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

Class DelegatingAggregateAttributeLoader<T>

Object

DelegatingAttributeLoader<T,L>

DelegatingRowAttributeLoader<T,AggregateAttributeLoader<T>>

DelegatingAggregateAttributeLoader<T>

All Implemented Interfaces:

AggregateAttributeLoader<T>, AttributeLoader<T>, MultiRowAttributeLoader<T>, RowAttributeLoader<T>

public class DelegatingAggregateAttributeLoader<T>
extends DelegatingRowAttributeLoader<T,AggregateAttributeLoader<T>>
implements AggregateAttributeLoader<T>

Constructor Summary

Constructors

Constructor and Description
DelegatingAggregateAttributeLoader(AggregateAttributeLoader<T> loader)

Method Summary

Modifier and Type	Method and Description
AttributeValue<T>	loadValue(List<AttributeValue<T>> childrenValues, AggregateAttributeContext context) Performs aggregate loading.

Methods inherited from class DelegatingRowAttributeLoader

isWholeForestDependent, preload

Methods inherited from class DelegatingAttributeLoader

delegate, getAttributeDependencies, getAttributeSpec, getCachingStrategy, getContextDependencies, getGlobalTrail, toString

Methods inherited from class Object

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

Methods inherited from interface MultiRowAttributeLoader

getCachingStrategy

Methods inherited from interface RowAttributeLoader

isWholeForestDependent, preload

Methods inherited from interface AttributeLoader

getAttributeDependencies, getAttributeSpec, getContextDependencies, getGlobalTrail

Constructor Detail

DelegatingAggregateAttributeLoader

public DelegatingAggregateAttributeLoader(@NotNull
                                          AggregateAttributeLoader<T> loader)

Method Detail

loadValue

@Nullable
public AttributeValue<T> loadValue(@NotNull
                                             List<AttributeValue<T>> childrenValues,
                                             @NotNull
                                             AggregateAttributeContext context)

Description copied from interface: AggregateAttributeLoader

Performs aggregate loading.

If the value is missing or empty, the loader should return AttributeValue.undefined(). If for some reason this loader is not applicable for the given row, it should return null. (Note, however, that if multiple aggregate loaders work on the same attribute, it could be tricky and lead to unexpected results.)

Note: children values may contain loop markers

Specified by:

loadValue in interface AggregateAttributeLoader<T>

Parameters:

childrenValues - the values of this attribute for all children rows, in the same order as the children rows

context - loading context

Returns:

the calculated value