Package org.rumbledb.runtime.typing

Class InstanceOfIterator

java.lang.Object

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

org.rumbledb.runtime.plan.ItemRuntimePlan

org.rumbledb.runtime.AbstractAtMostOneItemRuntimePlan

org.rumbledb.runtime.typing.InstanceOfIterator

All Implemented Interfaces:

Serializable, AtMostOneLocalRuntimePlan<Item>, LocalRuntimePlan<Item>

public class InstanceOfIterator
extends AbstractAtMostOneItemRuntimePlan

See Also:

• Serialized Form

Field Summary

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

staticContext

Constructor Summary

Constructors

Constructor	Description
InstanceOfIterator(ItemRuntimePlan child, SequenceType sequenceType, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
static boolean	doesItemTypeMatchItem(ItemType itemType, Item itemToMatch)	Item type tests.
Item	evaluateAtMostOne(DynamicContext dynamicContext)	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

InstanceOfIterator

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

Method Details

evaluateAtMostOne

public Item evaluateAtMostOne(DynamicContext dynamicContext)

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:

dynamicContext - the dynamic context for the evaluation

Returns:

the value, or null for the empty sequence

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.