Class ArrayByteBuffer

classpath/java/nio/ArrayByteBuffer.java:13–92

package java.nio;

class ArrayByteBuffer extends ByteBuffer {
  private final byte[] array;
  private final int arrayOffset;

  ArrayByteBuffer(byte[] array, int offset, int length, boolean readOnly) {
    super(readOnly);

    this.array = array;
    this.arrayOffset = offset;
    this.capacity = length;
    this.limit = length;
    this.position = 0;
  }

  public ByteBuffer asReadOnlyBuffer() {
    ByteBuffer b = new ArrayByteBuffer(array, arrayOffset, capacity, true);
    b.position(position());
    b.limit(limit());
    return b;
  }

  public boolean hasArray() {
    return true;
  }

  public byte[] array() {
    return array;
  }

  public ByteBuffer slice() {
    return new ArrayByteBuffer
      (array, arrayOffset + position, remaining(), true);
  }

  public int arrayOffset() {
    return arrayOffset;
  }

  protected void doPut(int position, byte val) {
    array[arrayOffset + position] = val;
  }

  public ByteBuffer put(ByteBuffer src) {
    int length = src.remaining();
    checkPut(position, length, false);
    src.get(array, arrayOffset + position, length);
    position += length;
    return this;
  }

  public ByteBuffer put(byte[] src, int offset, int length) {
    checkPut(position, length, false);

    System.arraycopy(src, offset, array, arrayOffset + position, length);
    position += length;

    return this;
  }