org.apache.hadoop.hbase.filter

类 CompareFilter

java.lang.Object

org.apache.hadoop.hbase.filter.Filter

org.apache.hadoop.hbase.filter.FilterBase

org.apache.hadoop.hbase.filter.CompareFilter

直接已知子类:

DependentColumnFilter, FamilyFilter, QualifierFilter, RowFilter, ValueFilter

@InterfaceAudience.Public
@InterfaceStability.Stable
public abstract class CompareFilter
extends FilterBase

This is a generic filter to be used to filter by comparison. It takes an operator (equal, greater, not equal, etc) and a byte [] comparator.

To filter by row key, use RowFilter.

To filter by column qualifier, use QualifierFilter.

To filter by value, use SingleColumnValueFilter.

These filters can be wrapped with SkipFilter and WhileMatchFilter to add more control.

Multiple filters can be combined using FilterList.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	CompareFilter.CompareOp Comparison operators.

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

Filter.ReturnCode

字段概要

字段

限定符和类型	字段和说明
protected ByteArrayComparable	comparator
protected CompareFilter.CompareOp	compareOp

从类继承的字段 org.apache.hadoop.hbase.filter.Filter

reversed

构造器概要

构造器

构造器和说明
CompareFilter(CompareFilter.CompareOp compareOp, ByteArrayComparable comparator) Constructor.

方法概要

方法

限定符和类型	方法和说明
protected boolean	doCompare(CompareFilter.CompareOp compareOp, ByteArrayComparable comparator, byte[] data, int offset, int length)
boolean	equals(Object obj)
static ArrayList<Object>	extractArguments(ArrayList<byte[]> filterArguments)
ByteArrayComparable	getComparator()
CompareFilter.CompareOp	getOperator()
int	hashCode()
String	toString() Return filter's info for debugging and logging purpose.
Cell	transformCell(Cell v) By default no transformation takes place Give the filter a chance to transform the passed KeyValue.

从类继承的方法 org.apache.hadoop.hbase.filter.FilterBase

createFilterFromArguments, filterAllRemaining, filterRow, filterRowCells, filterRowKey, getNextCellHint, getNextKeyHint, hasFilterRow, isFamilyEssential, reset, toByteArray, transform

从类继承的方法 org.apache.hadoop.hbase.filter.Filter

filterKeyValue, isReversed, parseFrom, setReversed

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

字段详细资料

compareOp

protected CompareFilter.CompareOp compareOp

comparator

protected ByteArrayComparable comparator

构造器详细资料

CompareFilter

public CompareFilter(CompareFilter.CompareOp compareOp,
             ByteArrayComparable comparator)

Constructor.

参数:

compareOp - the compare op for row matching

comparator - the comparator for row matching

方法详细资料

getOperator

public CompareFilter.CompareOp getOperator()

返回:

operator

getComparator

public ByteArrayComparable getComparator()

返回:

the comparator

doCompare

protected boolean doCompare(CompareFilter.CompareOp compareOp,
                ByteArrayComparable comparator,
                byte[] data,
                int offset,
                int length)

transformCell

public Cell transformCell(Cell v)

从类复制的说明: FilterBase

By default no transformation takes place Give the filter a chance to transform the passed KeyValue. If the Cell is changed a new Cell object must be returned.

覆盖:

transformCell 在类中 FilterBase

参数:

v - the KeyValue in question

返回:

the changed KeyValue

另请参阅:

The transformed KeyValue is what is eventually returned to the client. Most filters will return the passed KeyValue unchanged., for an example of a transformation. Concrete implementers can signal a failure condition in their code by throwing an {@link IOException}.

extractArguments

public static ArrayList<Object> extractArguments(ArrayList<byte[]> filterArguments)

toString

public String toString()

从类复制的说明: FilterBase

Return filter's info for debugging and logging purpose.

覆盖:

toString 在类中 FilterBase

equals

public boolean equals(Object obj)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object