com.helger.commons.aggregate

Class AggregatorConstant<SRCTYPE,DSTTYPE>

java.lang.Object

com.helger.commons.aggregate.AbstractAggregator<SRCTYPE,DSTTYPE>

com.helger.commons.aggregate.AggregatorConstant<SRCTYPE,DSTTYPE>

Type Parameters:

SRCTYPE - Source type

DSTTYPE - Destination type

All Implemented Interfaces:

IAggregator<SRCTYPE,DSTTYPE>

@Immutable
public final class AggregatorConstant<SRCTYPE,DSTTYPE>
extends AbstractAggregator<SRCTYPE,DSTTYPE>

Always returns null.

Author:

Philip Helger

Constructor Summary

Constructors

Constructor and Description
AggregatorConstant(DSTTYPE aValue)

Method Summary

Modifier and Type	Method and Description
DSTTYPE	aggregate(Collection<SRCTYPE> aResults) Aggregate a collection of input objects to a single output object.
boolean	equals(Object o)
DSTTYPE	getConstantValue()
int	hashCode()
String	toString()

Methods inherited from class com.helger.commons.aggregate.AbstractAggregator

aggregate

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregatorConstant

public AggregatorConstant(@Nullable
                          DSTTYPE aValue)

Method Detail

getConstantValue

@Nullable
public DSTTYPE getConstantValue()

aggregate

@Nullable
public DSTTYPE aggregate(@Nullable
                                    Collection<SRCTYPE> aResults)

Description copied from interface: IAggregator

Aggregate a collection of input objects to a single output object.

Parameters:

aResults - Source objects. May not be null.

Returns:

The aggregated object. May be null.

equals

public boolean equals(Object o)

Overrides:

equals in class AbstractAggregator<SRCTYPE,DSTTYPE>

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractAggregator<SRCTYPE,DSTTYPE>

toString

public String toString()

Overrides:

toString in class AbstractAggregator<SRCTYPE,DSTTYPE>