Package org.apache.commons.collections4.set

This package contains implementations of the Set, SortedSet and NavigableSet interfaces.

The implementations are in the form of direct implementations and decorators. A decorator wraps another implementation of the interface to add some specific additional functionality.

The following implementations are provided in the package:

• CompositeSet - a set that combines multiple sets into one

The following decorators are provided in the package:

• Unmodifiable - ensures the collection cannot be altered
• Predicated - ensures that only elements that are valid according to a predicate can be added
• Transformed - transforms each element added
• ListOrdered - ensures that insertion order is retained
• MapBackedSet - a set formed by decorating a Map

Interface Summary

Interface	Description
CompositeSet.SetMutator<E>	Define callbacks for mutation operations.

Class Summary

Class	Description
AbstractNavigableSetDecorator<E>	Decorates another NavigableSet to provide additional behaviour.
AbstractSerializableSetDecorator<E>	Serializable subclass of AbstractSetDecorator.
AbstractSetDecorator<E>	Decorates another Set to provide additional behaviour.
AbstractSortedSetDecorator<E>	Decorates another SortedSet to provide additional behaviour.
CompositeSet<E>	Decorates a set of other sets to provide a single unified view.
ListOrderedSet<E>	Decorates another Set to ensure that the order of addition is retained and used by the iterator.
MapBackedSet<E,V>	Decorates a Map to obtain Set behaviour.
PredicatedNavigableSet<E>	Decorates another NavigableSet to validate that all additions match a specified predicate.
PredicatedSet<E>	Decorates another Set to validate that all additions match a specified predicate.
PredicatedSortedSet<E>	Decorates another SortedSet to validate that all additions match a specified predicate.
TransformedNavigableSet<E>	Decorates another NavigableSet to transform objects that are added.
TransformedSet<E>	Decorates another Set to transform objects that are added.
TransformedSortedSet<E>	Decorates another SortedSet to transform objects that are added.
UnmodifiableNavigableSet<E>	Decorates another NavigableSet to ensure it can't be altered.
UnmodifiableSet<E>	Decorates another Set to ensure it can't be altered.
UnmodifiableSortedSet<E>	Decorates another SortedSet to ensure it can't be altered.