@Test
 public void testGetKeyMethods() throws Exception {
   KeyValue kvCell = new KeyValue(row1, fam1, qual1, 0l, Type.Put, row1, tags);
   ByteBuffer buf = ByteBuffer.allocateDirect(kvCell.getKeyLength());
   ByteBufferUtils.copyFromArrayToBuffer(
       buf, kvCell.getBuffer(), kvCell.getKeyOffset(), kvCell.getKeyLength());
   ByteBufferedCell offheapKeyOnlyKV = new ByteBufferedKeyOnlyKeyValue(buf, 0, buf.capacity());
   assertEquals(
       ROW1,
       ByteBufferUtils.toStringBinary(
           offheapKeyOnlyKV.getRowByteBuffer(),
           offheapKeyOnlyKV.getRowPositionInByteBuffer(),
           offheapKeyOnlyKV.getRowLength()));
   assertEquals(
       FAM1,
       ByteBufferUtils.toStringBinary(
           offheapKeyOnlyKV.getFamilyByteBuffer(),
           offheapKeyOnlyKV.getFamilyPositionInByteBuffer(),
           offheapKeyOnlyKV.getFamilyLength()));
   assertEquals(
       QUAL1,
       ByteBufferUtils.toStringBinary(
           offheapKeyOnlyKV.getQualifierByteBuffer(),
           offheapKeyOnlyKV.getQualifierPositionInByteBuffer(),
           offheapKeyOnlyKV.getQualifierLength()));
   assertEquals(0L, offheapKeyOnlyKV.getTimestamp());
   assertEquals(Type.Put.getCode(), offheapKeyOnlyKV.getTypeByte());
 }
  @Test
  public void testByteBufferBackedKeyValue() throws Exception {
    KeyValue kvCell = new KeyValue(row1, fam1, qual1, 0l, Type.Put, row1);
    ByteBuffer buf = ByteBuffer.allocateDirect(kvCell.getBuffer().length);
    ByteBufferUtils.copyFromArrayToBuffer(buf, kvCell.getBuffer(), 0, kvCell.getBuffer().length);
    ByteBufferedCell offheapKV = new OffheapKeyValue(buf, 0, buf.capacity(), false, 0l);
    assertEquals(
        ROW1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getRowByteBuffer(),
            offheapKV.getRowPositionInByteBuffer(),
            offheapKV.getRowLength()));
    assertEquals(
        FAM1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getFamilyByteBuffer(),
            offheapKV.getFamilyPositionInByteBuffer(),
            offheapKV.getFamilyLength()));
    assertEquals(
        QUAL1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getQualifierByteBuffer(),
            offheapKV.getQualifierPositionInByteBuffer(),
            offheapKV.getQualifierLength()));
    assertEquals(
        ROW1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getValueByteBuffer(),
            offheapKV.getValuePositionInByteBuffer(),
            offheapKV.getValueLength()));
    assertEquals(0L, offheapKV.getTimestamp());
    assertEquals(Type.Put.getCode(), offheapKV.getTypeByte());

    // Use the array() APIs
    assertEquals(
        ROW1,
        Bytes.toStringBinary(
            offheapKV.getRowArray(), offheapKV.getRowOffset(), offheapKV.getRowLength()));
    assertEquals(
        FAM1,
        Bytes.toStringBinary(
            offheapKV.getFamilyArray(), offheapKV.getFamilyOffset(), offheapKV.getFamilyLength()));
    assertEquals(
        QUAL1,
        Bytes.toStringBinary(
            offheapKV.getQualifierArray(),
            offheapKV.getQualifierOffset(),
            offheapKV.getQualifierLength()));
    assertEquals(
        ROW1,
        Bytes.toStringBinary(
            offheapKV.getValueArray(), offheapKV.getValueOffset(), offheapKV.getValueLength()));
    assertEquals(0L, offheapKV.getTimestamp());
    assertEquals(Type.Put.getCode(), offheapKV.getTypeByte());

    kvCell = new KeyValue(row1, fam2, qual2, 0l, Type.Put, row1);
    buf = ByteBuffer.allocateDirect(kvCell.getBuffer().length);
    ByteBufferUtils.copyFromArrayToBuffer(buf, kvCell.getBuffer(), 0, kvCell.getBuffer().length);
    offheapKV = new OffheapKeyValue(buf, 0, buf.capacity(), false, 0l);
    assertEquals(
        FAM2,
        ByteBufferUtils.toStringBinary(
            offheapKV.getFamilyByteBuffer(),
            offheapKV.getFamilyPositionInByteBuffer(),
            offheapKV.getFamilyLength()));
    assertEquals(
        QUAL2,
        ByteBufferUtils.toStringBinary(
            offheapKV.getQualifierByteBuffer(),
            offheapKV.getQualifierPositionInByteBuffer(),
            offheapKV.getQualifierLength()));
    byte[] nullQualifier = new byte[0];
    kvCell = new KeyValue(row1, fam1, nullQualifier, 0L, Type.Put, row1);
    buf = ByteBuffer.allocateDirect(kvCell.getBuffer().length);
    ByteBufferUtils.copyFromArrayToBuffer(buf, kvCell.getBuffer(), 0, kvCell.getBuffer().length);
    offheapKV = new OffheapKeyValue(buf, 0, buf.capacity(), false, 0l);
    assertEquals(
        ROW1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getRowByteBuffer(),
            offheapKV.getRowPositionInByteBuffer(),
            offheapKV.getRowLength()));
    assertEquals(
        FAM1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getFamilyByteBuffer(),
            offheapKV.getFamilyPositionInByteBuffer(),
            offheapKV.getFamilyLength()));
    assertEquals(
        "",
        ByteBufferUtils.toStringBinary(
            offheapKV.getQualifierByteBuffer(),
            offheapKV.getQualifierPositionInByteBuffer(),
            offheapKV.getQualifierLength()));
    assertEquals(
        ROW1,
        ByteBufferUtils.toStringBinary(
            offheapKV.getValueByteBuffer(),
            offheapKV.getValuePositionInByteBuffer(),
            offheapKV.getValueLength()));
    assertEquals(0L, offheapKV.getTimestamp());
    assertEquals(Type.Put.getCode(), offheapKV.getTypeByte());
  }
 @Test
 public void testByteBufferBackedKeyValueWithTags() throws Exception {
   KeyValue kvCell = new KeyValue(row1, fam1, qual1, 0l, Type.Put, row1, tags);
   ByteBuffer buf = ByteBuffer.allocateDirect(kvCell.getBuffer().length);
   ByteBufferUtils.copyFromArrayToBuffer(buf, kvCell.getBuffer(), 0, kvCell.getBuffer().length);
   ByteBufferedCell offheapKV = new OffheapKeyValue(buf, 0, buf.capacity(), true, 0l);
   assertEquals(
       ROW1,
       ByteBufferUtils.toStringBinary(
           offheapKV.getRowByteBuffer(),
           offheapKV.getRowPositionInByteBuffer(),
           offheapKV.getRowLength()));
   assertEquals(
       FAM1,
       ByteBufferUtils.toStringBinary(
           offheapKV.getFamilyByteBuffer(),
           offheapKV.getFamilyPositionInByteBuffer(),
           offheapKV.getFamilyLength()));
   assertEquals(
       QUAL1,
       ByteBufferUtils.toStringBinary(
           offheapKV.getQualifierByteBuffer(),
           offheapKV.getQualifierPositionInByteBuffer(),
           offheapKV.getQualifierLength()));
   assertEquals(
       ROW1,
       ByteBufferUtils.toStringBinary(
           offheapKV.getValueByteBuffer(),
           offheapKV.getValuePositionInByteBuffer(),
           offheapKV.getValueLength()));
   assertEquals(0L, offheapKV.getTimestamp());
   assertEquals(Type.Put.getCode(), offheapKV.getTypeByte());
   // change tags to handle both onheap and offheap stuff
   List<Tag> resTags =
       Tag.asList(offheapKV.getTagsArray(), offheapKV.getTagsOffset(), offheapKV.getTagsLength());
   Tag tag1 = resTags.get(0);
   assertEquals(t1.getType(), tag1.getType());
   assertEquals(Bytes.toString(t1.getValue()), Bytes.toString(getTagValue(tag1)));
   Tag tag2 = resTags.get(1);
   assertEquals(tag2.getType(), tag2.getType());
   assertEquals(Bytes.toString(t2.getValue()), Bytes.toString(getTagValue(tag2)));
   Tag res = Tag.getTag(offheapKV.getTagsArray(), 0, offheapKV.getTagsLength(), (byte) 2);
   assertEquals(Bytes.toString(t2.getValue()), Bytes.toString(getTagValue(tag2)));
   res = Tag.getTag(offheapKV.getTagsArray(), 0, offheapKV.getTagsLength(), (byte) 3);
   assertNull(res);
 }