001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2011 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    
021    package org.granite.messaging.persistence;
022    
023    import java.lang.reflect.ParameterizedType;
024    import java.lang.reflect.Type;
025    import java.util.Comparator;
026    import java.util.HashSet;
027    import java.util.Set;
028    import java.util.SortedSet;
029    import java.util.TreeSet;
030    
031    import org.granite.config.GraniteConfig;
032    import org.granite.context.GraniteContext;
033    import org.granite.messaging.amf.io.convert.Converters;
034    import org.granite.util.ClassUtil;
035    
036    /**
037     * @author Franck WOLFF
038     */
039    public class ExternalizablePersistentSet extends AbstractExternalizablePersistentCollection {
040    
041        private static final long serialVersionUID = 1L;
042    
043        public ExternalizablePersistentSet() {
044        }
045        
046            public ExternalizablePersistentSet(Set<?> content, boolean initialized, boolean dirty) {
047                    super(null, initialized, dirty);
048                    setContentFromSet(content);
049            }
050        
051            public ExternalizablePersistentSet(Object[] content, boolean initialized, boolean dirty) {
052                    super(content, initialized, dirty);
053            }
054    
055            public Set<?> getContentAsSet(Type target) {
056                    return getContentAsSet(target, null);
057            }
058            
059            @SuppressWarnings({ "unchecked", "rawtypes" })
060            public Set<?> getContentAsSet(Type target, Comparator comparator) {
061            Set set = null;
062            if (content != null) {
063                    if (SortedSet.class.isAssignableFrom(ClassUtil.classOfType(target))) {
064                            if (comparator != null)
065                                    set = new TreeSet(comparator);
066                            else
067                                    set = new TreeSet();
068                    }
069                    else
070                            set = new HashSet(content.length);
071    
072                GraniteConfig config = GraniteContext.getCurrentInstance().getGraniteConfig();
073                Converters converters = config.getConverters();
074                            Type[] typeArguments = null;
075                            if (target instanceof ParameterizedType)
076                                    typeArguments = ((ParameterizedType)target).getActualTypeArguments();
077                            
078                    for (Object o : content) {
079                            if (typeArguments != null)
080                                    set.add(converters.convert(o, typeArguments[0]));
081                            else
082                                    set.add(o);
083                    }
084            }
085                    return set;
086            }
087            
088            public void setContentFromSet(Set<?> set) {
089                    content = (set != null ? set.toArray() : null);
090            }
091    }