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: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
    Author:
    Stephen Colebourne, Matthew Hawthorne
    • 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