PrefixTreeCell (Hortonworks Data Platform Apache HBase Java API Reference)

java.lang.Object
- org.apache.hadoop.hbase.codec.prefixtree.decode.PrefixTreeCell

All Implemented Interfaces:

Comparable<Cell>, Cell, SettableSequenceId

Direct Known Subclasses:

PrefixTreeArrayScanner
```
@InterfaceAudience.Private
public class PrefixTreeCell
extends Object
implements Cell, SettableSequenceId, Comparable<Cell>
```
As the PrefixTreeArrayScanner moves through the tree bytes, it changes the values in the fields of this class so that Cell logic can be applied, but without allocating new memory for every Cell iterated through.

Field Summary

Fields
Modifier and Type	Field and Description
`protected int`	`absoluteValueOffset`
`protected byte[]`	`block` fields
`static KeyValue.Type`	`DEFAULT_TYPE`
`protected byte[]`	`familyBuffer`
`protected int`	`familyLength`
`protected int`	`familyOffset`
`protected boolean`	`includeMvccVersion`
`protected Long`	`mvccVersion`
`protected byte[]`	`qualifierBuffer`
`protected int`	`qualifierLength`
`protected int`	`qualifierOffset`
`protected byte[]`	`rowBuffer`
`protected int`	`rowLength`
`protected byte[]`	`tagsBuffer`
`protected int`	`tagsLength`
`protected int`	`tagsOffset`
`protected Long`	`timestamp`
`protected KeyValue.Type`	`type`
`static KeyValue.Type[]`	`TYPES` static
`protected int`	`valueLength`

Constructor Summary

Constructors
Constructor and Description

PrefixTreeCell()

Constructors
Constructor and Description
`PrefixTreeCell()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`compareTo(Cell other)`
`boolean`	`equals(Object obj)`
`byte[]`	`getFamily()` WARNING do not use, expensive.
`byte[]`	`getFamilyArray()` Contiguous bytes composed of legal HDFS filename characters which may start at any index in the containing array.
`byte`	`getFamilyLength()`
`int`	`getFamilyOffset()`
`protected String`	`getKeyValueString()` Need this separate method so we can call it from subclasses' toString() methods
`long`	`getMvccVersion()`
`byte[]`	`getQualifier()` WARNING do not use, expensive.
`byte[]`	`getQualifierArray()` Contiguous raw bytes that may start at any index in the containing array.
`int`	`getQualifierLength()`
`int`	`getQualifierOffset()`
`byte[]`	`getRow()` WARNING do not use, expensive.
`byte[]`	`getRowArray()` Contiguous raw bytes that may start at any index in the containing array.
`short`	`getRowLength()`
`int`	`getRowOffset()`
`long`	`getSequenceId()` A region-specific unique monotonically increasing sequence ID given to each Cell.
`byte[]`	`getTagsArray()`
`int`	`getTagsLength()`
`int`	`getTagsOffset()`
`long`	`getTimestamp()`
`byte`	`getTypeByte()`
`byte[]`	`getValue()` WARNING do not use, expensive.
`byte[]`	`getValueArray()` Contiguous raw bytes that may start at any index in the containing array.
`int`	`getValueLength()`
`int`	`getValueOffset()`
`int`	`hashCode()`
`void`	`setSequenceId(long seqId)` Sets with the given seqId.
`String`	`toString()` For debugging.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - TYPES
```
public static final KeyValue.Type[] TYPES
```
    static
  - DEFAULT_TYPE
```
public static final KeyValue.Type DEFAULT_TYPE
```
  - block
```
protected byte[] block
```
    fields
  - includeMvccVersion
```
protected boolean includeMvccVersion
```
  - rowBuffer
```
protected byte[] rowBuffer
```
  - rowLength
```
protected int rowLength
```
  - familyBuffer
```
protected byte[] familyBuffer
```
  - familyOffset
```
protected int familyOffset
```
  - familyLength
```
protected int familyLength
```
  - qualifierBuffer
```
protected byte[] qualifierBuffer
```
  - qualifierOffset
```
protected int qualifierOffset
```
  - qualifierLength
```
protected int qualifierLength
```
  - timestamp
```
protected Long timestamp
```
  - mvccVersion
```
protected Long mvccVersion
```
  - type
```
protected KeyValue.Type type
```
  - absoluteValueOffset
```
protected int absoluteValueOffset
```
  - valueLength
```
protected int valueLength
```
  - tagsBuffer
```
protected byte[] tagsBuffer
```
  - tagsOffset
```
protected int tagsOffset
```
  - tagsLength
```
protected int tagsLength
```
- Constructor Detail
  - PrefixTreeCell
```
public PrefixTreeCell()
```
- Method Detail
  - toString
```
public String toString()
```
    For debugging. Currently creates new KeyValue to utilize its toString() method.
    
    Overrides:
    
    toString in class Object
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - compareTo
```
public int compareTo(Cell other)
```
    Specified by:
    
    compareTo in interface Comparable<Cell>
  - getTimestamp
```
public long getTimestamp()
```
    Specified by:
    
    getTimestamp in interface Cell
    
    Returns:
    
    Long value representing time at which this cell was "Put" into the row. Typically represents the time of insertion, but can be any value from 0 to Long.MAX_VALUE.
  - getMvccVersion
```
public long getMvccVersion()
```
    Specified by:
    
    getMvccVersion in interface Cell
    
    Returns:
    
    mvccVersion (always >= 0 if exists), or 0 if it no longer exists
  - getSequenceId
```
public long getSequenceId()
```
    Description copied from interface: Cell
    
    A region-specific unique monotonically increasing sequence ID given to each Cell. It always exists for cells in the memstore but is not retained forever. It will be kept for HConstants.KEEP_SEQID_PERIOD days, but generally becomes irrelevant after the cell's row is no longer involved in any operations that require strict consistency.
    
    Specified by:
    
    getSequenceId in interface Cell
    
    Returns:
    
    seqId (always > 0 if exists), or 0 if it no longer exists
  - getValueLength
```
public int getValueLength()
```
    Specified by:
    
    getValueLength in interface Cell
    
    Returns:
    
    Number of value bytes. Must be < valueArray.length - offset.
  - getRowArray
```
public byte[] getRowArray()
```
    Description copied from interface: Cell
    
    Contiguous raw bytes that may start at any index in the containing array. Max length is Short.MAX_VALUE which is 32,767 bytes.
    
    Specified by:
    
    getRowArray in interface Cell
    
    Returns:
    
    The array containing the row bytes.
  - getRowOffset
```
public int getRowOffset()
```
    Specified by:
    
    getRowOffset in interface Cell
    
    Returns:
    
    Array index of first row byte
  - getRowLength
```
public short getRowLength()
```
    Specified by:
    
    getRowLength in interface Cell
    
    Returns:
    
    Number of row bytes. Must be < rowArray.length - offset.
  - getFamilyArray
```
public byte[] getFamilyArray()
```
    Description copied from interface: Cell
    
    Contiguous bytes composed of legal HDFS filename characters which may start at any index in the containing array. Max length is Byte.MAX_VALUE, which is 127 bytes.
    
    Specified by:
    
    getFamilyArray in interface Cell
    
    Returns:
    
    the array containing the family bytes.
  - getFamilyOffset
```
public int getFamilyOffset()
```
    Specified by:
    
    getFamilyOffset in interface Cell
    
    Returns:
    
    Array index of first family byte
  - getFamilyLength
```
public byte getFamilyLength()
```
    Specified by:
    
    getFamilyLength in interface Cell
    
    Returns:
    
    Number of family bytes. Must be < familyArray.length - offset.
  - getQualifierArray
```
public byte[] getQualifierArray()
```
    Description copied from interface: Cell
    
    Contiguous raw bytes that may start at any index in the containing array. Max length is Short.MAX_VALUE which is 32,767 bytes.
    
    Specified by:
    
    getQualifierArray in interface Cell
    
    Returns:
    
    The array containing the qualifier bytes.
  - getQualifierOffset
```
public int getQualifierOffset()
```
    Specified by:
    
    getQualifierOffset in interface Cell
    
    Returns:
    
    Array index of first qualifier byte
  - getQualifierLength
```
public int getQualifierLength()
```
    Specified by:
    
    getQualifierLength in interface Cell
    
    Returns:
    
    Number of qualifier bytes. Must be < qualifierArray.length - offset.
  - getValueArray
```
public byte[] getValueArray()
```
    Description copied from interface: Cell
    
    Contiguous raw bytes that may start at any index in the containing array. Max length is Integer.MAX_VALUE which is 2,147,483,648 bytes.
    
    Specified by:
    
    getValueArray in interface Cell
    
    Returns:
    
    The array containing the value bytes.
  - getValueOffset
```
public int getValueOffset()
```
    Specified by:
    
    getValueOffset in interface Cell
    
    Returns:
    
    Array index of first value byte
  - getTypeByte
```
public byte getTypeByte()
```
    Specified by:
    
    getTypeByte in interface Cell
    
    Returns:
    
    The byte representation of the KeyValue.TYPE of this cell: one of Put, Delete, etc
  - getValue
```
public byte[] getValue()
```
    Description copied from interface: Cell
    
    WARNING do not use, expensive. This gets an arraycopy of the cell's value. Added to ease transition from 0.94 -> 0.96.
    
    Specified by:
    
    getValue in interface Cell
  - getFamily
```
public byte[] getFamily()
```
    Description copied from interface: Cell
    
    WARNING do not use, expensive. This gets an arraycopy of the cell's family. Added to ease transition from 0.94 -> 0.96.
    
    Specified by:
    
    getFamily in interface Cell
  - getQualifier
```
public byte[] getQualifier()
```
    Description copied from interface: Cell
    
    WARNING do not use, expensive. This gets an arraycopy of the cell's qualifier. Added to ease transition from 0.94 -> 0.96.
    
    Specified by:
    
    getQualifier in interface Cell
  - getRow
```
public byte[] getRow()
```
    Description copied from interface: Cell
    
    WARNING do not use, expensive. this gets an arraycopy of the cell's row. Added to ease transition from 0.94 -> 0.96.
    
    Specified by:
    
    getRow in interface Cell
  - getKeyValueString
```
protected String getKeyValueString()
```
    Need this separate method so we can call it from subclasses' toString() methods
  - getTagsOffset
```
public int getTagsOffset()
```
    Specified by:
    
    getTagsOffset in interface Cell
    
    Returns:
    
    the first offset where the tags start in the Cell
  - getTagsLength
```
public int getTagsLength()
```
    Specified by:
    
    getTagsLength in interface Cell
    
    Returns:
    
    the total length of the tags in the Cell.
  - getTagsArray
```
public byte[] getTagsArray()
```
    Specified by:
    
    getTagsArray in interface Cell
    
    Returns:
    
    the tags byte array
  - setSequenceId
```
public void setSequenceId(long seqId)
```
    Description copied from interface: SettableSequenceId
    
    Sets with the given seqId.
    
    Specified by:
    
    setSequenceId in interface SettableSequenceId

Class PrefixTreeCell

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

TYPES

DEFAULT_TYPE

block

includeMvccVersion

rowBuffer

rowLength

familyBuffer

familyOffset

familyLength

qualifierBuffer

qualifierOffset

qualifierLength

timestamp

mvccVersion

type

absoluteValueOffset

valueLength

tagsBuffer

tagsOffset

tagsLength

Constructor Detail

PrefixTreeCell

Method Detail

toString

equals

hashCode

compareTo

getTimestamp

getMvccVersion

getSequenceId

getValueLength

getRowArray

getRowOffset

getRowLength

getFamilyArray

getFamilyOffset

getFamilyLength

getQualifierArray

getQualifierOffset

getQualifierLength

getValueArray

getValueOffset

getTypeByte

getValue

getFamily

getQualifier

getRow

getKeyValueString

getTagsOffset

getTagsLength

getTagsArray

setSequenceId