Package org.apache.commons.collections4.collection

Interface CompositeCollection.CollectionMutator<E>

Type Parameters:

E - the element being held in the collection

All Superinterfaces:

Serializable

Enclosing class:

CompositeCollection<E>

public static interface CompositeCollection.CollectionMutator<E>
extends Serializable

Pluggable strategy to handle changes to the composite.

Method Summary

Modifier and Type	Method	Description
boolean	add(CompositeCollection<E> composite, List<Collection<E>> collections, E obj)	Called when an object is to be added to the composite.
boolean	addAll(CompositeCollection<E> composite, List<Collection<E>> collections, Collection<? extends E> coll)	Called when a collection is to be added to the composite.
boolean	remove(CompositeCollection<E> composite, List<Collection<E>> collections, Object obj)	Called when an object is to be removed to the composite.

Method Detail

add

boolean add(CompositeCollection<E> composite,
            List<Collection<E>> collections,
            E obj)

Called when an object is to be added to the composite.

Parameters:

composite - the CompositeCollection being changed

collections - all of the Collection instances in this CompositeCollection

obj - the object being added

Returns:

true if the collection is changed

Throws:

UnsupportedOperationException - if add is unsupported

ClassCastException - if the object cannot be added due to its type

NullPointerException - if the object cannot be added because its null

IllegalArgumentException - if the object cannot be added

addAll

boolean addAll(CompositeCollection<E> composite,
               List<Collection<E>> collections,
               Collection<? extends E> coll)

Called when a collection is to be added to the composite.

Parameters:

composite - the CompositeCollection being changed

collections - all of the Collection instances in this CompositeCollection

coll - the collection being added

Returns:

true if the collection is changed

Throws:

UnsupportedOperationException - if add is unsupported

ClassCastException - if the object cannot be added due to its type

NullPointerException - if the object cannot be added because its null

IllegalArgumentException - if the object cannot be added

remove

boolean remove(CompositeCollection<E> composite,
               List<Collection<E>> collections,
               Object obj)

Called when an object is to be removed to the composite.

Parameters:

composite - the CompositeCollection being changed

collections - all of the Collection instances in this CompositeCollection

obj - the object being removed

Returns:

true if the collection is changed

Throws:

UnsupportedOperationException - if removed is unsupported

ClassCastException - if the object cannot be removed due to its type

NullPointerException - if the object cannot be removed because its null

IllegalArgumentException - if the object cannot be removed