Package org.rumbledb.runtime.navigation

Class PredicateIterator

java.lang.Object

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

org.rumbledb.runtime.plan.ItemRuntimePlan

org.rumbledb.runtime.navigation.PredicateIterator

All Implemented Interfaces:

Serializable, DataFrameRuntimePlan<Item>, LocalRuntimePlan<Item>, NativeQueryRuntimePlan, RDDRuntimePlan<Item>

public class PredicateIterator
extends ItemRuntimePlan
implements LocalRuntimePlan<Item>, RDDRuntimePlan<Item>, DataFrameRuntimePlan<Item>, NativeQueryRuntimePlan

See Also:

• Serialized Form

Field Summary

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

staticContext

Constructor Summary

Constructors

Constructor	Description
PredicateIterator(ItemRuntimePlan sequence, ItemRuntimePlan filterExpression, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
Cursor<Item>	createNativeCursor(DynamicContext context)	Creates an independent cursor for one native local evaluation.
HomogeneousItemDataFrame	createNativeDataFrame(DynamicContext context)	Builds the DataFrame for one evaluation.
org.apache.spark.api.java.JavaRDD<Item>	createNativeRDD(DynamicContext dynamicContext)	Builds the RDD for one evaluation.
NativeClauseContext	generateNativeQuery(NativeClauseContext nativeClauseContext)
Map<Name,DynamicContext.VariableDependency>	getVariableDependencies()
ItemRuntimePlan	predicateIterator()
ItemRuntimePlan	sequenceIterator()

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

getChild, getChildren, getStaticType, 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

PredicateIterator

public PredicateIterator(ItemRuntimePlan sequence,
 ItemRuntimePlan filterExpression,
 RuntimeStaticContext staticContext)

Method Details

createNativeCursor

public Cursor<Item> createNativeCursor(DynamicContext context)

Description copied from interface: LocalRuntimePlan

Creates an independent cursor for one native local evaluation.

Specified by:

createNativeCursor in interface LocalRuntimePlan<Item>

Parameters:

context - the dynamic context for that evaluation

Returns:

an unopened cursor

sequenceIterator

public ItemRuntimePlan sequenceIterator()

predicateIterator

public ItemRuntimePlan predicateIterator()

createNativeRDD

public org.apache.spark.api.java.JavaRDD<Item> createNativeRDD(DynamicContext dynamicContext)

Description copied from interface: RDDRuntimePlan

Builds the RDD for one evaluation.

Specified by:

createNativeRDD in interface RDDRuntimePlan<Item>

Parameters:

dynamicContext - the dynamic context for that evaluation

Returns:

the resulting RDD

createNativeDataFrame

public HomogeneousItemDataFrame createNativeDataFrame(DynamicContext context)

Description copied from interface: DataFrameRuntimePlan

Builds the DataFrame for one evaluation.

Specified by:

createNativeDataFrame in interface DataFrameRuntimePlan<Item>

Parameters:

context - the dynamic context for that evaluation

Returns:

the resulting DataFrame

getVariableDependencies

public Map<Name,DynamicContext.VariableDependency> getVariableDependencies()

Overrides:

getVariableDependencies in class ItemRuntimePlan

generateNativeQuery

public NativeClauseContext generateNativeQuery(NativeClauseContext nativeClauseContext)

Specified by:

generateNativeQuery in interface NativeQueryRuntimePlan