org.apache.commons.collections.bag
Class TypedBag
java.lang.Object
|
+--org.apache.commons.collections.bag.TypedBag
- public class TypedBag
- extends 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.
- Since:
- Commons Collections 3.0
- Version:
- $Revision: 1.3 $ $Date: 2004/01/14 21:43:08 $
- Author:
- Stephen Colebourne, Matthew Hawthorne
Constructor Summary |
protected |
TypedBag()
Restrictive constructor. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
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.
- Parameters:
bag
- the bag to decorate, must not be nulltype
- the type to allow into the bag, must not be null- Throws:
IllegalArgumentException
- if bag or type is nullIllegalArgumentException
- if the bag contains invalid elements
Copyright © 2001-2004 Apache Software Foundation. All Rights Reserved.