org.apache.hadoop.hbase.codec.prefixtree.encode.column

Class ColumnNodeWriter

java.lang.Object

org.apache.hadoop.hbase.codec.prefixtree.encode.column.ColumnNodeWriter

@InterfaceAudience.Private
public class ColumnNodeWriter
extends Object

Column nodes can be either family nodes or qualifier nodes, as both sections encode similarly. The family and qualifier sections of the data block are made of 1 or more of these nodes.

Each node is composed of 3 sections:

• tokenLength: UVInt (normally 1 byte) indicating the number of token bytes
• token[]: the actual token bytes
• parentStartPosition: the offset of the next node from the start of the family or qualifier section

Field Summary

Fields

Modifier and Type	Field and Description
protected PrefixTreeBlockMeta	blockMeta
protected TokenizerNode	builderNode fields
protected ColumnNodeType	nodeType
protected int	parentStartPosition
protected byte[]	token
protected int	tokenLength

Constructor Summary

Constructors

Constructor and Description
ColumnNodeWriter(PrefixTreeBlockMeta blockMeta, TokenizerNode builderNode, ColumnNodeType nodeType) construct

Method Summary

Methods

Modifier and Type	Method and Description
int	getWidthUsingPlaceholderForOffsetWidth(int offsetWidthPlaceholder) This method is called before blockMeta.qualifierOffsetWidth is known, so we pass in a placeholder.
boolean	isRoot() methods
void	setParentStartPosition(int parentStartPosition) get/set
void	setTokenBytes(ByteRange source)
String	toString() standard methods
void	writeBytes(OutputStream os)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

builderNode

protected TokenizerNode builderNode

fields

blockMeta

protected PrefixTreeBlockMeta blockMeta

tokenLength

protected int tokenLength

token

protected byte[] token

parentStartPosition

protected int parentStartPosition

nodeType

protected ColumnNodeType nodeType

Constructor Detail

ColumnNodeWriter

public ColumnNodeWriter(PrefixTreeBlockMeta blockMeta,
                TokenizerNode builderNode,
                ColumnNodeType nodeType)

construct

Method Detail

isRoot

public boolean isRoot()

methods

getWidthUsingPlaceholderForOffsetWidth

public int getWidthUsingPlaceholderForOffsetWidth(int offsetWidthPlaceholder)

This method is called before blockMeta.qualifierOffsetWidth is known, so we pass in a placeholder.

Parameters:

offsetWidthPlaceholder - the placeholder

Returns:

node width

writeBytes

public void writeBytes(OutputStream os)
                throws IOException

Throws:

IOException

setTokenBytes

public void setTokenBytes(ByteRange source)

toString

public String toString()

standard methods

Overrides:

toString in class Object

setParentStartPosition

public void setParentStartPosition(int parentStartPosition)

get/set