org.apache.commons.collections.list

Class TypedList

public class TypedList extends Object

Decorates another List 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) $

Author: Stephen Colebourne Matthew Hawthorne

Constructor Summary
protected TypedList()
Restrictive constructor.
Method Summary
static Listdecorate(List list, Class type)
Factory method to create a typed list.

Constructor Detail

TypedList

protected TypedList()
Restrictive constructor.

Method Detail

decorate

public static List decorate(List list, Class type)
Factory method to create a typed list.

If there are any elements already in the list being decorated, they are validated.

Parameters: list the list to decorate, must not be null type the type to allow into the collection, must not be null

Throws: IllegalArgumentException if list or type is null IllegalArgumentException if the list contains invalid elements

Copyright © 2001-2008 Apache Software Foundation. All Rights Reserved.