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Java Source Code / Java Documentation » Rule Engine » drolls Rule Engine » org.drools.util

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.drools.util .CompositeCollection

CompositeCollection
public class CompositeCollection implements Collection(Code)
	Decorates a collection of other collections to provide a single unified view. Changes made to this collection will actually be made on the decorated collection. Add and remove operations require the use of a pluggable strategy. If no strategy is provided then add and remove are unsupported. since: Commons Collections 3.0 version: $Revision: 1.1 $ $Date: 2005/07/26 01:06:32 $ author: Brian McCallister author: Stephen Colebourne author: Phil Steitz

Inner Class :public interface CollectionMutator

Field Summary
protected Collection[]	all
protected CollectionMutator	mutator

Constructor Summary
public	CompositeCollection() Create an empty CompositeCollection.
public	CompositeCollection(Collection coll) Create a Composite Collection with only coll composited.
public	CompositeCollection(Collection[] colls) Create a CompositeCollection with colls as the initial list of composited collections.

Method Summary
public boolean	add(Object obj) Adds an object to the collection, throwing UnsupportedOperationException unless a CollectionMutator strategy is specified.
public boolean	addAll(Collection coll) Adds a collection of elements to this collection, throwing UnsupportedOperationException unless a CollectionMutator strategy is specified.
public void	addComposited(Collection[] comps)
public void	addComposited(Collection c) Add an additional collection to this composite.
public void	addComposited(Collection c, Collection d) Add two additional collections to this composite.
public void	clear() Removes all of the elements from this collection .
public boolean	contains(Object obj) Checks whether this composite collection contains the object.
public boolean	containsAll(Collection coll) Checks whether this composite contains all the elements in the specified collection.
public Collection	getCollections() Gets the collections being decorated.
public boolean	isEmpty() Checks whether this composite collection is empty.
public Iterator	iterator() Gets an iterator over all the collections in this composite. This implementation uses an `IteratorChain`. an `IteratorChain` instance which supports`remove()`.
public boolean	remove(Object obj) Removes an object from the collection, throwing UnsupportedOperationException unless a CollectionMutator strategy is specified.
public boolean	removeAll(Collection coll) Removes the elements in the specified collection from this composite collection.
public void	removeComposited(Collection coll) Removes a collection from the those being decorated in this composite.
public boolean	retainAll(Collection coll) Retains all the elements in the specified collection in this composite collection, removing all others.
public void	setMutator(CollectionMutator mutator) Specify a CollectionMutator strategy instance to handle changes.
public int	size() Gets the size of this composite collection.
public Object[]	toArray() Returns an array containing all of the elements in this composite.
public Object[]	toArray(Object[] array) Returns an object array, populating the supplied array if possible.
public Collection	toCollection()

Field Detail

all
protected Collection[] all(Code)
	Collections in the composite

mutator
protected CollectionMutator mutator(Code)
	CollectionMutator to handle changes to the collection

Constructor Detail

CompositeCollection
public CompositeCollection()(Code)
	Create an empty CompositeCollection.

CompositeCollection
public CompositeCollection(Collection coll)(Code)
	Create a Composite Collection with only coll composited. Parameters: coll - a collection to decorate

CompositeCollection
public CompositeCollection(Collection[] colls)(Code)
	Create a CompositeCollection with colls as the initial list of composited collections. Parameters: colls - an array of collections to decorate

Method Detail

add
public boolean add(Object obj)(Code)
	Adds an object to the collection, throwing UnsupportedOperationException unless a CollectionMutator strategy is specified. Parameters: obj - the object to add true if the collection was modified throws: UnsupportedOperationException - if CollectionMutator hasn't been set throws: UnsupportedOperationException - if add is unsupported throws: ClassCastException - if the object cannot be added due to its type throws: NullPointerException - if the object cannot be added because its null throws: IllegalArgumentException - if the object cannot be added

addAll
public boolean addAll(Collection coll)(Code)
	Adds a collection of elements to this collection, throwing UnsupportedOperationException unless a CollectionMutator strategy is specified. Parameters: coll - the collection to add true if the collection was modified throws: UnsupportedOperationException - if CollectionMutator hasn't been set throws: UnsupportedOperationException - if add is unsupported throws: ClassCastException - if the object cannot be added due to its type throws: NullPointerException - if the object cannot be added because its null throws: IllegalArgumentException - if the object cannot be added

addComposited
public void addComposited(Collection[] comps)(Code)
	Add these Collections to the list of collections in this composite Parameters: comps - Collections to be appended to the composite

addComposited
public void addComposited(Collection c)(Code)
	Add an additional collection to this composite. Parameters: c - the collection to add

addComposited
public void addComposited(Collection c, Collection d)(Code)
	Add two additional collections to this composite. Parameters: c - the first collection to add Parameters: d - the second collection to add

clear
public void clear()(Code)
	Removes all of the elements from this collection . This implementation calls `clear()` on each collection. throws: UnsupportedOperationException - if clear is unsupported

contains
public boolean contains(Object obj)(Code)
	Checks whether this composite collection contains the object. This implementation calls `contains()` on each collection. Parameters: obj - the object to search for true if obj is contained in any of the contained collections

containsAll
public boolean containsAll(Collection coll)(Code)
	Checks whether this composite contains all the elements in the specified collection. This implementation calls `contains()` for each element in the specified collection. Parameters: coll - the collection to check for true if all elements contained

getCollections
public Collection getCollections()(Code)
	Gets the collections being decorated. Unmodifiable collection of all collections in this composite.

isEmpty
public boolean isEmpty()(Code)
	Checks whether this composite collection is empty. This implementation calls `isEmpty()` on each collection. true if all of the contained collections are empty

iterator
public Iterator iterator()(Code)
	Gets an iterator over all the collections in this composite. This implementation uses an `IteratorChain`. an `IteratorChain` instance which supports`remove()`. Iteration occurs over containedcollections in the order they were added, but this behaviorshould not be relied upon. See Also: IteratorChain

remove
public boolean remove(Object obj)(Code)
	Removes an object from the collection, throwing UnsupportedOperationException unless a CollectionMutator strategy is specified. Parameters: obj - the object being removed true if the collection is changed throws: UnsupportedOperationException - if removed is unsupported throws: ClassCastException - if the object cannot be removed due to its type throws: NullPointerException - if the object cannot be removed because its null throws: IllegalArgumentException - if the object cannot be removed

removeAll
public boolean removeAll(Collection coll)(Code)
	Removes the elements in the specified collection from this composite collection. This implementation calls `removeAll` on each collection. Parameters: coll - the collection to remove true if the collection was modified throws: UnsupportedOperationException - if removeAll is unsupported

removeComposited
public void removeComposited(Collection coll)(Code)
	Removes a collection from the those being decorated in this composite. Parameters: coll - collection to be removed

retainAll
public boolean retainAll(Collection coll)(Code)
	Retains all the elements in the specified collection in this composite collection, removing all others. This implementation calls `retainAll()` on each collection. Parameters: coll - the collection to remove true if the collection was modified throws: UnsupportedOperationException - if retainAll is unsupported

setMutator
public void setMutator(CollectionMutator mutator)(Code)
	Specify a CollectionMutator strategy instance to handle changes. Parameters: mutator - the mutator to use

size
public int size()(Code)
	Gets the size of this composite collection. This implementation calls `size()` on each collection. total number of elements in all contained containers

toArray
public Object[] toArray()(Code)
	Returns an array containing all of the elements in this composite. an object array of all the elements in the collection

toArray
public Object[] toArray(Object[] array)(Code)
	Returns an object array, populating the supplied array if possible. See `Collection` interface for full details. Parameters: array - the array to use, populating if possible an array of all the elements in the collection

toCollection
public Collection toCollection()(Code)
	Returns a new collection containing all of the elements A new ArrayList containing all of the elements in this composite.The new collection is not backed by this composite.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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