water.util

Class VecUtils.CollectDomain

java.lang.Object

jsr166y.ForkJoinTask<java.lang.Void>

jsr166y.CountedCompleter

water.H2O.H2OCountedCompleter<T>

water.DTask<T>

water.MRTask<VecUtils.CollectDomain>

water.util.VecUtils.CollectDomain

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.concurrent.Future<java.lang.Void>, ForkJoinPool.ManagedBlocker, Freezable<VecUtils.CollectDomain>

Enclosing class:

VecUtils

public static class VecUtils.CollectDomain
extends MRTask<VecUtils.CollectDomain>

Collect numeric domain of given Vec A map-reduce task to collect up the unique values of an integer Vec and returned as the domain for the Vec.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class water.DTask

DTask.DKeyTask<T extends DTask.DKeyTask,V extends Keyed>, DTask.RemoveCall

Field Summary

Fields inherited from class water.MRTask

_appendables, _fr, _fs, _hi, _keys, _left, _lo, _nhi, _nleft, _nlo, _nrite, _rite, _run_local, _topLocal

Fields inherited from class water.DTask

_ex

Constructor Summary

Constructors

Constructor and Description
VecUtils.CollectDomain()

Method Summary

Methods

Modifier and Type	Method and Description
void	copyOver(VecUtils.CollectDomain that)
long[]	domain() Returns exact numeric domain of given Vec computed by this task.
void	map(Chunk ys) Override with your map implementation.
VecUtils.CollectDomain	read_impl(AutoBuffer ab)
void	reduce(VecUtils.CollectDomain mrt) Override to combine results from 'mrt' into 'this' MRTask.
protected void	setupLocal() Override to do any remote initialization on the 1st remote instance of this object, for initializing node-local shared data structures.
AutoBuffer	write_impl(AutoBuffer ab)

Methods inherited from class water.MRTask

appendables, asyncExecOnAllNodes, block, closeLocal, compute2, dfork, dfork, dfork, dfork, dfork, dinvoke, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAllNodes, getResult, getResult, isReleasable, map, map, map, map, map, map, map, map, onCompletion, onExceptionalCompletion, outputFrame, outputFrame, outputFrame, postGlobal, profile, profString, self

Methods inherited from class water.DTask

getDException, hasException, logVerbose, onAck, onAckAck, setException

Methods inherited from class water.H2O.H2OCountedCompleter

asBytes, clone, compute, compute1, currThrPriority, frozenType, icer, priority, read, readJSON, reloadFromBytes, write, writeJSON

Methods inherited from class jsr166y.CountedCompleter

__tryComplete, addToPendingCount, compareAndSetPendingCount, complete, exec, getCompleter, getPendingCount, getRawResult, setCompleter, setPendingCount, setRawResult, tryComplete

Methods inherited from class jsr166y.ForkJoinTask

adapt, adapt, adapt, cancel, compareAndSetForkJoinTaskTag, completeExceptionally, fork, get, get, getException, getForkJoinTaskTag, getPool, getQueuedTaskCount, getSurplusQueuedTaskCount, helpQuiesce, inForkJoinPool, invoke, invokeAll, invokeAll, invokeAll, isCancelled, isCompletedAbnormally, isCompletedNormally, isDone, join, peekNextLocalTask, pollNextLocalTask, pollTask, quietlyComplete, quietlyInvoke, quietlyJoin, reinitialize, setForkJoinTaskTag, tryUnfork

Methods inherited from class java.lang.Object

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

Constructor Detail

VecUtils.CollectDomain

public VecUtils.CollectDomain()

Method Detail

setupLocal

protected void setupLocal()

Description copied from class: MRTask

Override to do any remote initialization on the 1st remote instance of this object, for initializing node-local shared data structures.

Overrides:

setupLocal in class MRTask<VecUtils.CollectDomain>

map

public void map(Chunk ys)

Description copied from class: MRTask

Override with your map implementation. This overload is given a single local input Chunk. It is meant for map/reduce jobs that use a single column in a input Frame. All map variants are called, but only one is expected to be overridden.

Overrides:

map in class MRTask<VecUtils.CollectDomain>

reduce

public void reduce(VecUtils.CollectDomain mrt)

Description copied from class: MRTask

Override to combine results from 'mrt' into 'this' MRTask. Both 'this' and 'mrt' are guaranteed to either have map() run on them, or be the results of a prior reduce(). Reduce is optional if, e.g., the result is some output vector.

Overrides:

reduce in class MRTask<VecUtils.CollectDomain>

write_impl

public final AutoBuffer write_impl(AutoBuffer ab)

read_impl

public final VecUtils.CollectDomain read_impl(AutoBuffer ab)

copyOver

public final void copyOver(VecUtils.CollectDomain that)

Overrides:

copyOver in class DTask<VecUtils.CollectDomain>

domain

public long[] domain()

Returns exact numeric domain of given Vec computed by this task. The domain is always sorted. Hence: domain()[0] - minimal domain value domain()[domain().length-1] - maximal domain value