T
- the type of domain object the Locator will operate onI
- the type of object the Locator expects to use as an id for the
domain objectpublic abstract class Locator<T,I> extends Object
findFoo()
,
getId()
, and getVersion()
declared in the domain entity type,
an instance of a Locator will be created to provide implementations of these
methods.
Locator subtypes must be default instantiable (i.e. public static types with a no-arg constructor). Instances of Locators may be retained and reused by the RequestFactory service layer.
ProxyFor.locator()
Constructor and Description |
---|
Locator() |
Modifier and Type | Method and Description |
---|---|
abstract T |
create(Class<? extends T> clazz)
Create a new instance of the requested type.
|
abstract T |
find(Class<? extends T> clazz,
I id)
Retrieve an object.
|
abstract Class<T> |
getDomainType()
Returns the
T type. |
abstract I |
getId(T domainObject)
Returns a domain object to be used as the id for the given object.
|
abstract Class<I> |
getIdType()
Returns the
I type. |
abstract Object |
getVersion(T domainObject)
Returns a domain object to be used as the version for the given object.
|
boolean |
isLive(T domainObject)
Returns a value indicating if the domain object should no longer be
considered accessible.
|
public abstract T create(Class<? extends T> clazz)
clazz
- the type of object to createpublic abstract T find(Class<? extends T> clazz, I id)
null
to indicate that the requested
object could not be found.clazz
- the type of object to retrieveid
- an id previously returned from getId(Object)
null
if it could not be foundpublic abstract I getId(T domainObject)
null
if the object has not been persisted or
should be treated as irretrievable.domainObject
- the object to obtain an id fornull
public abstract Object getVersion(T domainObject)
null
if the object has not been persisted or
should be treated as irretrievable.domainObject
- the object to obtain an id fornull
public boolean isLive(T domainObject)
The default implementation of this method uses getId(Object)
and
find(Class, Object)
to determine if an object can be retrieved.
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