## Package org.apache.commons.collections.keyvalue

This package contains implementations of collection and map related key/value classes.

See:
Description

Class Summary
AbstractKeyValue: Abstract pair class to assist with creating KeyValue and MapEntry implementations.
AbstractMapEntry: Abstract Pair class to assist with creating correct Map Entry implementations.
AbstractMapEntryDecorator: Provides a base decorator that allows additional functionality to be added to a Map Entry.
DefaultKeyValue: A mutable KeyValue pair that does not implement MapEntry.
DefaultMapEntry: A restricted implementation of `Map.Entry` that prevents the MapEntry contract from being broken.
MultiKey: A `MultiKey` allows multiple map keys to be merged together.
TiedMapEntry: A Map Entry tied to a map underneath.
UnmodifiableMapEntry: A `Map.Entry` that throws UnsupportedOperationException when `setValue` is called.

## Package org.apache.commons.collections.keyvalue Description

This package contains implementations of collection and map related key/value classes. These are usually used in maps, however they can be used as data holders in any collection.

The following key/value designs are included:

- Map Entry - various map entry implementations
- KeyValue - a key and value pair, without map entry semantics
- MultiKey - a holder of multiple keys tied together

Copyright © 2001-2005 Apache Software Foundation. All Rights Reserved.