org.apache.commons.collections.bag
Class TypedBag
java.lang.Object
|
+--org.apache.commons.collections.bag.TypedBag
public class TypedBag
extends java.lang.Object
Decorates another
Bag
to validate that elements added
are of a specific type.
The validation of additions is performed via an instanceof test against
a specified
Class
. If an object cannot be added to the
collection, an IllegalArgumentException is thrown.
- Commons Collections 3.0
- Stephen Colebourne
- Matthew Hawthorne
TypedBag
protected TypedBag()
Restrictive constructor.
decorate
public static Bag decorate(Bag bag, Class type)
Factory method to create a typed bag.
If there are any elements already in the bag being decorated, they
are validated.
- bag - the bag to decorate, must not be null
- type - the type to allow into the bag, must not be null
- if bag or type is null
- if the bag contains invalid elements
Bag
to validate that elements added are of a specific type. The validation of additions is performed via an instanceof test against a specifiedClass
. If an object cannot be added to the collection, an IllegalArgumentException is thrown.