src/test/examplesJava11/buffercovariantreturntype/BufferCovariantReturnTypeMain.java

// Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package buffercovariantreturntype;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.nio.ShortBuffer;

public class BufferCovariantReturnTypeMain {

  public static void main(String[] args) {
    byteBufferTest();
    charBufferTest();
    shortBufferTest();
    intBufferTest();
    longBufferTest();
    floatBufferTest();
    doubleBufferTest();
  }

  static void byteBufferTest() {
    byte[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    byte putValue = 55;

    ByteBuffer directBuffer = ByteBuffer.wrap(data);
    Buffer indirectBuffer = ByteBuffer.wrap(data);
    ByteBuffer castedIndirectBuffer = (ByteBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }

  static void charBufferTest() {
    char[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    char putValue = 55;

    CharBuffer directBuffer = CharBuffer.wrap(data);
    Buffer indirectBuffer = CharBuffer.wrap(data);
    CharBuffer castedIndirectBuffer = (CharBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }

  static void shortBufferTest() {
    short[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    short putValue = 55;

    ShortBuffer directBuffer = ShortBuffer.wrap(data);
    Buffer indirectBuffer = ShortBuffer.wrap(data);
    ShortBuffer castedIndirectBuffer = (ShortBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }

  static void intBufferTest() {
    int[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    int putValue = 55;

    IntBuffer directBuffer = IntBuffer.wrap(data);
    Buffer indirectBuffer = IntBuffer.wrap(data);
    IntBuffer castedIndirectBuffer = (IntBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }

  static void longBufferTest() {
    long[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    long putValue = 55;

    LongBuffer directBuffer = LongBuffer.wrap(data);
    Buffer indirectBuffer = LongBuffer.wrap(data);
    LongBuffer castedIndirectBuffer = (LongBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }

  static void floatBufferTest() {
    float[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    float putValue = 55;

    FloatBuffer directBuffer = FloatBuffer.wrap(data);
    Buffer indirectBuffer = FloatBuffer.wrap(data);
    FloatBuffer castedIndirectBuffer = (FloatBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }

  static void doubleBufferTest() {
    double[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
    double putValue = 55;

    DoubleBuffer directBuffer = DoubleBuffer.wrap(data);
    Buffer indirectBuffer = DoubleBuffer.wrap(data);
    DoubleBuffer castedIndirectBuffer = (DoubleBuffer) indirectBuffer;

    directBuffer = directBuffer.position(5);
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.limit(7);
    System.out.println(directBuffer.remaining()); // 2
    directBuffer = directBuffer.mark().put(putValue).put(putValue).reset();
    System.out.println(directBuffer.position()); // 5
    directBuffer = directBuffer.clear();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 16
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.rewind();
    System.out.println(directBuffer.position()); // 0
    directBuffer.put(putValue);
    directBuffer.put(putValue);
    directBuffer = directBuffer.flip();
    System.out.println(directBuffer.position()); // 0
    System.out.println(directBuffer.remaining()); // 2

    indirectBuffer = indirectBuffer.position(5);
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.limit(7);
    System.out.println(indirectBuffer.remaining()); // 2
    indirectBuffer = indirectBuffer.mark();
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.reset();
    System.out.println(indirectBuffer.position()); // 5
    indirectBuffer = indirectBuffer.clear();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 16
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.rewind();
    System.out.println(indirectBuffer.position()); // 0
    castedIndirectBuffer.put(putValue);
    castedIndirectBuffer.put(putValue);
    indirectBuffer = indirectBuffer.flip();
    System.out.println(indirectBuffer.position()); // 0
    System.out.println(indirectBuffer.remaining()); // 2
  }
}