Package org.rumbledb.runtime.primary

Class MapConstructorRuntimeIterator

java.lang.Object

org.rumbledb.runtime.RuntimeIterator

org.rumbledb.runtime.AtMostOneItemLocalRuntimeIterator

org.rumbledb.runtime.primary.MapConstructorRuntimeIterator

All Implemented Interfaces:

com.esotericsoftware.kryo.KryoSerializable, Serializable, RuntimeIteratorInterface

public class MapConstructorRuntimeIterator
extends AtMostOneItemLocalRuntimeIterator

XQuery 3.1 map constructor: atomized single-atomic keys and general- sequence values.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.rumbledb.runtime.RuntimeIterator

children, currentDynamicContextForLocalExecution, FLOW_EXCEPTION_MESSAGE, hasNext, isOpen, isSequential, isUpdating, staticContext, staticURI

Constructor Summary

Constructors

Constructor	Description
MapConstructorRuntimeIterator(List<RuntimeIterator> keys, List<RuntimeIterator> values, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
NativeClauseContext	generateNativeQuery(NativeClauseContext nativeClauseContext)	This function generate (if possible) a native spark-sql query that maps the inner working of the iterator
Item	materializeFirstItemOrNull(DynamicContext dynamicContext)

Methods inherited from class org.rumbledb.runtime.AtMostOneItemLocalRuntimeIterator

close, getEffectiveBooleanValueOrCheckPosition, getRDD, materialize, materializeAtMostOneItemOrNull, materializeExactlyOneItem, materializeNFirstItems, next, open, reset

Methods inherited from class org.rumbledb.runtime.RuntimeIterator

bindToVariableInDynamicContext, canProduceDataFrame, deepCopy, getConfiguration, getDataFrame, getEffectiveBooleanValue, getHighestExecutionMode, getMetadata, getOrCreateDataFrame, getPendingUpdateList, getRuntimeStaticContext, getStaticType, getVariableDependencies, hasNext, isDataFrame, isLocal, isOpen, isRDD, isRDDOrDataFrame, isSequential, isSparkJobNeeded, isUpdating, materialize, materializeAtMostOneItemOrDefault, print, printToStandardError, read, setStaticContext, write

Methods inherited from class java.lang.Object

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

Constructor Details

MapConstructorRuntimeIterator

public MapConstructorRuntimeIterator(List<RuntimeIterator> keys,
 List<RuntimeIterator> values,
 RuntimeStaticContext staticContext)

Method Details

materializeFirstItemOrNull

public Item materializeFirstItemOrNull(DynamicContext dynamicContext)

Specified by:

materializeFirstItemOrNull in class AtMostOneItemLocalRuntimeIterator

generateNativeQuery

public NativeClauseContext generateNativeQuery(NativeClauseContext nativeClauseContext)

Description copied from class: RuntimeIterator

This function generate (if possible) a native spark-sql query that maps the inner working of the iterator

Overrides:

generateNativeQuery in class RuntimeIterator

Parameters:

nativeClauseContext - context information to generate the native query

Returns:

a native clause context with the spark-sql native query to get an equivalent result of the iterator, or [NativeClauseContext.NoNativeQuery] if it is not possible