org.wamblee.persistence
Class AbstractDetachable<T,Ref>

java.lang.Object
  org.wamblee.persistence.AbstractDetachable<T,Ref>

Type Parameters:

T - The type of the object to be attached/detached

Ref - The type of the reference to store when the object is detached.

All Implemented Interfaces:

Serializable, Detachable<T>

Direct Known Subclasses:

JpaDetachable

public abstract class AbstractDetachable<T,Ref>
extends Object
implements Detachable<T>

Detachable implementation that takes care of the basic logic for detachable objects. All that needs to be done is to implement #load().

See Also:

Serialized Form

Constructor Summary

protected

AbstractDetachable(T aObject) Constructs the detachable.

Method Summary

void	detach() Detaches the object.
T	get() Gets the object, attaching it if needed.
protected abstract Ref	getReference(T aObject) Obtains the reference for a given object.
protected abstract T	load(Ref aReference) Loads the object based on a reference.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractDetachable

protected AbstractDetachable(T aObject)

Constructs the detachable.

Parameters:

aObject - Object.

Throws:

IllegalArgumentException - When the object passed in is null.

Method Detail

detach

public void detach()

Description copied from interface: Detachable

Detaches the object.

Specified by:

detach in interface Detachable<T>

get

public T get()

Description copied from interface: Detachable

Gets the object, attaching it if needed.

Specified by:

get in interface Detachable<T>

Returns:

load

protected abstract T load(Ref aReference)

Loads the object based on a reference.

Parameters:

aReference - Reference.

Returns:

Object (may be null ).

getReference

protected abstract Ref getReference(T aObject)

Obtains the reference for a given object.

Parameters:

aObject - Object.

Returns:

Reference.