io.druid.query.extraction

Class LookupExtractionFn

java.lang.Object

io.druid.query.extraction.DimExtractionFn

io.druid.query.extraction.FunctionalExtraction

io.druid.query.extraction.LookupExtractionFn

All Implemented Interfaces:

ExtractionFn

public class LookupExtractionFn
extends FunctionalExtraction

Nested Class Summary

Nested classes/interfaces inherited from interface io.druid.query.extraction.ExtractionFn

ExtractionFn.ExtractionType

Constructor Summary

Constructors

Constructor and Description
LookupExtractionFn(LookupExtractor lookup, boolean retainMissingValue, String replaceMissingValueWith, boolean injective)

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getCacheKey() Returns a byte[] unique to all concrete implementations of DimExtractionFn.
LookupExtractor	getLookup()
String	getReplaceMissingValueWith()
boolean	isInjective()
boolean	isRetainMissingValue()

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

apply, getExtractionType, preservesOrdering

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

apply, apply

Methods inherited from class java.lang.Object

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

Constructor Detail

LookupExtractionFn

public LookupExtractionFn(LookupExtractor lookup,
                  boolean retainMissingValue,
                  @Nullable
                  String replaceMissingValueWith,
                  boolean injective)

Method Detail

getLookup

public LookupExtractor getLookup()

isRetainMissingValue

public boolean isRetainMissingValue()

Overrides:

isRetainMissingValue in class FunctionalExtraction

getReplaceMissingValueWith

public String getReplaceMissingValueWith()

Overrides:

getReplaceMissingValueWith in class FunctionalExtraction

isInjective

public boolean isInjective()

Overrides:

isInjective in class FunctionalExtraction

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