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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
Authors:
Stephen Colebourne
Matthew Hawthorne

Constructor Summary

TypedList()

Restrictive constructor.

Method Summary

static List

decorate(List list, Class type)

Factory method to create a typed list.

Constructor Details

TypedList

protected TypedList()

Restrictive constructor.

Method Details

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:
- if list or type is null
- if the list contains invalid elements