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org.apache.crunch.impl.dist.collect
Class EmptyPTable<K,V>

java.lang.Object
  org.apache.crunch.impl.dist.collect.PCollectionImpl<Pair<K,V>>
      org.apache.crunch.impl.dist.collect.PTableBase<K,V>
          org.apache.crunch.impl.dist.collect.EmptyPTable<K,V>

All Implemented Interfaces:

PCollection<Pair<K,V>>, PTable<K,V>

Direct Known Subclasses:

EmptyPTable

public class EmptyPTable<K,V>
extends PTableBase<K,V>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.crunch.impl.dist.collect.PCollectionImpl

PCollectionImpl.Visitor

Field Summary

Fields inherited from class org.apache.crunch.impl.dist.collect.PCollectionImpl

doOptions, materializedAt, pipeline

Constructor Summary

EmptyPTable(DistributedPipeline pipeline, PTableType<K,V> ptype)

Method Summary

protected void	acceptInternal(PCollectionImpl.Visitor visitor)
long	getLastModifiedAt()
List<PCollectionImpl<?>>	getParents()
PTableType<K,V>	getPTableType() Returns the PTableType of this PTable.
PType<Pair<K,V>>	getPType() Returns the PType of this PCollection.
protected ReadableData<Pair<K,V>>	getReadableDataInternal()
protected long	getSizeInternal()

Methods inherited from class org.apache.crunch.impl.dist.collect.PTableBase

asMap, bottom, cache, cache, cogroup, collectValues, filter, filter, getKeyType, getValueType, groupByKey, groupByKey, groupByKey, join, keys, mapKeys, mapKeys, mapValues, mapValues, materializeToMap, top, union, union, values, write, write

Methods inherited from class org.apache.crunch.impl.dist.collect.PCollectionImpl

accept, asCollection, asReadable, by, by, count, getChainingCollection, getDepth, getMaterializedAt, getName, getOnlyParent, getParallelDoOptions, getPipeline, getSize, getTargetDependencies, getTypeFamily, isBreakpoint, length, materialize, materializeAt, materializedData, max, min, parallelDo, parallelDo, parallelDo, parallelDo, parallelDo, parallelDo, setBreakpoint, toString, union, union

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.crunch.PCollection

asCollection, asReadable, by, by, count, getName, getPipeline, getSize, getTypeFamily, length, materialize, max, min, parallelDo, parallelDo, parallelDo, parallelDo, parallelDo, parallelDo, union, union

Constructor Detail

EmptyPTable

public EmptyPTable(DistributedPipeline pipeline,
                   PTableType<K,V> ptype)

Method Detail

acceptInternal

protected void acceptInternal(PCollectionImpl.Visitor visitor)

Specified by:

acceptInternal in class PCollectionImpl<Pair<K,V>>

getParents

public List<PCollectionImpl<?>> getParents()

Specified by:

getParents in class PCollectionImpl<Pair<K,V>>

getReadableDataInternal

protected ReadableData<Pair<K,V>> getReadableDataInternal()

Specified by:

getReadableDataInternal in class PCollectionImpl<Pair<K,V>>

getSizeInternal

protected long getSizeInternal()

Specified by:

getSizeInternal in class PCollectionImpl<Pair<K,V>>

getLastModifiedAt

public long getLastModifiedAt()

Specified by:

getLastModifiedAt in class PCollectionImpl<Pair<K,V>>

getPTableType

public PTableType<K,V> getPTableType()

Description copied from interface: PTable

Returns the PTableType of this PTable.

getPType

public PType<Pair<K,V>> getPType()

Description copied from interface: PCollection

Returns the PType of this PCollection.