com.almworks.jira.structure.api.attribute.loader.reduce

Class ReductionStrategy.StrictReductionStrategy<T>

Object

ReductionStrategy.AbstractReductionStrategy<T>

ReductionStrategy.StrictReductionStrategy<T>

All Implemented Interfaces:

ReductionStrategy<T>

Enclosing interface:

ReductionStrategy<T>

public static class ReductionStrategy.StrictReductionStrategy<T>
extends ReductionStrategy.AbstractReductionStrategy<T>

Main value: the aggregation based on the whole subtree without self row.

Additional data: value that does include self.

Calculation idea: sum the additional values from all children.

Nested Class Summary

Nested classes/interfaces inherited from interface ReductionStrategy

ReductionStrategy.AbstractReductionStrategy<T>, ReductionStrategy.ChildrenReductionStrategy<T>, ReductionStrategy.LeavesReductionStrategy<T>, ReductionStrategy.StrictReductionStrategy<T>, ReductionStrategy.SubtreeReductionStrategy<T>

Constructor Summary

Constructors

Constructor and Description
StrictReductionStrategy()

Method Summary

Modifier and Type	Method and Description
AttributeValue<T>	apply(Supplier<AttributeValue<T>> selfSupplier, List<AttributeValue<T>> children, ValueReducer<T> reducer) Reduce value of the current node and children values to the single value using the specified ValueReducer.

Methods inherited from class Object

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

Methods inherited from interface ReductionStrategy

forAttributeSpec, forStrategyType, getStrategyType

Constructor Detail

StrictReductionStrategy

public StrictReductionStrategy()

Method Detail

apply

@NotNull
public AttributeValue<T> apply(@NotNull
                                        Supplier<AttributeValue<T>> selfSupplier,
                                        @NotNull
                                        List<AttributeValue<T>> children,
                                        @NotNull
                                        ValueReducer<T> reducer)

Description copied from interface: ReductionStrategy

Reduce value of the current node and children values to the single value using the specified ValueReducer. This method is designed to be used from AttributeLoader.Aggregate. Reduction can be performed over any subtree and it's assumed that every ReductionStrategy describes in this method a reduction for a single known subtree type.

Parameters:

selfSupplier - supplier for value of current row. Supplier can be or be not called from this method depending on type of subtree this strategy describes. It's assumed that calling supplier can be heavy operation so it shouldn't be called more than once for each row from this method.

children - values of direct children rows supplied by AttributeLoader.Aggregate.loadValue

reducer - instance that is responsible for reducing but can ignore actual form of handled subtree

Returns:

reduced subtree value