de.intarsys.tools.reflect

Interface IRelationHandler<C,E>

All Known Implementing Classes:

CollectionRelationHandler, GenericRelationHandler, MapRelationHandler, ReflectionRelationHandler, RelationHandlerAdapter

public interface IRelationHandler<C,E>

An object that can manage a relationship from an owner to a collection of associated components. This is quite useful for generic implementation of "list viewer" ui interface components.

Method Summary

Methods

Modifier and Type	Method and Description
E[]	get(C owner) The objects associated with owner.
C	getOwner(E element) The owner associated with the element.
E	insert(C owner, E value) Add a new object to the association in owner.
E	remove(C owner, E value) Remove an object from the association in owner.
int	size(C owner) The number of objects associated with owner.
E	update(C owner, E value, E newValue) Update value in the association for owner to newValue

Method Detail

get

E[] get(C owner)

The objects associated with owner.

Parameters:

owner -

Returns:

The objects associated with owner.

getOwner

C getOwner(E element)

The owner associated with the element. This may return null for associations that do not support inverse navigation.

Parameters:

element -

Returns:

The owner associated with the element.

insert

E insert(C owner,
       E value)

Add a new object to the association in owner.

Parameters:

owner -

value -

Returns:

The object inserted

remove

E remove(C owner,
       E value)

Remove an object from the association in owner.

Parameters:

owner -

value -

Returns:

The object removed

size

int size(C owner)

The number of objects associated with owner.

Parameters:

owner -

Returns:

The number of objects associated with owner.

update

E update(C owner,
       E value,
       E newValue)

Update value in the association for owner to newValue

Parameters:

owner -

value -

newValue -

Returns:

The newly associated object