com.bigdata.bop.solutions

Class DropOp

java.lang.Object

com.bigdata.bop.CoreBaseBOp

com.bigdata.bop.BOpBase

com.bigdata.bop.PipelineOp

com.bigdata.bop.solutions.DropOp

All Implemented Interfaces:

BOp, IPropertySet, Serializable, Cloneable

public class DropOp
extends PipelineOp

Operator drops the identified variables from the solutions

Version:

$Id$

Author:

Bryan Thompson

See Also:

ProjectionOp, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	DropOp.Annotations

Field Summary

Fields inherited from class com.bigdata.bop.CoreBaseBOp

DEFAULT_INITIAL_CAPACITY

Fields inherited from interface com.bigdata.bop.BOp

NOANNS, NOARGS

Constructor Summary

Constructors

Constructor and Description
DropOp(BOp[] args, Map<String,Object> annotations)
DropOp(BOp[] args, NV... annotations)
DropOp(DropOp op)

Method Summary

Methods

Modifier and Type	Method and Description
FutureTask<Void>	eval(BOpContext<IBindingSet> context) Return a FutureTask which computes the operator against the evaluation context.
IVariable<?>[]	getDropVars()

Methods inherited from class com.bigdata.bop.PipelineOp

assertAtOnceJavaHeapOp, assertMaxParallelOne, getChunkCapacity, getChunkOfChunksCapacity, getChunkTimeout, getMaxMemory, getMaxParallel, isAtOnceEvaluation, isBlockedEvaluation, isLastPassRequested, isPipelinedEvaluation, isReorderSolutions, isSharedState, newStats

Methods inherited from class com.bigdata.bop.BOpBase

__replaceArg, _clearProperty, _set, _setProperty, annotations, annotationsCopy, annotationsEqual, annotationsRef, argIterator, args, argsCopy, arity, clearAnnotations, clearProperty, deepCopy, deepCopy, get, getProperty, setArg, setProperty, setUnboundProperty, toArray, toArray

Methods inherited from class com.bigdata.bop.CoreBaseBOp

annotationsEqual, annotationsToString, annotationsToString, annotationValueToString, checkArgs, clone, equals, getEvaluationContext, getId, getProperty, getRequiredProperty, hashCode, indent, isController, mutation, shortenName, toShortString, toString, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DropOp

public DropOp(DropOp op)

Parameters:

op -

DropOp

public DropOp(BOp[] args,
      Map<String,Object> annotations)

Parameters:

args -

annotations -

DropOp

public DropOp(BOp[] args,
      NV... annotations)

Method Detail

getDropVars

public IVariable<?>[] getDropVars()

See Also:

DropOp.Annotations.DROP_VARS

eval

public FutureTask<Void> eval(BOpContext<IBindingSet> context)

Description copied from class: PipelineOp

Return a FutureTask which computes the operator against the evaluation context. The caller is responsible for executing the FutureTask (this gives them the ability to hook the completion of the computation).

Specified by:

eval in class PipelineOp

Parameters:

context - The evaluation context.

Returns:

The FutureTask which will compute the operator's evaluation.