Package org.apache.commons.collections4.bag

package org.apache.commons.collections4.bag

Implements the Bag and SortedBag interfaces. A bag stores an object and a count of the number of occurrences 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 multithreaded environments
• Unmodifiable - ensures the bag cannot be altered
• Predicated - ensures that only elements that are valid according to a predicate can be added
• Transformed - transforms each element added to the bag
• Collection - ensures compliance with the java.util.Collection contract

This package is deprecated since 4.6.0; use the org.apache.commons.collections4.multiset package instead. See the Bag Javadoc for migration notes.

Related Packages

Package	Description
org.apache.commons.collections4	Interfaces and utilities shared across all packages.

Classes

Class	Description
AbstractBagDecorator<E>	Deprecated. Since 4.6.0, use AbstractMultiSetDecorator instead.
AbstractMapBag<E>	Deprecated. Since 4.6.0, use AbstractMapMultiSet instead.
AbstractMapBag.MutableInteger	Mutable integer class for storing the data.
AbstractSortedBagDecorator<E>	Deprecated. Since 4.6.0, use AbstractSortedMultiSetDecorator instead.
CollectionBag<E>	Deprecated. Since 4.6.0, no longer needed; a MultiSet already complies with the Collection contract.
CollectionSortedBag<E>	Deprecated. Since 4.6.0, no longer needed; a SortedMultiSet already complies with the Collection contract.
HashBag<E>	Deprecated. Since 4.6.0, use HashMultiSet instead.
PredicatedBag<E>	Deprecated. Since 4.6.0, use PredicatedMultiSet instead.
PredicatedSortedBag<E>	Deprecated. Since 4.6.0, use PredicatedSortedMultiSet instead.
SynchronizedBag<E>	Deprecated. Since 4.6.0, use SynchronizedMultiSet instead.
SynchronizedSortedBag<E>	Deprecated. Since 4.6.0, use SynchronizedSortedMultiSet instead.
TransformedBag<E>	Deprecated. Since 4.6.0, use TransformedMultiSet instead.
TransformedSortedBag<E>	Deprecated. Since 4.6.0, use TransformedSortedMultiSet instead.
TreeBag<E>	Deprecated. Since 4.6.0, use TreeMultiSet instead.
UnmodifiableBag<E>	Deprecated. Since 4.6.0, use UnmodifiableMultiSet instead.
UnmodifiableSortedBag<E>	Deprecated. Since 4.6.0, use UnmodifiableSortedMultiSet instead.