Package com.google.cloud.datastore.aggregation

Class Aggregation

java.lang.Object

com.google.cloud.datastore.aggregation.Aggregation

Direct Known Subclasses:

AvgAggregation, CountAggregation, SumAggregation

public abstract class Aggregation
extends Object

Represents a Google Cloud Datastore Aggregation which is used with an AggregationQuery.

Constructor Summary

Constructors

Constructor	Description
Aggregation(String alias)

Method Summary

Modifier and Type	Method	Description
protected AggregationQuery.Aggregation.Builder	aggregationBuilder()
static AvgAggregation.Builder	avg(String propertyReference)	Returns a AvgAggregation builder.
static CountAggregation.Builder	count()	Returns a CountAggregation builder.
String	getAlias()	Returns the alias for this aggregation.
static SumAggregation.Builder	sum(String propertyReference)	Returns a SumAggregation builder.
abstract AggregationQuery.Aggregation	toPb()

Methods inherited from class java.lang.Object

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

Constructor Details

Aggregation

public Aggregation(String alias)

Method Details

getAlias

public String getAlias()

Returns the alias for this aggregation.

toPb

@InternalApi
public abstract AggregationQuery.Aggregation toPb()

aggregationBuilder

@InternalApi
protected AggregationQuery.Aggregation.Builder aggregationBuilder()

count

public static CountAggregation.Builder count()

Returns a CountAggregation builder.

sum

public static SumAggregation.Builder sum(String propertyReference)

Returns a SumAggregation builder.

avg

public static AvgAggregation.Builder avg(String propertyReference)

Returns a AvgAggregation builder.