Package org.apache.commons.collections.bag
This package contains implementations of the
Bag
and
SortedBag
interfaces.
A bag stores an object and a count of the number of occurences of the object.
The following implementations are provided in the package:
- HashBag - implementation that uses a HashMap to store the data
- TreeBag - implementation that uses a TreeMap to store the data
The following decorators are provided in the package:
- Synchronized - synchronizes method access for multi-threaded environments
- Unmodifiable - ensures the bag cannot be altered
- Predicated - ensures that only elements that are valid according to a predicate can be added
- Typed - ensures that only elements that are of a specific type can be added
- Transformed - transforms each element added to the bag
-
Class Summary Class Description AbstractBagDecorator Decorates anotherBag
to provide additional behaviour.AbstractMapBag Abstract implementation of theBag
interface to simplify the creation of subclass implementations.AbstractSortedBagDecorator Decorates anotherSortedBag
to provide additional behaviour.HashBag ImplementsBag
, using aHashMap
to provide the data storage.PredicatedBag Decorates anotherBag
to validate that additions match a specified predicate.PredicatedSortedBag Decorates anotherSortedBag
to validate that additions match a specified predicate.SynchronizedBag Decorates anotherBag
to synchronize its behaviour for a multi-threaded environment.SynchronizedSortedBag Decorates anotherSortedBag
to synchronize its behaviour for a multi-threaded environment.TransformedBag Decorates anotherBag
to transform objects that are added.TransformedSortedBag Decorates anotherSortedBag
to transform objects that are added.TreeBag ImplementsSortedBag
, using aTreeMap
to provide the data storage.TypedBag Decorates anotherBag
to validate that elements added are of a specific type.TypedSortedBag Decorates anotherSortedBag
to validate that elements added are of a specific type.UnmodifiableBag Decorates anotherBag
to ensure it can't be altered.UnmodifiableSortedBag Decorates anotherSortedBag
to ensure it can't be altered.