org.apache.flink.api.java.operators.translation

Class TwoKeyExtractingMapper<T,K1,K2>

java.lang.Object

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

org.apache.flink.api.common.functions.RichMapFunction<T,org.apache.flink.api.java.tuple.Tuple3<K1,K2,T>>

org.apache.flink.api.java.operators.translation.TwoKeyExtractingMapper<T,K1,K2>

Type Parameters:

T - type of the values

K1 - type of the first key

K2 - type of the second key

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.MapFunction<T,org.apache.flink.api.java.tuple.Tuple3<K1,K2,T>>, org.apache.flink.api.common.functions.RichFunction

@Internal
public final class TwoKeyExtractingMapper<T,K1,K2>
extends org.apache.flink.api.common.functions.RichMapFunction<T,org.apache.flink.api.java.tuple.Tuple3<K1,K2,T>>

Mapper that extracts two keys of a value.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TwoKeyExtractingMapper(org.apache.flink.api.java.functions.KeySelector<T,K1> keySelector1, org.apache.flink.api.java.functions.KeySelector<T,K2> keySelector2)

Method Summary

Modifier and Type	Method and Description
org.apache.flink.api.java.tuple.Tuple3<K1,K2,T>	map(T value)

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

TwoKeyExtractingMapper

public TwoKeyExtractingMapper(org.apache.flink.api.java.functions.KeySelector<T,K1> keySelector1,
                              org.apache.flink.api.java.functions.KeySelector<T,K2> keySelector2)

Method Detail

map

public org.apache.flink.api.java.tuple.Tuple3<K1,K2,T> map(T value)
                                                    throws Exception

Specified by:

map in interface org.apache.flink.api.common.functions.MapFunction<T,org.apache.flink.api.java.tuple.Tuple3<K1,K2,T>>

Specified by:

map in class org.apache.flink.api.common.functions.RichMapFunction<T,org.apache.flink.api.java.tuple.Tuple3<K1,K2,T>>

Throws:

Exception