Package org.rumbledb.runtime.functions.random

Class RandomNumberGeneratorNextBodyIterator

java.lang.Object

org.rumbledb.runtime.plan.RuntimePlan<Item>

org.rumbledb.runtime.plan.ItemRuntimePlan

org.rumbledb.runtime.AbstractAtMostOneItemRuntimePlan

org.rumbledb.runtime.functions.random.RandomNumberGeneratorNextBodyIterator

All Implemented Interfaces:

Serializable, AtMostOneLocalRuntimePlan<Item>, LocalRuntimePlan<Item>

public class RandomNumberGeneratorNextBodyIterator
extends AbstractAtMostOneItemRuntimePlan

Body of the "next" entry of a random-number-generator map: deterministically derives the next seed in the chain and builds a fresh three-entry map from it.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.rumbledb.runtime.plan.RuntimePlan

staticContext

Constructor Summary

Constructors

Constructor	Description
RandomNumberGeneratorNextBodyIterator(long seed, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
Item	evaluateAtMostOne(DynamicContext context)	Evaluates the plan without allocating a cursor.

Methods inherited from class org.rumbledb.runtime.AbstractAtMostOneItemRuntimePlan

createNativeCursor

Methods inherited from class org.rumbledb.runtime.plan.ItemRuntimePlan

getChild, getChildren, getStaticType, getVariableDependencies, isSparkJobNeeded, print

Methods inherited from class org.rumbledb.runtime.plan.RuntimePlan

getConfiguration, getCursor, getDataFrame, getMetadata, getRDD, getRuntimeStaticContext, materialize, materializeAtMost, materializeAtMostOne, materializeExactlyOne, materializeFirstOrNull

Methods inherited from class java.lang.Object

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

Constructor Details

RandomNumberGeneratorNextBodyIterator

public RandomNumberGeneratorNextBodyIterator(long seed,
 RuntimeStaticContext staticContext)

Method Details

evaluateAtMostOne

public Item evaluateAtMostOne(DynamicContext context)

Description copied from interface: AtMostOneLocalRuntimePlan

Evaluates the plan without allocating a cursor.

Specified by:

evaluateAtMostOne in interface AtMostOneLocalRuntimePlan<Item>

Specified by:

evaluateAtMostOne in class AbstractAtMostOneItemRuntimePlan

Parameters:

context - the dynamic context for the evaluation

Returns:

the value, or null for the empty sequence