org.apache.commons.collections.list
Class TypedList

java.lang.Object
  |
  +--org.apache.commons.collections.list.TypedList

public class TypedList

extends java.lang.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: 1.4 $ $Date: 2004/05/07 23:28:38 $

Author:

Stephen Colebourne, Matthew Hawthorne

Method Summary

static java.util.List

decorate(java.util.List list, java.lang.Class type) Factory method to create a typed list.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

decorate

public static java.util.List decorate(java.util.List list,
                                      java.lang.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:

java.lang.IllegalArgumentException - if list or type is null

java.lang.IllegalArgumentException - if the list contains invalid elements