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

Class DelegatingScanningAttributeLoader<T>

Object

DelegatingAttributeLoader<T,L>

DelegatingRowAttributeLoader<T,ScanningAttributeLoader<T>>

DelegatingScanningAttributeLoader<T>

All Implemented Interfaces:

AttributeLoader<T>, MultiRowAttributeLoader<T>, RowAttributeLoader<T>, ScanningAttributeLoader<T>

public class DelegatingScanningAttributeLoader<T>
extends DelegatingRowAttributeLoader<T,ScanningAttributeLoader<T>>
implements ScanningAttributeLoader<T>

Constructor Summary

Constructors

Constructor and Description
DelegatingScanningAttributeLoader(ScanningAttributeLoader<T> loader)

Method Summary

Modifier and Type	Method and Description
AttributeValue<T>	loadValue(AttributeValue<T> precedingValue, ScanningAttributeContext context) Performs scanning 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

DelegatingScanningAttributeLoader

public DelegatingScanningAttributeLoader(@NotNull
                                         ScanningAttributeLoader<T> loader)

Method Detail

loadValue

@Nullable
public AttributeValue<T> loadValue(@NotNull
                                             AttributeValue<T> precedingValue,
                                             @NotNull
                                             ScanningAttributeContext context)

Description copied from interface: ScanningAttributeLoader

Performs scanning loading. Must be a pure function - see ScanningAttributeLoader.

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 scanning loaders work on the same attribute, it could be tricky and lead to unexpected results.)

Specified by:

loadValue in interface ScanningAttributeLoader<T>

Parameters:

precedingValue - the value of this attribute for the immediately preceding row, or AttributeValue.undefined() for the very first row

context - loading context

Returns:

the calculated value