org.apache.commons.collections.bag
public class TypedBag extends Object
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.
Since: Commons Collections 3.0
Version: $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
Constructor Summary | |
---|---|
protected | TypedBag()
Restrictive constructor. |
Method Summary | |
---|---|
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.
Parameters: bag the bag to decorate, must not be null type the type to allow into the bag, must not be null
Returns: a new typed Bag
Throws: IllegalArgumentException if bag or type is null IllegalArgumentException if the bag contains invalid elements