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

Class ValueSummaryAggregator.StringValueSummaryAggregator

java.lang.Object

org.apache.flink.api.java.summarize.aggregation.ValueSummaryAggregator<org.apache.flink.types.StringValue,String,StringColumnSummary,StringSummaryAggregator>

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

All Implemented Interfaces:

Serializable, Aggregator<org.apache.flink.types.StringValue,StringColumnSummary>

Enclosing class:

ValueSummaryAggregator<VT extends org.apache.flink.types.Value,PT,R,A extends Aggregator<PT,R>>

public static class ValueSummaryAggregator.StringValueSummaryAggregator
extends ValueSummaryAggregator<org.apache.flink.types.StringValue,String,StringColumnSummary,StringSummaryAggregator>

A ValueSummaryAggregator for String.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.api.java.summarize.aggregation.ValueSummaryAggregator

ValueSummaryAggregator.BooleanValueSummaryAggregator, ValueSummaryAggregator.DoubleValueSummaryAggregator, ValueSummaryAggregator.FloatValueSummaryAggregator, ValueSummaryAggregator.IntegerValueSummaryAggregator, ValueSummaryAggregator.LongValueSummaryAggregator, ValueSummaryAggregator.ShortValueSummaryAggregator, ValueSummaryAggregator.StringValueSummaryAggregator

Constructor Summary

Constructors

Constructor	Description
StringValueSummaryAggregator()

Method Summary

Modifier and Type	Method	Description
protected String	getValue(org.apache.flink.types.StringValue value)	Get the value out of a value type.
protected StringSummaryAggregator	initPrimitiveAggregator()	Initialize an aggregator that can be used for the underlying primitive in the Value type.

Methods inherited from class org.apache.flink.api.java.summarize.aggregation.ValueSummaryAggregator

aggregate, combine, result

Methods inherited from class java.lang.Object

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

Constructor Detail

StringValueSummaryAggregator

public StringValueSummaryAggregator()

Method Detail

initPrimitiveAggregator

protected StringSummaryAggregator initPrimitiveAggregator()

Description copied from class: ValueSummaryAggregator

Initialize an aggregator that can be used for the underlying primitive in the Value type.

E.g. DoubleValues can easily be converted to Double and could use an underlying Aggregator<Double,?>

Specified by:

initPrimitiveAggregator in class ValueSummaryAggregator<org.apache.flink.types.StringValue,String,StringColumnSummary,StringSummaryAggregator>

getValue

protected String getValue(org.apache.flink.types.StringValue value)

Description copied from class: ValueSummaryAggregator

Get the value out of a value type.

Specified by:

getValue in class ValueSummaryAggregator<org.apache.flink.types.StringValue,String,StringColumnSummary,StringSummaryAggregator>