COLLECTION
- is the generic Collection
-type.public interface CollectionFactory<COLLECTION extends Collection>
Collection
s. It allows to abstract from Collection
implementations. Collection
instance can be used for different purposes such as a set or a list or with different
aspects such as a thread-safe collection. If you write a generic component different users of that
component may expect different aspects of your component and therefore the underlying Collection
. inject
an instance of this
interface to override the default, your code will increase usability. CollectionFactory
rather than a Collection
instance to the
constructor?Class
to Class<?>
) you would break
compatibility of the users of your code. Additionally you may want to express that the Collection
should be empty and/or NOT shared with others. Anyways the interface can obviously NOT guarantee this.Modifier and Type | Method and Description |
---|---|
<E> Collection<E> |
create()
This method creates a new
Collection instance. |
<E> Collection<E> |
create(int capacity)
This method creates a new
Collection instance with the given initial capacity . |
COLLECTION |
createGeneric()
This method creates a new instance of the generic
Collection type <COLLECTION>
. |
COLLECTION |
createGeneric(int capacity)
This method creates a new instance of the generic
Collection type <COLLECTION>
with the given initial capacity . |
Class<? extends COLLECTION> |
getCollectionImplementation()
This method gets the implementation of the
collection-interface used by
this factory. |
Class<COLLECTION> |
getCollectionInterface()
This method gets the interface of the
Collection managed by this factory. |
Class<COLLECTION> getCollectionInterface()
Collection
managed by this factory.Collection
interface.Class<? extends COLLECTION> getCollectionImplementation()
collection-interface
used by
this factory.Collection
implementation.COLLECTION createGeneric()
Collection
type <COLLECTION>
.COLLECTION createGeneric(int capacity)
Collection
type <COLLECTION>
with the given initial capacity
.capacity
- is the initial capacity of the collection.<E> Collection<E> create()
Collection
instance. Collection
can NOT be bound to the generic type <COLLECTION>
because of
limitations in Java's generic type system. You need to work on the actual sub-interface (e.g.
ListFactory
) to get the proper result type.E
- the type of elements contained in the collection.createGeneric()
<E> Collection<E> create(int capacity)
Collection
instance with the given initial capacity
. Collection
can NOT be bound to the generic type <COLLECTION>
because of
limitations in Java's generic type system. You need to work on the actual sub-interface (e.g.
ListFactory
) to get the proper result type.E
- the type of elements contained in the collection.capacity
- is the initial capacity of the collection.createGeneric(int)
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