001    /**
002     *   GRANITE DATA SERVICES
003     *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004     *
005     *   This file is part of Granite Data Services.
006     *
007     *   Granite Data Services is free software; you can redistribute it and/or modify
008     *   it under the terms of the GNU Library General Public License as published by
009     *   the Free Software Foundation; either version 2 of the License, or (at your
010     *   option) any later version.
011     *
012     *   Granite Data Services is distributed in the hope that it will be useful, but
013     *   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014     *   FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015     *   for more details.
016     *
017     *   You should have received a copy of the GNU Library General Public License
018     *   along with this library; if not, see <http://www.gnu.org/licenses/>.
019     */
020    package org.granite.client.persistence.collection;
021    
022    import java.io.ObjectInput;
023    import java.util.Collection;
024    import java.util.HashSet;
025    import java.util.Set;
026    import java.util.SortedSet;
027    
028    import org.granite.messaging.persistence.PersistentCollectionSnapshot;
029    
030    /**
031     * @author Franck WOLFF
032     */
033    public class PersistentSet<E> extends AbstractPersistentSimpleCollection<E, Set<E>> implements Set<E> {
034    
035            public PersistentSet() {
036            }
037    
038            public PersistentSet(boolean initialized) {
039                    this(initialized ? new HashSet<E>() : null, false);
040            }
041    
042            public PersistentSet(Set<E> collection) {         
043                    this(collection, true);
044            }
045    
046            public PersistentSet(Set<E> collection, boolean clone) {          
047                    if (collection instanceof SortedSet)
048                            throw new IllegalArgumentException("Should not be a SortedSet: " + collection);
049                    
050                    if (collection != null)
051                            init(clone ? new HashSet<E>(collection) : collection, null, false);
052            }
053            
054            @Override
055            public void doInitialize() {
056                    init(new HashSet<E>(), null, false);
057            }
058    
059            @SuppressWarnings("unchecked")
060            @Override
061            protected void updateFromSnapshot(ObjectInput in, PersistentCollectionSnapshot snapshot) {
062                    if (snapshot.isInitialized())
063                            init(new HashSet<E>((Collection<? extends E>)snapshot.getElementsAsCollection()), snapshot.getDetachedState(), snapshot.isDirty());
064                    else
065                            init(null, snapshot.getDetachedState(), false);
066            }
067            
068        public PersistentSet<E> clone(boolean uninitialize) {
069            PersistentSet<E> set = new PersistentSet<E>();
070            if (wasInitialized() && !uninitialize)
071                    set.init(getCollection(), null, isDirty());
072            return set; 
073        }
074    }