org.apache.commons.collections.bag

Class TransformedSortedBag

public class TransformedSortedBag extends TransformedBag implements SortedBag

Decorates another SortedBag 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.

Since: Commons Collections 3.0

Version: $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $

Author: Stephen Colebourne

Constructor Summary
protected TransformedSortedBag(SortedBag bag, Transformer transformer)
Constructor that wraps (not copies).
Method Summary
Comparatorcomparator()
static SortedBagdecorate(SortedBag bag, Transformer transformer)
Factory method to create a transforming sorted bag.
Objectfirst()
protected SortedBaggetSortedBag()
Gets the decorated bag.
Objectlast()

Constructor Detail

TransformedSortedBag

protected TransformedSortedBag(SortedBag bag, Transformer transformer)
Constructor that wraps (not copies).

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

Parameters: bag the bag to decorate, must not be null transformer the transformer to use for conversion, must not be null

Throws: IllegalArgumentException if bag or transformer is null

Method Detail

comparator

public Comparator comparator()

decorate

public static SortedBag decorate(SortedBag bag, Transformer transformer)
Factory method to create a transforming sorted bag.

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

Parameters: bag the bag to decorate, must not be null transformer the transformer to use for conversion, must not be null

Returns: a new transformed SortedBag

Throws: IllegalArgumentException if bag or transformer is null

first

public Object first()

getSortedBag

protected SortedBag getSortedBag()
Gets the decorated bag.

Returns: the decorated bag

last

public Object last()
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