Package org.rumbledb.runtime.typing

Class InstanceOfIterator

java.lang.Object

org.rumbledb.runtime.RuntimeIterator

org.rumbledb.runtime.AtMostOneItemLocalRuntimeIterator

org.rumbledb.runtime.typing.InstanceOfIterator

All Implemented Interfaces:

com.esotericsoftware.kryo.KryoSerializable, Serializable, RuntimeIteratorInterface

public class InstanceOfIterator
extends AtMostOneItemLocalRuntimeIterator

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
InstanceOfIterator(RuntimeIterator child, SequenceType sequenceType, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
static boolean	doesItemTypeMatchItem(ItemType itemType, Item itemToMatch)	Item type tests.
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, generateNativeQuery, getConfiguration, getDataFrame, getEffectiveBooleanValue, getHighestExecutionMode, getMetadata, getOrCreateDataFrame, getPendingUpdateList, 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

InstanceOfIterator

public InstanceOfIterator(RuntimeIterator child,
 SequenceType sequenceType,
 RuntimeStaticContext staticContext)

Method Details

materializeFirstItemOrNull

public Item materializeFirstItemOrNull(DynamicContext dynamicContext)

Specified by:

materializeFirstItemOrNull in class AtMostOneItemLocalRuntimeIterator

doesItemTypeMatchItem

public static boolean doesItemTypeMatchItem(ItemType itemType,
 Item itemToMatch)

Item type tests. This supersedes the method isTypeOf() formerly located in the Item interface, as part of the efforts to cleanly separate item storage from item manipulation (which is the domain of responsibility of runtime iterators).

Parameters:

itemType - the item type to match against the item.

itemToMatch - the item to match against the type.

Returns:

true if itemToMatch matches itemType.