Package org.apache.hadoop.hbase

Class NoTagsByteBufferKeyValue

java.lang.Object

org.apache.hadoop.hbase.ByteBufferExtendedCell

org.apache.hadoop.hbase.ByteBufferKeyValue

org.apache.hadoop.hbase.NoTagsByteBufferKeyValue

All Implemented Interfaces:

Cell, ExtendedCell, HeapSize, RawCell

Direct Known Subclasses:

NoTagByteBufferChunkKeyValue, SizeCachedNoTagsByteBufferKeyValue

@Private
public class NoTagsByteBufferKeyValue
extends ByteBufferKeyValue

An extension of the ByteBufferKeyValue where the tags length is always 0

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.Cell

Cell.Type

Field Summary

Fields inherited from class org.apache.hadoop.hbase.ByteBufferKeyValue

buf, FIXED_OVERHEAD, length, offset

Fields inherited from interface org.apache.hadoop.hbase.ExtendedCell

CELL_NOT_BASED_ON_CHUNK

Fields inherited from interface org.apache.hadoop.hbase.RawCell

MAX_TAGS_LENGTH

Constructor Summary

Constructors

Constructor	Description
NoTagsByteBufferKeyValue(ByteBuffer buf, int offset, int length)
NoTagsByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId)

Method Summary

Modifier and Type	Method	Description
ExtendedCell	deepClone()	Does a deep copy of the contents to a new memory area and returns it as a new cell.
int	getSerializedSize(boolean withTags)	KeyValue format
byte[]	getTagsArray()	Contiguous raw bytes representing tags that may start at any index in the containing array.
int	getTagsLength()	HBase internally uses 2 bytes to store tags length in Cell.

Methods inherited from class org.apache.hadoop.hbase.ByteBufferKeyValue

equals, getBuffer, getFamilyArray, getFamilyByteBuffer, getFamilyLength, getFamilyLength, getFamilyLengthPosition, getFamilyLengthPosition, getFamilyOffset, getFamilyPosition, getFamilyPosition, getKeyLength, getOffset, getQualifierArray, getQualifierByteBuffer, getQualifierLength, getQualifierLength, getQualifierOffset, getQualifierPosition, getQualifierPosition, getRowArray, getRowByteBuffer, getRowLength, getRowOffset, getRowPosition, getSequenceId, getSerializedSize, getTagsByteBuffer, getTagsOffset, getTagsPosition, getTimestamp, getTimestamp, getTypeByte, getTypeByte, getValueArray, getValueByteBuffer, getValueLength, getValueOffset, getValuePosition, hashCode, heapSize, setSequenceId, setTimestamp, setTimestamp, toString, write, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.hadoop.hbase.Cell

getType

Methods inherited from interface org.apache.hadoop.hbase.ExtendedCell

getChunkId

Methods inherited from interface org.apache.hadoop.hbase.RawCell

cloneTags, getTag, getTags

Constructor Details

NoTagsByteBufferKeyValue

public NoTagsByteBufferKeyValue(ByteBuffer buf,
 int offset,
 int length)

NoTagsByteBufferKeyValue

public NoTagsByteBufferKeyValue(ByteBuffer buf,
 int offset,
 int length,
 long seqId)

Method Details

getTagsArray

public byte[] getTagsArray()

Description copied from interface: ExtendedCell

Contiguous raw bytes representing tags that may start at any index in the containing array.

Specified by:

getTagsArray in interface Cell

Specified by:

getTagsArray in interface ExtendedCell

Overrides:

getTagsArray in class ByteBufferKeyValue

Returns:

the tags byte array

getTagsLength

public int getTagsLength()

Description copied from interface: ExtendedCell

HBase internally uses 2 bytes to store tags length in Cell. As the tags length is always a non-negative number, to make good use of the sign bit, the max of tags length is defined 2 * Short.MAX_VALUE + 1 = 65535. As a result, the return type is int, because a short is not capable of handling that. Please note that even if the return type is int, the max tags length is far less than Integer.MAX_VALUE.

Specified by:

getTagsLength in interface Cell

Specified by:

getTagsLength in interface ExtendedCell

Overrides:

getTagsLength in class ByteBufferKeyValue

Returns:

the total length of the tags in the Cell.

getSerializedSize

public int getSerializedSize(boolean withTags)

Description copied from interface: ExtendedCell

KeyValue format

<4 bytes keylength> <4 bytes valuelength> <2 bytes rowlength> <row> <1 byte columnfamilylength> <columnfamily> <columnqualifier> <8 bytes timestamp> <1 byte keytype> <value> <2 bytes tagslength> <tags>

Specified by:

getSerializedSize in interface ExtendedCell

Overrides:

getSerializedSize in class ByteBufferKeyValue

Parameters:

withTags - Whether to write tags.

Returns:

Bytes count required to serialize this Cell in a KeyValue format.

deepClone

public ExtendedCell deepClone()

Description copied from interface: ExtendedCell

Does a deep copy of the contents to a new memory area and returns it as a new cell.

Specified by:

deepClone in interface ExtendedCell

Overrides:

deepClone in class ByteBufferKeyValue

Returns:

The deep cloned cell