io.druid.query.aggregation.post

Class ConstantPostAggregator

java.lang.Object

io.druid.query.aggregation.post.ConstantPostAggregator

All Implemented Interfaces:

io.druid.java.util.common.Cacheable, PostAggregator

public class ConstantPostAggregator
extends Object
implements PostAggregator

Constructor Summary

Constructors

Constructor and Description
ConstantPostAggregator(String name, Number constantValue)

Method Summary

Modifier and Type	Method and Description
Object	compute(Map<String,Object> combinedAggregators)
ConstantPostAggregator	decorate(Map<String,AggregatorFactory> aggregators) Returns a richer post aggregator which are built from the given aggregators with their names and some accessible environmental variables such as ones in the object scope.
boolean	equals(Object o)
byte[]	getCacheKey()
Comparator	getComparator()
Number	getConstantValue()
Set<String>	getDependentFields()
String	getName()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantPostAggregator

public ConstantPostAggregator(String name,
                              Number constantValue)

Method Detail

getDependentFields

public Set<String> getDependentFields()

Specified by:

getDependentFields in interface PostAggregator

getComparator

public Comparator getComparator()

Specified by:

getComparator in interface PostAggregator

compute

public Object compute(Map<String,Object> combinedAggregators)

Specified by:

compute in interface PostAggregator

getName

public String getName()

Specified by:

getName in interface PostAggregator

decorate

public ConstantPostAggregator decorate(Map<String,AggregatorFactory> aggregators)

Description copied from interface: PostAggregator

Returns a richer post aggregator which are built from the given aggregators with their names and some accessible environmental variables such as ones in the object scope.

Specified by:

decorate in interface PostAggregator

Parameters:

aggregators - A map of aggregator factories with their names.

getConstantValue

public Number getConstantValue()

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

getCacheKey

public byte[] getCacheKey()

Specified by:

getCacheKey in interface io.druid.java.util.common.Cacheable