org.apache.flink.api.java.functions

Class GroupReduceIterator<IN,OUT>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.api.common.functions.RichGroupReduceFunction<IN,OUT>

org.apache.flink.api.java.functions.GroupReduceIterator<IN,OUT>

Type Parameters:

IN -

OUT -

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT>, org.apache.flink.api.common.functions.RichFunction

@PublicEvolving
public abstract class GroupReduceIterator<IN,OUT>
extends org.apache.flink.api.common.functions.RichGroupReduceFunction<IN,OUT>

Base class that simplifies reducing all values provided as Iterable.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GroupReduceIterator()

Method Summary

Modifier and Type	Method and Description
void	reduce(Iterable<IN> values, org.apache.flink.util.Collector<OUT> out)
abstract Iterator<OUT>	reduceGroup(Iterable<IN> values)

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupReduceIterator

public GroupReduceIterator()

Method Detail

reduceGroup

public abstract Iterator<OUT> reduceGroup(Iterable<IN> values)
                                   throws Exception

Throws:

Exception

reduce

public final void reduce(Iterable<IN> values,
                         org.apache.flink.util.Collector<OUT> out)
                  throws Exception

Specified by:

reduce in interface org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT>

Specified by:

reduce in class org.apache.flink.api.common.functions.RichGroupReduceFunction<IN,OUT>

Throws:

Exception