RowNodeReader (Hortonworks Data Platform Apache HBase Java API Reference)

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

```
@InterfaceAudience.Private
public class RowNodeReader
extends Object
```
Position one of these appropriately in the data block and you can call its methods to retrieve information necessary to decode the cells in the row.

Field Summary

Fields
Modifier and Type	Field and Description
`protected byte[]`	`block` fields
`protected int`	`familyOffsetsOffset`
`protected int`	`fanIndex`
`protected int`	`fanOffset`
`protected int`	`fanOut`
`protected int`	`mvccVersionIndexesOffset`
`protected int`	`nextNodeOffsetsOffset`
`protected int`	`numCells`
`protected int`	`offset`
`protected int`	`operationTypesOffset`
`protected int`	`qualifierOffsetsOffset`
`protected int`	`tagOffsetsOffset`
`protected int`	`timestampIndexesOffset`
`protected int`	`tokenLength`
`protected int`	`tokenOffset`
`protected int`	`valueLengthsOffset`
`protected int`	`valueOffsetsOffset`

Constructor Summary

Constructors
Constructor and Description

RowNodeReader()

Constructors
Constructor and Description
`RowNodeReader()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`getBranchNubLeafIndicator()`
`int`	`getColumnOffset(int index, PrefixTreeBlockMeta blockMeta)`
`int`	`getFamilyOffset(int index, PrefixTreeBlockMeta blockMeta)`
`byte`	`getFanByte(int i)`
`protected String`	`getFanByteReadable(int i)` for debugging
`int`	`getFanIndex()`
`int`	`getFanOut()`
`int`	`getLastCellIndex()`
`int`	`getLastFanIndex()`
`int`	`getMvccVersionIndex(int index, PrefixTreeBlockMeta blockMeta)`
`int`	`getNextNodeOffset(int index, PrefixTreeBlockMeta blockMeta)`
`int`	`getNumCells()`
`int`	`getOffset()`
`int`	`getTagOffset(int index, PrefixTreeBlockMeta blockMeta)`
`int`	`getTimestampIndex(int index, PrefixTreeBlockMeta blockMeta)`
`byte[]`	`getToken()`
`int`	`getTokenArrayOffset()`
`int`	`getTokenLength()`
`int`	`getType(int index, PrefixTreeBlockMeta blockMeta)`
`int`	`getValueLength(int index, PrefixTreeBlockMeta blockMeta)`
`int`	`getValueOffset(int index, PrefixTreeBlockMeta blockMeta)`
`boolean`	`hasChildren()`
`boolean`	`hasFan()`
`boolean`	`hasMoreFanNodes()`
`boolean`	`hasOccurrences()`
`boolean`	`hasPreviousFanNodes()`
`void`	`initOnBlock(PrefixTreeBlockMeta blockMeta, byte[] block, int offset)` construct
`boolean`	`isBranch()`
`boolean`	`isLeaf()` methods
`boolean`	`isNub()`
`boolean`	`isOnLastFanNode()`
`void`	`resetFanIndex()`
`void`	`setFanIndex(int fanIndex)`
`String`	`toString()` standard methods
`int`	`whichFanNode(byte searchForByte)`

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

Field Detail

block
```
protected byte[] block
```
fields

offset
```
protected int offset
```

fanIndex
```
protected int fanIndex
```

numCells
```
protected int numCells
```

tokenOffset
```
protected int tokenOffset
```

tokenLength
```
protected int tokenLength
```

fanOffset
```
protected int fanOffset
```

fanOut
```
protected int fanOut
```

familyOffsetsOffset
```
protected int familyOffsetsOffset
```

qualifierOffsetsOffset
```
protected int qualifierOffsetsOffset
```

timestampIndexesOffset
```
protected int timestampIndexesOffset
```

mvccVersionIndexesOffset
```
protected int mvccVersionIndexesOffset
```

operationTypesOffset
```
protected int operationTypesOffset
```

valueOffsetsOffset
```
protected int valueOffsetsOffset
```

valueLengthsOffset
```
protected int valueLengthsOffset
```

tagOffsetsOffset
```
protected int tagOffsetsOffset
```

nextNodeOffsetsOffset
```
protected int nextNodeOffsetsOffset
```

Constructor Detail
- RowNodeReader
```
public RowNodeReader()
```

Method Detail

initOnBlock

public void initOnBlock(PrefixTreeBlockMeta blockMeta,
                        byte[] block,
                        int offset)

construct

isLeaf
```
public boolean isLeaf()
```
methods

isNub
```
public boolean isNub()
```

isBranch
```
public boolean isBranch()
```

hasOccurrences
```
public boolean hasOccurrences()
```

getTokenArrayOffset
```
public int getTokenArrayOffset()
```

getTokenLength
```
public int getTokenLength()
```

getFanByte
```
public byte getFanByte(int i)
```

getFanByteReadable

protected String getFanByteReadable(int i)

for debugging

getFamilyOffset

public int getFamilyOffset(int index,
                           PrefixTreeBlockMeta blockMeta)

getColumnOffset

public int getColumnOffset(int index,
                           PrefixTreeBlockMeta blockMeta)

getTagOffset

public int getTagOffset(int index,
                        PrefixTreeBlockMeta blockMeta)

getTimestampIndex

public int getTimestampIndex(int index,
                             PrefixTreeBlockMeta blockMeta)

getMvccVersionIndex

public int getMvccVersionIndex(int index,
                               PrefixTreeBlockMeta blockMeta)

getType

public int getType(int index,
                   PrefixTreeBlockMeta blockMeta)

getValueOffset

public int getValueOffset(int index,
                          PrefixTreeBlockMeta blockMeta)

getValueLength

public int getValueLength(int index,
                          PrefixTreeBlockMeta blockMeta)

getNextNodeOffset

public int getNextNodeOffset(int index,
                             PrefixTreeBlockMeta blockMeta)

getBranchNubLeafIndicator

public String getBranchNubLeafIndicator()

hasChildren
```
public boolean hasChildren()
```

getLastFanIndex
```
public int getLastFanIndex()
```

getLastCellIndex
```
public int getLastCellIndex()
```

getNumCells
```
public int getNumCells()
```

getFanOut
```
public int getFanOut()
```

getToken
```
public byte[] getToken()
```

getOffset
```
public int getOffset()
```

whichFanNode

public int whichFanNode(byte searchForByte)

resetFanIndex
```
public void resetFanIndex()
```

getFanIndex
```
public int getFanIndex()
```

setFanIndex

public void setFanIndex(int fanIndex)

hasFan
```
public boolean hasFan()
```

hasPreviousFanNodes
```
public boolean hasPreviousFanNodes()
```

hasMoreFanNodes
```
public boolean hasMoreFanNodes()
```

isOnLastFanNode
```
public boolean isOnLastFanNode()
```

toString
```
public String toString()
```
standard methods

Overrides:

toString in class Object

Class RowNodeReader

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

block

offset

fanIndex

numCells

tokenOffset

tokenLength

fanOffset

fanOut

familyOffsetsOffset

qualifierOffsetsOffset

timestampIndexesOffset

mvccVersionIndexesOffset

operationTypesOffset

valueOffsetsOffset

valueLengthsOffset

tagOffsetsOffset

nextNodeOffsetsOffset

Constructor Detail

RowNodeReader

Method Detail

initOnBlock

isLeaf

isNub

isBranch

hasOccurrences

getTokenArrayOffset

getTokenLength

getFanByte

getFanByteReadable

getFamilyOffset

getColumnOffset

getTagOffset

getTimestampIndex

getMvccVersionIndex

getType

getValueOffset

getValueLength

getNextNodeOffset

getBranchNubLeafIndicator

hasChildren

getLastFanIndex

getLastCellIndex

getNumCells

getFanOut

getToken

getOffset

whichFanNode

resetFanIndex

getFanIndex

setFanIndex

hasFan

hasPreviousFanNodes

hasMoreFanNodes

isOnLastFanNode

toString