Package org.rumbledb.runtime.functions.maps

Class MapKeysFunctionIterator

java.lang.Object

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

org.rumbledb.runtime.plan.ItemRuntimePlan

org.rumbledb.runtime.functions.maps.MapKeysFunctionIterator

All Implemented Interfaces:

Serializable, LocalRuntimePlan<Item>

public class MapKeysFunctionIterator
extends ItemRuntimePlan
implements LocalRuntimePlan<Item>

W3C XPath/XQuery map:keys:

• requires exactly one map argument
• returns the atomic keys present in the map

This built-in is local execution only (consistent with map/array accessors).

See Also:

• Serialized Form

Field Summary

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

staticContext

Constructor Summary

Constructors

Constructor	Description
MapKeysFunctionIterator(List<ItemRuntimePlan> arguments, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
Cursor<Item>	createNativeCursor(DynamicContext context)	Creates an independent cursor for one native local evaluation.

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

MapKeysFunctionIterator

public MapKeysFunctionIterator(List<ItemRuntimePlan> arguments,
 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