Package org.apache.commons.collections.set

This package contains implementations of the Set and SortedSet 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:

• Synchronized - synchronizes method access for multi-threaded environments
• Unmodifiable - ensures the collection 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
• ListOrdered - ensures that insertion order is retained
• MapBackedSet - a set formed by decorating a Map

Interface Summary

Interface	Description
CompositeSet.SetMutator	Define callbacks for mutation operations.

Class Summary

Class	Description
AbstractSerializableSetDecorator	Serializable subclass of AbstractSetDecorator.
AbstractSetDecorator	Decorates another Set to provide additional behaviour.
AbstractSortedSetDecorator	Decorates another SortedSet to provide additional behaviour.
CompositeSet	Decorates a set of other sets to provide a single unified view.
ListOrderedSet	Decorates another Set to ensure that the order of addition is retained and used by the iterator.
MapBackedSet	Decorates a Map to obtain Set behaviour.
PredicatedSet	Decorates another Set to validate that all additions match a specified predicate.
PredicatedSortedSet	Decorates another SortedSet to validate that all additions match a specified predicate.
SynchronizedSet	Decorates another Set to synchronize its behaviour for a multi-threaded environment.
SynchronizedSortedSet	Decorates another SortedSet to synchronize its behaviour for a multi-threaded environment.
TransformedSet	Decorates another Set to transform objects that are added.
TransformedSortedSet	Decorates another SortedSet to transform objects that are added.
TypedSet	Decorates another Set to validate that elements added are of a specific type.
TypedSortedSet	Decorates another SortedSet to validate that elements added are of a specific type.
UnmodifiableSet	Decorates another Set to ensure it can't be altered.
UnmodifiableSortedSet	Decorates another SortedSet to ensure it can't be altered.