cascading.flow.hadoop

Class HadoopGroupByClosure

java.lang.Object

cascading.pipe.joiner.JoinerClosure

cascading.flow.hadoop.HadoopGroupByClosure

Direct Known Subclasses:

HadoopCoGroupClosure

public class HadoopGroupByClosure
extends cascading.pipe.joiner.JoinerClosure

Class GroupClosure is used internally to represent groups of tuples during grouping.

Field Summary

Fields

Modifier and Type	Field and Description
protected cascading.tuple.Tuple	grouping
protected java.util.Iterator[]	values

Fields inherited from class cascading.pipe.joiner.JoinerClosure

flowProcess, joinFields, valueFields

Constructor Summary

Constructors

Constructor and Description
HadoopGroupByClosure(cascading.flow.FlowProcess flowProcess, cascading.tuple.Fields[] groupingFields, cascading.tuple.Fields[] valueFields)

Method Summary

Modifier and Type	Method and Description
cascading.tuple.Tuple	getGrouping()
cascading.tuple.Tuple	getGroupTuple(cascading.tuple.Tuple keysTuple)
java.util.Iterator<cascading.tuple.Tuple>	getIterator(int pos)
protected java.util.Iterator	getValueIterator(int pos)
boolean	isEmpty(int pos)
protected java.util.Iterator<cascading.tuple.Tuple>	makeIterator(int pos, java.util.Iterator values)
void	reset(cascading.tuple.Tuple grouping, java.util.Iterator<cascading.tuple.Tuple>[] values)
int	size()

Methods inherited from class cascading.pipe.joiner.JoinerClosure

getFlowProcess, getJoinFields, getValueFields, isSelfJoin

Methods inherited from class java.lang.Object

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

Field Detail

grouping

protected cascading.tuple.Tuple grouping

values

protected java.util.Iterator[] values

Constructor Detail

HadoopGroupByClosure

public HadoopGroupByClosure(cascading.flow.FlowProcess flowProcess,
                            cascading.tuple.Fields[] groupingFields,
                            cascading.tuple.Fields[] valueFields)

Method Detail

getGrouping

public cascading.tuple.Tuple getGrouping()

size

public int size()

Specified by:

size in class cascading.pipe.joiner.JoinerClosure

getValueIterator

protected java.util.Iterator getValueIterator(int pos)

getIterator

public java.util.Iterator<cascading.tuple.Tuple> getIterator(int pos)

Specified by:

getIterator in class cascading.pipe.joiner.JoinerClosure

isEmpty

public boolean isEmpty(int pos)

Specified by:

isEmpty in class cascading.pipe.joiner.JoinerClosure

makeIterator

protected java.util.Iterator<cascading.tuple.Tuple> makeIterator(int pos,
                                                                 java.util.Iterator values)

reset

public void reset(cascading.tuple.Tuple grouping,
                  java.util.Iterator<cascading.tuple.Tuple>[] values)

getGroupTuple

public cascading.tuple.Tuple getGroupTuple(cascading.tuple.Tuple keysTuple)

Specified by:

getGroupTuple in class cascading.pipe.joiner.JoinerClosure