org.apache.hadoop.hbase

类 CellComparatorImpl.MetaCellComparator

java.lang.Object

org.apache.hadoop.hbase.CellComparatorImpl

org.apache.hadoop.hbase.CellComparatorImpl.MetaCellComparator

所有已实现的接口:

Comparator<Cell>, CellComparator

封闭类:

CellComparatorImpl

public static class CellComparatorImpl.MetaCellComparator
extends CellComparatorImpl

A CellComparatorImpl for hbase:meta catalog table KeyValues.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.hbase.CellComparatorImpl

CellComparatorImpl.MetaCellComparator

字段概要

从类继承的字段 org.apache.hadoop.hbase.CellComparatorImpl

COMPARATOR, META_COMPARATOR

构造器概要

构造器

构造器和说明
MetaCellComparator()

方法概要

限定符和类型	方法和说明
int	compare(Cell a, Cell b, boolean ignoreSequenceid) Compare cells.
int	compareRows(Cell left, byte[] right, int roffset, int rlength) Compares the row part of the cell with a simple plain byte[] like the stopRow in Scan.
int	compareRows(Cell left, Cell right) Compares the rows of the left and right cell.
Comparator	getSimpleComparator()

从类继承的方法 org.apache.hadoop.hbase.CellComparatorImpl

compare, compareColumns, compareFamilies, compareQualifiers, compareTimestamps, compareTimestamps, compareWithoutRow

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.CellComparator

getInstance

从接口继承的方法 java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

构造器详细资料

MetaCellComparator

public MetaCellComparator()

方法详细资料

compareRows

public int compareRows(Cell left,
                       Cell right)

从类复制的说明: CellComparatorImpl

Compares the rows of the left and right cell. For the hbase:meta case this method is overridden such that it can handle hbase:meta cells. The caller should ensure using the appropriate comparator for hbase:meta.

指定者:

compareRows 在接口中 CellComparator

覆盖:

compareRows 在类中 CellComparatorImpl

参数:

left - the left hand side cell

right - the right hand side cell

返回:

0 if both cells are equal, 1 if left cell is bigger than right, -1 otherwise

compareRows

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

从类复制的说明: CellComparatorImpl

Compares the row part of the cell with a simple plain byte[] like the stopRow in Scan. This should be used with context where for hbase:meta cells the {CellComparatorImpl.META_COMPARATOR should be used

指定者:

compareRows 在接口中 CellComparator

覆盖:

compareRows 在类中 CellComparatorImpl

参数:

left - the cell to be compared

right - the kv serialized byte[] to be compared with

roffset - the offset in the byte[]

rlength - the length in the byte[]

返回:

0 if both cell and the byte[] are equal, 1 if the cell is bigger than byte[], -1 otherwise

compare

public int compare(Cell a,
                   Cell b,
                   boolean ignoreSequenceid)

从接口复制的说明: CellComparator

Compare cells.

指定者:

compare 在接口中 CellComparator

覆盖:

compare 在类中 CellComparatorImpl

ignoreSequenceid - True if we are to compare the key portion only and ignore the sequenceid. Set to false to compare key and consider sequenceid.

返回:

0 if equal, -1 if a < b, and +1 if a > b.

getSimpleComparator

public Comparator getSimpleComparator()

指定者:

getSimpleComparator 在接口中 CellComparator

覆盖:

getSimpleComparator 在类中 CellComparatorImpl

返回:

A dumbed-down, fast comparator for hbase2 base-type, the ByteBufferKeyValue. Create an instance when you make a new memstore, when you know only BBKVs will be passed. Do not pollute with types other than BBKV if can be helped; the Comparator will slow.