org.apache.flink.api.java.summarize.aggregation

Class StringSummaryAggregator

java.lang.Object

org.apache.flink.api.java.summarize.aggregation.StringSummaryAggregator

All Implemented Interfaces:

Serializable, Aggregator<String,StringColumnSummary>

@Internal
public class StringSummaryAggregator
extends Object
implements Aggregator<String,StringColumnSummary>

Aggregator that calculates statistics for String values.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StringSummaryAggregator()

Method Summary

Modifier and Type	Method and Description
void	aggregate(String value) Add a value to the current aggregation.
void	combine(Aggregator<String,StringColumnSummary> otherSameType) Combine two aggregations of the same type.
StringColumnSummary	result() Provide the final result of the aggregation.

Methods inherited from class java.lang.Object

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

Constructor Detail

StringSummaryAggregator

public StringSummaryAggregator()

Method Detail

aggregate

public void aggregate(String value)

Description copied from interface: Aggregator

Add a value to the current aggregation.

Specified by:

aggregate in interface Aggregator<String,StringColumnSummary>

combine

public void combine(Aggregator<String,StringColumnSummary> otherSameType)

Description copied from interface: Aggregator

Combine two aggregations of the same type.

(Implementations will need to do an unchecked cast).

Specified by:

combine in interface Aggregator<String,StringColumnSummary>

result

public StringColumnSummary result()

Description copied from interface: Aggregator

Provide the final result of the aggregation.

Specified by:

result in interface Aggregator<String,StringColumnSummary>