Package org.apache.commons.collections.set

Class CompositeSet

java.lang.Object

org.apache.commons.collections.collection.CompositeCollection

org.apache.commons.collections.set.CompositeSet

All Implemented Interfaces:

java.lang.Iterable, java.util.Collection, java.util.Set

public class CompositeSet
extends CompositeCollection
implements java.util.Set

Decorates a set of other sets to provide a single unified view.

Changes made to this set will actually be made on the decorated set. Add operations require the use of a pluggable strategy. If no strategy is provided then add is unsupported.

Since:

Commons Collections 3.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	CompositeSet.SetMutator	Define callbacks for mutation operations.

Nested classes/interfaces inherited from class org.apache.commons.collections.collection.CompositeCollection

CompositeCollection.CollectionMutator

Constructor Summary

Constructors

Constructor	Description
CompositeSet()	Create an empty CompositeSet
CompositeSet(java.util.Set set)	Create a CompositeSet with just set composited
CompositeSet(java.util.Set[] sets)	Create a composite set with sets as the initial set of composited Sets

Method Summary

Modifier and Type	Method	Description
void	addComposited(java.util.Collection c)	Add a Set to this composite
void	addComposited(java.util.Collection[] comps)	Add an array of sets to this composite
void	addComposited(java.util.Collection c, java.util.Collection d)	Add two sets to this composite
boolean	equals(java.lang.Object obj)
int	hashCode()
boolean	remove(java.lang.Object obj)	If a CollectionMutator is defined for this CompositeSet then this method will be called anyway.
void	setMutator(CompositeCollection.CollectionMutator mutator)	This can receive either a CompositeCollection.CollectionMutator or a CompositeSet.SetMutator.

Methods inherited from class org.apache.commons.collections.collection.CompositeCollection

add, addAll, clear, contains, containsAll, getCollections, isEmpty, iterator, removeAll, removeComposited, retainAll, size, toArray, toArray, toCollection

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, isEmpty, iterator, removeAll, retainAll, size, spliterator, toArray, toArray

Constructor Detail

CompositeSet

public CompositeSet()

Create an empty CompositeSet

CompositeSet

public CompositeSet(java.util.Set set)

Create a CompositeSet with just set composited

Parameters:

set - The initial set in the composite

CompositeSet

public CompositeSet(java.util.Set[] sets)

Create a composite set with sets as the initial set of composited Sets

Method Detail

addComposited

public void addComposited(java.util.Collection c)

Add a Set to this composite

Overrides:

addComposited in class CompositeCollection

Parameters:

c - Must implement Set

Throws:

java.lang.IllegalArgumentException - if c does not implement java.util.Set or if a SetMutator is set, but fails to resolve a collision

java.lang.UnsupportedOperationException - if there is no SetMutator set, or a CollectionMutator is set instead of a SetMutator

See Also:

CompositeCollection.CollectionMutator, CompositeSet.SetMutator

addComposited

public void addComposited(java.util.Collection c,
                          java.util.Collection d)

Add two sets to this composite

Overrides:

addComposited in class CompositeCollection

Parameters:

c - the first collection to add

d - the second collection to add

Throws:

java.lang.IllegalArgumentException - if c or d does not implement java.util.Set

addComposited

public void addComposited(java.util.Collection[] comps)

Add an array of sets to this composite

Overrides:

addComposited in class CompositeCollection

Parameters:

comps -

Throws:

java.lang.IllegalArgumentException - if any of the collections in comps do not implement Set

setMutator

public void setMutator(CompositeCollection.CollectionMutator mutator)

This can receive either a CompositeCollection.CollectionMutator or a CompositeSet.SetMutator. If a CompositeCollection.CollectionMutator is used than conflicts when adding composited sets will throw IllegalArgumentException

Overrides:

setMutator in class CompositeCollection

Parameters:

mutator - the mutator to use

remove

public boolean remove(java.lang.Object obj)

If a CollectionMutator is defined for this CompositeSet then this method will be called anyway.

Specified by:

remove in interface java.util.Collection

Specified by:

remove in interface java.util.Set

Overrides:

remove in class CompositeCollection

Parameters:

obj - Object to be removed

Returns:

true if the object is removed, false otherwise

equals

public boolean equals(java.lang.Object obj)

Specified by:

equals in interface java.util.Collection

Specified by:

equals in interface java.util.Set

Overrides:

equals in class java.lang.Object

See Also:

Set.equals(java.lang.Object)

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection

Specified by:

hashCode in interface java.util.Set

Overrides:

hashCode in class java.lang.Object

See Also:

Set.hashCode()