io.druid.query.extraction

Class MatchingDimExtractionFn

java.lang.Object

io.druid.query.extraction.DimExtractionFn

io.druid.query.extraction.MatchingDimExtractionFn

All Implemented Interfaces:

ExtractionFn

public class MatchingDimExtractionFn
extends DimExtractionFn

Constructor Summary

Constructors

Constructor and Description
MatchingDimExtractionFn(String expr)

Method Summary

Methods

Modifier and Type	Method and Description
String	apply(String dimValue)
boolean	equals(Object o)
byte[]	getCacheKey() Returns a byte[] unique to all concrete implementations of DimExtractionFn.
String	getExpr()
int	hashCode()
boolean	preservesOrdering() Offers information on whether the extraction will preserve the original ordering of the values.
String	toString()

Methods inherited from class io.druid.query.extraction.DimExtractionFn

apply, apply

Methods inherited from class java.lang.Object

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

Constructor Detail

MatchingDimExtractionFn

public MatchingDimExtractionFn(String expr)

Method Detail

getCacheKey

public byte[] getCacheKey()

Description copied from interface: ExtractionFn

Returns a byte[] unique to all concrete implementations of DimExtractionFn. This byte[] is used to generate a cache key for the specific query.

Returns:

a byte[] unit to all concrete implements of DimExtractionFn

apply

public String apply(String dimValue)

getExpr

public String getExpr()

preservesOrdering

public boolean preservesOrdering()

Description copied from interface: ExtractionFn

Offers information on whether the extraction will preserve the original ordering of the values. Some optimizations of queries is possible if ordering is preserved. Null values *do* count towards ordering.

Returns:

true if ordering is preserved, false otherwise

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object