Package org.rumbledb.runtime.misc

Class NodeComparisonRuntimeIterator

java.lang.Object

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

org.rumbledb.runtime.plan.ItemRuntimePlan

org.rumbledb.runtime.AbstractAtMostOneItemRuntimePlan

org.rumbledb.runtime.misc.NodeComparisonRuntimeIterator

All Implemented Interfaces:

Serializable, AtMostOneLocalRuntimePlan<Item>, LocalRuntimePlan<Item>

public class NodeComparisonRuntimeIterator
extends AbstractAtMostOneItemRuntimePlan

Runtime iterator for node comparisons. Node comparisons are used to compare two nodes, by their identity or by their document order.

See Also:

• NodeComparisonExpression
• Serialized Form

Field Summary

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

staticContext

Constructor Summary

Constructors

Constructor	Description
NodeComparisonRuntimeIterator(ItemRuntimePlan leftIterator, ItemRuntimePlan rightIterator, NodeComparisonExpression.NodeComparisonOperator operator, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
Item	evaluateAtMostOne(DynamicContext dynamicContext)	Evaluates the plan without allocating a cursor.
ItemRuntimePlan	getLeftIterator()
NodeComparisonExpression.NodeComparisonOperator	getOperator()
ItemRuntimePlan	getRightIterator()

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

NodeComparisonRuntimeIterator

public NodeComparisonRuntimeIterator(ItemRuntimePlan leftIterator,
 ItemRuntimePlan rightIterator,
 NodeComparisonExpression.NodeComparisonOperator operator,
 RuntimeStaticContext staticContext)

Method Details

getOperator

public NodeComparisonExpression.NodeComparisonOperator getOperator()

getLeftIterator

public ItemRuntimePlan getLeftIterator()

getRightIterator

public ItemRuntimePlan getRightIterator()

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