org.apache.flink.runtime.operators.sort

Class SortMergeCoGroupIterator<T1,T2>

java.lang.Object

org.apache.flink.runtime.operators.sort.SortMergeCoGroupIterator<T1,T2>

All Implemented Interfaces:

CoGroupTaskIterator<T1,T2>

public class SortMergeCoGroupIterator<T1,T2>
extends Object
implements CoGroupTaskIterator<T1,T2>

Constructor Summary

Constructors

Constructor and Description
SortMergeCoGroupIterator(MutableObjectIterator<T1> input1, MutableObjectIterator<T2> input2, TypeSerializer<T1> serializer1, TypeComparator<T1> groupingComparator1, TypeSerializer<T2> serializer2, TypeComparator<T2> groupingComparator2, TypePairComparator<T1,T2> pairComparator)

Method Summary

Modifier and Type	Method and Description
void	close() General-purpose close method.
Iterable<T1>	getValues1() Returns an iterable over the left input values for the current key.
Iterable<T2>	getValues2() Returns an iterable over the left input values for the current key.
boolean	next() Moves the internal pointer to the next key (if present).
void	open() General-purpose open method.

Methods inherited from class java.lang.Object

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

Constructor Detail

SortMergeCoGroupIterator

public SortMergeCoGroupIterator(MutableObjectIterator<T1> input1,
                                MutableObjectIterator<T2> input2,
                                TypeSerializer<T1> serializer1,
                                TypeComparator<T1> groupingComparator1,
                                TypeSerializer<T2> serializer2,
                                TypeComparator<T2> groupingComparator2,
                                TypePairComparator<T1,T2> pairComparator)

Method Detail

open

public void open()

Description copied from interface: CoGroupTaskIterator

General-purpose open method.

Specified by:

open in interface CoGroupTaskIterator<T1,T2>

close

public void close()

Description copied from interface: CoGroupTaskIterator

General-purpose close method.

Specified by:

close in interface CoGroupTaskIterator<T1,T2>

getValues1

public Iterable<T1> getValues1()

Description copied from interface: CoGroupTaskIterator

Returns an iterable over the left input values for the current key.

Specified by:

getValues1 in interface CoGroupTaskIterator<T1,T2>

Returns:

an iterable over the left input values for the current key.

getValues2

public Iterable<T2> getValues2()

Description copied from interface: CoGroupTaskIterator

Returns an iterable over the left input values for the current key.

Specified by:

getValues2 in interface CoGroupTaskIterator<T1,T2>

Returns:

an iterable over the left input values for the current key.

next

public boolean next()
             throws IOException

Description copied from interface: CoGroupTaskIterator

Moves the internal pointer to the next key (if present). Returns true if the operation was successful or false if no more keys are present.

The key is not necessarily shared by both inputs. In that case an empty iterator is returned by getValues1() or getValues2().

Specified by:

next in interface CoGroupTaskIterator<T1,T2>

Returns:

true on success, false if no more keys are present

Throws:

IOException