().toString());
      assertEquals(value, read.readString());
    }
  }

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    for (int i = 0; i < 127; i++)
      assertEquals(String.valueOf((char)i) + "abc", read.readStringBuilder().toString());
  }


  public void testCanReadInt () throws IOException {
    UnsafeOutput write = new UnsafeOutput(new ByteArrayOutputStream());


    Input read = new UnsafeInput(write.toBytes());
    assertEquals(false, read.canReadInt());


    write.writeVarInt(400, true);


    read = new UnsafeInput(write.toBytes());
    assertEquals(true, read.canReadInt());
    read.setLimit(read.limit() - 1);
    assertEquals(false, read.canReadInt());
  }

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    read.setLimit(read.limit() - 1);
    assertEquals(false, read.canReadInt());
  }


  public void testInts () throws IOException {
    runIntTest(new UnsafeOutput(4096));
    runIntTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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      assertEquals(value, read.readInt(false));
    }
  }


  public void testLongs () throws IOException {
    runLongTest(new UnsafeOutput(4096));
    runLongTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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      assertEquals("Element " + i, value, read.readLong(false));
    }
  }


  public void testShorts () throws IOException {
    runShortTest(new UnsafeOutput(4096));
    runShortTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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    assertEquals(-16384, read.readShort());
    assertEquals(-32768, read.readShort());
  }


  public void testFloats () throws IOException {
    runFloatTest(new UnsafeOutput(4096));
    runFloatTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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    assertEquals(read.readFloat(1000, false), -8192f);
    assertEquals(read.readFloat(1000, true), -8192f);
  }


  public void testDoubles () throws IOException {
    runDoubleTest(new UnsafeOutput(4096));
    runDoubleTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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    assertEquals(read.readDouble(1000, true), -8192d);
    assertEquals(1.23456d, read.readDouble());
  }


  public void testBooleans () throws IOException {
    runBooleanTest(new UnsafeOutput(4096));
    runBooleanTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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      assertEquals(false, read.readBoolean());
    }
  }


  public void testChars () throws IOException {
    runCharTest(new UnsafeOutput(4096));
    runCharTest(new UnsafeOutput(new ByteArrayOutputStream()));
  }

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