org.apache.commons.collections.bag
Class TransformedSortedBag

java.lang.Object
  |
  +--org.apache.commons.collections.collection.AbstractCollectionDecorator
        |
        +--org.apache.commons.collections.collection.AbstractSerializableCollectionDecorator
              |
              +--org.apache.commons.collections.collection.TransformedCollection
                    |
                    +--org.apache.commons.collections.bag.TransformedBag
                          |
                          +--org.apache.commons.collections.bag.TransformedSortedBag

All Implemented Interfaces:

Bag, java.util.Collection, java.io.Serializable, SortedBag

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: 1.7 $ $Date: 2004/06/03 22:02:12 $

Author:

Stephen Colebourne

See Also:

Serialized Form

Method Summary

java.util.Comparator	comparator() Returns the comparator associated with this sorted set, or null if it uses its elements' natural ordering.
static SortedBag	decorate(SortedBag bag, Transformer transformer) Factory method to create a transforming sorted bag.
java.lang.Object	first() Returns the first (lowest) member.
java.lang.Object	last() Returns the last (highest) member.

Methods inherited from class org.apache.commons.collections.bag.TransformedBag

add, decorate, getCount, remove, uniqueSet

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

add, addAll, decorate

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

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.commons.collections.Bag

add, add, containsAll, getCount, iterator, remove, remove, removeAll, retainAll, size, uniqueSet

Methods inherited from interface java.util.Collection

addAll, clear, contains, equals, hashCode, isEmpty, toArray, toArray

Method Detail

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:

java.lang.IllegalArgumentException - if bag or transformer is null

first

public java.lang.Object first()

Description copied from interface: SortedBag

Returns the first (lowest) member.

Specified by:

first in interface SortedBag

Returns:

the first element in the sorted bag

last

public java.lang.Object last()

Description copied from interface: SortedBag

Returns the last (highest) member.

Specified by:

last in interface SortedBag

Returns:

the last element in the sorted bag

comparator

public java.util.Comparator comparator()

Description copied from interface: SortedBag

Returns the comparator associated with this sorted set, or null if it uses its elements' natural ordering.

Specified by:

comparator in interface SortedBag

Returns:

the comparator in use, or null if natural ordering