org.apache.hadoop.hbase

Class KeyValue.MetaComparator

java.lang.Object

org.apache.hadoop.hbase.KeyValue.KVComparator

org.apache.hadoop.hbase.KeyValue.MetaComparator

All Implemented Interfaces:

Comparator<Cell>, KeyValue.SamePrefixComparator<byte[]>, org.apache.hadoop.io.RawComparator<Cell>

Enclosing class:

KeyValue

public static class KeyValue.MetaComparator
extends KeyValue.KVComparator

A KeyValue.KVComparator for hbase:meta catalog table KeyValues.

Constructor Summary

Constructors

Constructor and Description
KeyValue.MetaComparator()

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	clone()
int	compare(Cell left, Cell right) Compare key portion of a KeyValue for keys in hbase:meta table.
int	compareOnlyKeyPortion(Cell left, Cell right)
protected int	compareRowKey(Cell l, Cell r) Override the row key comparison to parse and compare the meta row key parts.
int	compareRows(byte[] left, int loffset, int llength, byte[] right, int roffset, int rlength) Get the b[],o,l for left and right rowkey portions and compare.
String	getLegacyKeyComparatorName() The HFileV2 file format's trailer contains this class name.
byte[]	getShortMidpointKey(byte[] leftKey, byte[] rightKey) Don't do any fancy Block Index splitting tricks.

Methods inherited from class org.apache.hadoop.hbase.KeyValue.KVComparator

calcIndexKey, compare, compareColumns, compareColumns, compareFamilies, compareFlatKey, compareFlatKey, compareIgnoringPrefix, compareKey, compareRows, compareTimestamps, matchingRowColumn, matchingRows, matchingRows

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

KeyValue.MetaComparator

public KeyValue.MetaComparator()

Method Detail

compare

public int compare(Cell left,
          Cell right)

Compare key portion of a KeyValue for keys in hbase:meta table.

Specified by:

compare in interface Comparator<Cell>

Overrides:

compare in class KeyValue.KVComparator

compareOnlyKeyPortion

public int compareOnlyKeyPortion(Cell left,
                        Cell right)

Overrides:

compareOnlyKeyPortion in class KeyValue.KVComparator

compareRows

public int compareRows(byte[] left,
              int loffset,
              int llength,
              byte[] right,
              int roffset,
              int rlength)

Description copied from class: KeyValue.KVComparator

Get the b[],o,l for left and right rowkey portions and compare.

Overrides:

compareRows in class KeyValue.KVComparator

Returns:

0 if equal, <0 if left smaller, >0 if right smaller

getShortMidpointKey

public byte[] getShortMidpointKey(byte[] leftKey,
                         byte[] rightKey)

Don't do any fancy Block Index splitting tricks.

Overrides:

getShortMidpointKey in class KeyValue.KVComparator

Returns:

0 if equal, <0 if left smaller, >0 if right smaller

getLegacyKeyComparatorName

public String getLegacyKeyComparatorName()

The HFileV2 file format's trailer contains this class name. We reinterpret this and instantiate the appropriate comparator. TODO: With V3 consider removing this.

Overrides:

getLegacyKeyComparatorName in class KeyValue.KVComparator

Returns:

legacy class name for FileFileTrailer#comparatorClassName

clone

protected Object clone()
                throws CloneNotSupportedException

Overrides:

clone in class KeyValue.KVComparator

Throws:

CloneNotSupportedException

compareRowKey

protected int compareRowKey(Cell l,
                Cell r)

Override the row key comparison to parse and compare the meta row key parts.

Overrides:

compareRowKey in class KeyValue.KVComparator

Returns:

0 if equal, <0 if left smaller, >0 if right smaller