org.apache.commons.collections.bidimap.package.html Maven / Gradle / Ivy
This package contains implementations of the
{@link org.apache.commons.collections.BidiMap BidiMap},
{@link org.apache.commons.collections.OrderedBidiMap OrderedBidiMap} and
{@link org.apache.commons.collections.SortedBidiMap SortedBidiMap} interfaces.
A BidiMap is an extension to Map that allows keys and values to be looked up with equal ease.
One example usage is a system communicating to a legacy datasource that must convert codes
from the new format to the old format and vice versa.
The following implementations are provided in the package:
- DualHashBidiMap - uses two HashMaps to implement BidiMap
- DualTreeBidiMap - uses two TreeMaps to implement SortedBidiMap
- TreeBidiMap - red-black tree implementation of OrderedBidiMap
The following decorators are provided in the package:
- Unmodifiable - ensures the map cannot be altered