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org.apache.commons.collections.collection

Class TypedCollection

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


public class TypedCollection
extends java.lang.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
Authors:
Stephen Colebourne
Matthew Hawthorne

Constructor Summary

TypedCollection()

Restrictive constructor.

Method Summary

static Collection

decorate(Collection coll, Class type)

Factory method to create a typed collection.

Constructor Details

TypedCollection

protected TypedCollection()

Restrictive constructor.

Method Details

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
Throws:
- if collection or type is null
- if the collection contains invalid elements