org.apache.commons.collections.set
Class TransformedSet

java.lang.Object
  org.apache.commons.collections.collection.AbstractCollectionDecorator<E>
      org.apache.commons.collections.collection.AbstractSerializableCollectionDecorator
          org.apache.commons.collections.collection.TransformedCollection
              org.apache.commons.collections.set.TransformedSet

All Implemented Interfaces:

Serializable, Iterable, Collection, Set

Direct Known Subclasses:

TransformedSortedSet

public class TransformedSet
extends TransformedCollection
implements Set

Decorates another Set to transform objects that are added.

The add methods are affected by this class. Thus objects must be removed or searched for using their transformed form. For example, if the transformation converts Strings to Integers, you must use the Integer form to remove objects.

This class is Serializable from Commons Collections 3.1.

Note: This class cannot support generics without breaking the Collection contract.

Since:

Commons Collections 3.0

Version:

$Revision: 1.2 $ $Date: 2005/05/23 14:42:13 $

Author:

Matt Hall, John Watkinson, Stephen Colebourne

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.commons.collections.collection.TransformedCollection

transformer

Fields inherited from class org.apache.commons.collections.collection.AbstractCollectionDecorator

collection

Constructor Summary

protected

TransformedSet(Set set, Transformer transformer) Constructor that wraps (not copies).

Method Summary

static <I,O> Set<O>

decorate(Set<I> set, Transformer<? super I,? extends O> transformer) Factory method to create a transforming set.

Methods inherited from class org.apache.commons.collections.collection.TransformedCollection

add, addAll, addAllTyped, addTyped, decorate, transform, transform

Methods inherited from class org.apache.commons.collections.collection.AbstractCollectionDecorator

clear, contains, containsAll, equals, getCollection, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Constructor Detail

TransformedSet

protected TransformedSet(Set set,
                         Transformer transformer)

Constructor that wraps (not copies).

If there are any elements already in the set being decorated, they are NOT transformed.

Parameters:

set - the set to decorate, must not be null

transformer - the transformer to use for conversion, must not be null

Throws:

IllegalArgumentException - if set or transformer is null

Method Detail

decorate

public static <I,O> Set<O> decorate(Set<I> set,
                                    Transformer<? super I,? extends O> transformer)

Factory method to create a transforming set.

If there are any elements already in the set being decorated, they are NOT transformed.

Parameters:

set - the set to decorate, must not be null

transformer - the transformer to use for conversion, must not be null

Throws:

IllegalArgumentException - if set or transformer is null