Overview | Package | Class | Use | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.apache.commons.collections.collection
Class TypedCollection

    java.lang.Object
      |
      +--org.apache.commons.collections.collection.TypedCollection

public class TypedCollection
extends Object

Decorates a `Collection` 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: 1.5 $ $Date: 2004/05/15 12:39:13 $
Author:
  Stephen Colebourne, Matthew Hawthorne

Constructor Summary
`protected` | `TypedCollection()` Restrictive constructor.

Method Summary
`static Collection` | `decorate(Collection coll, Class type)` Factory method to create a typed collection.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TypedCollection

    protected TypedCollection()

  Restrictive constructor.

Method Detail

### decorate

    public static Collection decorate(Collection coll,
                                      Class type)

  Factory method to create a typed collection.

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

  Parameters:
    `coll` - the collection to decorate, must not be null
    `type` - the type to allow into the collection, must not be null
  Returns:
    a new typed collection
  Throws:
    `IllegalArgumentException` - if collection or type is null
    `IllegalArgumentException` - if the collection contains invalid elements

Overview | Package | Class | Use | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Copyright © 2001-2004 Apache Software Foundation. All Rights Reserved.