Package arez.component

Class TypeBasedLocator

java.lang.Object

arez.component.TypeBasedLocator

All Implemented Interfaces:

Locator

@OmitType(unless="arez.enable_references")
public final class TypeBasedLocator
extends Object
implements Locator

An Locator implementation where you can register a function-per type to be resolved.

Constructor Summary

Constructors

Constructor	Description
TypeBasedLocator()

Method Summary

Modifier and Type	Method	Description
<T> T	findById(Class<T> type, Object id)	Lookup the entity with the specified type and the specified id, returning null if not present.
<T> void	registerLookup(Class<T> type, Function<Object,T> findByIdFunction)	Register a function that will find entities of specified type by id.

Methods inherited from class java.lang.Object

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

Constructor Details

TypeBasedLocator

public TypeBasedLocator()

Method Details

registerLookup

public <T> void registerLookup(@Nonnull Class<T> type,
 @Nonnull Function<Object,T> findByIdFunction)

Register a function that will find entities of specified type by id. This must not be invoked if another function has already been registered for type.

Type Parameters:

T - the type of the entity.

Parameters:

type - the type of the entity.

findByIdFunction - the function that looks up the entity by id.

findById

@Nullable public <T> T findById(@Nonnull Class<T> type,
 @Nonnull Object id)

Description copied from interface: Locator

Lookup the entity with the specified type and the specified id, returning null if not present.

Specified by:

findById in interface Locator

Type Parameters:

T - the entity type.

Parameters:

type - the type of the entity.

id - the id of the entity.

Returns:

the entity or null if no such entity.