org.apache.spark.api.r

Class BaseRRDD<T,U>

java.lang.Object

org.apache.spark.rdd.RDD<U>

org.apache.spark.api.r.BaseRRDD<T,U>

All Implemented Interfaces:

java.io.Serializable, Logging

Direct Known Subclasses:

PairwiseRRDD, RRDD, StringRRDD

public abstract class BaseRRDD<T,U>
extends RDD<U>
implements Logging

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BaseRRDD(RDD<T> parent, int numPartitions, byte[] func, java.lang.String deserializer, java.lang.String serializer, byte[] packageNames, Broadcast<java.lang.Object>[] broadcastVars, scala.reflect.ClassTag<T> evidence$1, scala.reflect.ClassTag<U> evidence$2)

Method Summary

Methods

Modifier and Type	Method and Description
scala.collection.Iterator<U>	compute(Partition partition, TaskContext context) :: DeveloperApi :: Implemented by subclasses to compute a given partition.
protected java.io.DataInputStream	dataStream()
Partition[]	getPartitions() Implemented by subclasses to return the set of partitions in this RDD.
protected U	read()
protected abstract U	readData(int length)

Methods inherited from class org.apache.spark.rdd.RDD

aggregate, cache, cartesian, checkpoint, checkpointData, clearDependencies, coalesce, collect, collect, context, count, countApprox, countApproxDistinct, countApproxDistinct, countByValue, countByValueApprox, creationSite, dependencies, distinct, distinct, doubleRDDToDoubleRDDFunctions, filter, filterWith, first, firstParent, flatMap, flatMapWith, fold, foreach, foreachPartition, foreachWith, getCheckpointFile, getDependencies, getPreferredLocations, getStorageLevel, glom, groupBy, groupBy, groupBy, id, intersection, intersection, intersection, isCheckpointed, isEmpty, iterator, keyBy, localCheckpoint, map, mapPartitions, mapPartitionsWithContext, mapPartitionsWithIndex, mapPartitionsWithSplit, mapWith, max, min, name, numericRDDToDoubleRDDFunctions, parent, partitioner, partitions, persist, persist, pipe, pipe, pipe, preferredLocations, randomSplit, rddToAsyncRDDActions, rddToOrderedRDDFunctions, rddToPairRDDFunctions, rddToSequenceFileRDDFunctions, reduce, repartition, sample, saveAsObjectFile, saveAsTextFile, saveAsTextFile, scope, setName, sortBy, sparkContext, subtract, subtract, subtract, take, takeOrdered, takeSample, toArray, toDebugString, toJavaRDD, toLocalIterator, top, toString, treeAggregate, treeReduce, union, unpersist, zip, zipPartitions, zipPartitions, zipPartitions, zipPartitions, zipPartitions, zipPartitions, zipWithIndex, zipWithUniqueId

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.spark.Logging

initializeIfNecessary, initializeLogging, isTraceEnabled, log_, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning

Constructor Detail

BaseRRDD

public BaseRRDD(RDD<T> parent,
        int numPartitions,
        byte[] func,
        java.lang.String deserializer,
        java.lang.String serializer,
        byte[] packageNames,
        Broadcast<java.lang.Object>[] broadcastVars,
        scala.reflect.ClassTag<T> evidence$1,
        scala.reflect.ClassTag<U> evidence$2)

Method Detail

dataStream

protected java.io.DataInputStream dataStream()

getPartitions

public Partition[] getPartitions()

Description copied from class: RDD

Implemented by subclasses to return the set of partitions in this RDD. This method will only be called once, so it is safe to implement a time-consuming computation in it.

Specified by:

getPartitions in class RDD<U>

Returns:

(undocumented)

compute

public scala.collection.Iterator<U> compute(Partition partition,
                                   TaskContext context)

Description copied from class: RDD

:: DeveloperApi :: Implemented by subclasses to compute a given partition.

Specified by:

compute in class RDD<U>

Parameters:

partition - (undocumented)

context - (undocumented)

Returns:

(undocumented)

readData

protected abstract U readData(int length)

read

protected U read()