KeyValue.KVComparator (Apache HBase 2.1.0 API)

java.lang.Object
+
- org.apache.hadoop.hbase.KeyValue.KVComparator
+

+
+
所有已实现的接口:
+
Comparator<Cell>, KeyValue.SamePrefixComparator<byte[]>, org.apache.hadoop.io.RawComparator<Cell>
+
+
+
直接已知子类:
+
KeyValue.MetaComparator
+
+
+
封闭类:
+
KeyValue
+
+
+
已过时。 +
: Use CellComparatorImpl. Deprecated for hbase 2.0, remove for hbase 3.0.
+
+
+
```
@Deprecated
+public static class KeyValue.KVComparator
+extends Object
+implements org.apache.hadoop.io.RawComparator<Cell>, KeyValue.SamePrefixComparator<byte[]>
```
+
Compare KeyValues. When we compare KeyValues, we only compare the Key + portion. This means two KeyValues with same Key but different Values are + considered the same as far as this Comparator is concerned.
+

+ +

+ + +
构造器概要
+ + + + + + + + +
构造器
构造器和说明
KVComparator() +
已过时。
+
+

构造器
构造器和说明
`KVComparator()` + 已过时。 +

+ +

方法概要

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

所有方法实例方法具体方法已过时的方法
限定符和类型	方法和说明
`byte[]`	`calcIndexKey(byte[] lastKeyOfPreviousBlock, + byte[] firstKeyInBlock)` + 已过时。 +
`protected Object`	`clone()` + 已过时。 +
`int`	`compare(byte[] l, + int loff, + int llen, + byte[] r, + int roff, + int rlen)` + 已过时。 +
`int`	`compare(Cell left, + Cell right)` + 已过时。 + Compares the Key of a cell -- with fields being more significant in this order: + rowkey, colfam/qual, timestamp, type, mvcc +
`protected int`	`compareColumns(byte[] left, + int loffset, + int lquallength, + byte[] right, + int roffset, + int rquallength)` + 已过时。 +
`protected int`	`compareColumns(byte[] left, + int loffset, + int llength, + int lfamilylength, + byte[] right, + int roffset, + int rlength, + int rfamilylength)` + 已过时。 +
`protected int`	`compareFamilies(byte[] left, + int loffset, + int lfamilylength, + byte[] right, + int roffset, + int rfamilylength)` + 已过时。 +
`int`	`compareFlatKey(byte[] left, + byte[] right)` + 已过时。 +
`int`	`compareFlatKey(byte[] left, + int loffset, + int llength, + byte[] right, + int roffset, + int rlength)` + 已过时。 + Compares left to right assuming that left,loffset,llength and right,roffset,rlength are + full KVs laid out in a flat byte[]s. +
`int`	`compareIgnoringPrefix(int commonPrefix, + byte[] left, + int loffset, + int llength, + byte[] right, + int roffset, + int rlength)` + 已过时。 + Overridden +
`int`	`compareKey(Cell cell, + byte[] row, + int roff, + int rlen, + byte[] fam, + int foff, + int flen, + byte[] col, + int coff, + int clen, + long ts, + byte type)` + 已过时。 +
`int`	`compareOnlyKeyPortion(Cell left, + Cell right)` + 已过时。 +
`protected int`	`compareRowKey(Cell left, + Cell right)` + 已过时。 + Compares the only the user specified portion of a Key. +
`int`	`compareRows(byte[] left, + int loffset, + int llength, + byte[] right, + int roffset, + int rlength)` + 已过时。 + Get the b[],o,l for left and right rowkey portions and compare. +
`int`	`compareRows(Cell left, + Cell right)` + 已过时。 +
`int`	`compareTimestamps(Cell left, + Cell right)` + 已过时。 +
`String`	`getLegacyKeyComparatorName()` + 已过时。 + The HFileV2 file format's trailer contains this class name. +
`byte[]`	`getShortMidpointKey(byte[] leftKey, + byte[] rightKey)` + 已过时。 + Since 0.99.2; + +
`boolean`	`matchingRowColumn(Cell left, + Cell right)` + 已过时。 + Compares the row and column of two keyvalues for equality +
`boolean`	`matchingRows(byte[] left, + int loffset, + int llength, + byte[] right, + int roffset, + int rlength)` + 已过时。 + Compare rows. +
`boolean`	`matchingRows(Cell left, + Cell right)` + 已过时。 + Compares the row of two keyvalues for equality +

+ + +
从类继承的方法 java.lang.Object
+equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

+ + +
从接口继承的方法 java.util.Comparator
+comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, rever seOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

+ +

+ + +
构造器详细资料
+ + + +
- +
  KVComparator
  +
```
public KVComparator()
```
  +
  已过时。
  +
+

+ +

+ + +

方法详细资料

+ + + +

+
getLegacyKeyComparatorName
+
```
public String getLegacyKeyComparatorName()
```
+
已过时。
+
The HFileV2 file format's trailer contains this class name. We reinterpret this and + instantiate the appropriate comparator. + TODO: With V3 consider removing this.
+
+
返回:
+
legacy class name for FileFileTrailer#comparatorClassName
+
+

+ + + +

compare

public int compare(byte[] l,
+                   int loff,
+                   int llen,
+                   byte[] r,
+                   int roff,
+                   int rlen)

已过时。

指定者:: compare 在接口中 org.apache.hadoop.io.RawComparator<Cell>

+ + + +

+
compareRowKey
+
```
protected int compareRowKey(Cell left,
+                            Cell right)
```
+
已过时。
+
Compares the only the user specified portion of a Key. This is overridden by MetaComparator.
+
+
参数:
+
left -
+
right -
+
返回:
+
0 if equal, <0 if left smaller, >0 if right smaller
+
+

+ + + +

+
compareFlatKey
+
```
public int compareFlatKey(byte[] left,
+                          int loffset,
+                          int llength,
+                          byte[] right,
+                          int roffset,
+                          int rlength)
```
+
已过时。
+
Compares left to right assuming that left,loffset,llength and right,roffset,rlength are + full KVs laid out in a flat byte[]s.
+
+
参数:
+
left -
+
loffset -
+
llength -
+
right -
+
roffset -
+
rlength -
+
返回:
+
0 if equal, <0 if left smaller, >0 if right smaller
+
+

+ + + +

compareFlatKey

public int compareFlatKey(byte[] left,
+                          byte[] right)

已过时。

+ + + +

compareKey

public int compareKey(Cell cell,
+                      byte[] row,
+                      int roff,
+                      int rlen,
+                      byte[] fam,
+                      int foff,
+                      int flen,
+                      byte[] col,
+                      int coff,
+                      int clen,
+                      long ts,
+                      byte type)

已过时。

+ + + +

compareOnlyKeyPortion

public int compareOnlyKeyPortion(Cell left,
+                                 Cell right)

已过时。

+ + + +

+
compare
+
```
public int compare(Cell left,
+                   Cell right)
```
+
已过时。
+
Compares the Key of a cell -- with fields being more significant in this order: + rowkey, colfam/qual, timestamp, type, mvcc
+
+
指定者:
+
compare 在接口中 Comparator<Cell>
+
+

+ + + +

compareTimestamps

public int compareTimestamps(Cell left,
+                             Cell right)

已过时。

+ + + +

compareRows

public int compareRows(Cell left,
+                       Cell right)

已过时。

参数:: left -; right -
返回:: Result comparing rows.

+ + + +

compareRows

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

已过时。

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

参数:: left -; loffset -; llength -; right -; roffset -; rlength -
返回:: 0 if equal, <0 if left smaller, >0 if right smaller

+ + + +

compareColumns

protected int compareColumns(byte[] left,
+                             int loffset,
+                             int llength,
+                             int lfamilylength,
+                             byte[] right,
+                             int roffset,
+                             int rlength,
+                             int rfamilylength)

已过时。

+ + + +

compareIgnoringPrefix

public int compareIgnoringPrefix(int commonPrefix,
+                                 byte[] left,
+                                 int loffset,
+                                 int llength,
+                                 byte[] right,
+                                 int roffset,
+                                 int rlength)

已过时。

Overridden

指定者:: compareIgnoringPrefix 在接口中 KeyValue.SamePrefixComparator<byte[]>
参数:: commonPrefix -; left -; loffset -; llength -; right -; roffset -; rlength -
返回:: 0 if equal, <0 if left smaller, >0 if right smaller

+ + + +

compareFamilies

protected int compareFamilies(byte[] left,
+                              int loffset,
+                              int lfamilylength,
+                              byte[] right,
+                              int roffset,
+                              int rfamilylength)

已过时。

+ + + +

compareColumns

protected int compareColumns(byte[] left,
+                             int loffset,
+                             int lquallength,
+                             byte[] right,
+                             int roffset,
+                             int rquallength)

已过时。

+ + + +

+
matchingRowColumn
+
```
public boolean matchingRowColumn(Cell left,
+                                 Cell right)
```
+
已过时。
+
Compares the row and column of two keyvalues for equality
+
+
参数:
+
left -
+
right -
+
返回:
+
True if same row and column.
+
+

+ + + +

+
matchingRows
+
```
public boolean matchingRows(Cell left,
+                            Cell right)
```
+
已过时。
+
Compares the row of two keyvalues for equality
+
+
参数:
+
left -
+
right -
+
返回:
+
True if rows match.
+
+

+ + + +

+
matchingRows
+
```
public boolean matchingRows(byte[] left,
+                            int loffset,
+                            int llength,
+                            byte[] right,
+                            int roffset,
+                            int rlength)
```
+
已过时。
+
Compare rows. Just calls Bytes.equals, but it's good to have this encapsulated.
+
+
参数:
+
left - Left row array.
+
loffset - Left row offset.
+
llength - Left row length.
+
right - Right row array.
+
roffset - Right row offset.
+
rlength - Right row length.
+
返回:
+
Whether rows are the same row.
+
+

+ + + +

calcIndexKey

public byte[] calcIndexKey(byte[] lastKeyOfPreviousBlock,
+                           byte[] firstKeyInBlock)

已过时。

+ + + +

+
getShortMidpointKey
+
```
@Deprecated
+public byte[] getShortMidpointKey(byte[] leftKey,
+                                              byte[] rightKey)
```
+
已过时。 Since 0.99.2;
+
This is a HFile block index key optimization.
+
+
参数:
+
leftKey -
+
rightKey -
+
返回:
+
0 if equal, <0 if left smaller, >0 if right smaller
+
+

+ + + +

+
clone
+
```
protected Object clone()
+                throws CloneNotSupportedException
```
+
已过时。
+
+
覆盖:
+
clone 在类中 Object
+
抛出:
+
CloneNotSupportedException
+
+

类 KeyValue.KVComparator

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 java.util.Comparator

构造器详细资料

KVComparator

方法详细资料

getLegacyKeyComparatorName

compare

compareRowKey

compareFlatKey

compareFlatKey

compareKey

compareOnlyKeyPortion

compare

compareTimestamps

compareRows

compareRows

compareColumns

compareIgnoringPrefix

compareFamilies

compareColumns

matchingRowColumn

matchingRows

matchingRows

calcIndexKey

getShortMidpointKey

clone