Apache Commons Collections 4.4 · org.apache.commons.collections4.bag

This package contains implementations of 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 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
Transformed - transforms each element added to the bag
Collection - ensures compliance with the java.util.Collection contract

Class Summary

Modifier and Type	Class and Description
public abstract class	AbstractBagDecorator< the type of elements in this bag E> Decorates another `Bag` to provide additional behaviour.
public abstract class	AbstractMapBag< the type of elements in this bag E> Abstract implementation of the `Bag` interface to simplify the creation of subclass implementations.
public abstract class	AbstractSortedBagDecorator< the type of elements in this bag E> Decorates another `SortedBag` to provide additional behaviour.
public class	CollectionBag< the type of elements in this bag E> Decorates another `Bag` to comply with the Collection contract.
public class	CollectionSortedBag< the type of elements in this bag E> Decorates another `SortedBag` to comply with the Collection contract.
public class	HashBag< the type of elements in this bag E> Implements `Bag`, using a `HashMap` to provide the data storage.
public class	PredicatedBag< the type of elements in this bag E> Decorates another `Bag` to validate that additions match a specified predicate.
public class	PredicatedSortedBag< the type of elements in this bag E> Decorates another `SortedBag` to validate that additions match a specified predicate.
public class	SynchronizedBag< the type of elements in this bag E> Decorates another `Bag` to synchronize its behaviour for a multi-threaded environment.
public class	SynchronizedSortedBag< the type of elements in this bag E> Decorates another `SortedBag` to synchronize its behaviour for a multi-threaded environment.
public class	TransformedBag< the type of elements in this bag E> Decorates another `Bag` to transform objects that are added.
public class	TransformedSortedBag< the type of elements in this bag E> Decorates another `SortedBag` to transform objects that are added.
public class	TreeBag< the type of elements in this bag E> Implements `SortedBag`, using a `TreeMap` to provide the data storage.
public class	UnmodifiableBag< the type of elements in this bag E> Decorates another `Bag` to ensure it can't be altered.
public class	UnmodifiableSortedBag< the type of elements in this bag E> Decorates another `SortedBag` to ensure it can't be altered.

Package org.apache.commons.collections4.bag

Class Summary