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.amf.io.util.instantiator;
022    
023    import java.io.IOException;
024    import java.util.ArrayList;
025    import java.util.HashMap;
026    import java.util.List;
027    
028    import org.granite.messaging.amf.io.util.Property;
029    
030    /**
031     * @author Franck WOLFF
032     */
033    public abstract class AbstractInstantiator<T> extends HashMap<String, Object> {
034    
035            private static final long serialVersionUID = 1L;
036    
037            private final List<Referer> referers = new ArrayList<Referer>();
038    
039        protected AbstractInstantiator() {
040        }
041    
042        public abstract T newInstance() throws IOException, ClassNotFoundException, InstantiationException, IllegalAccessException;
043        public abstract List<String> getOrderedFieldNames();
044    
045        public void addReferer(Object referer, Property property) {
046            referers.add(new Referer(referer, property));
047        }
048    
049        public T resolve() throws IOException, ClassNotFoundException, InstantiationException, IllegalAccessException {
050            T object = newInstance();
051            if (object == null)
052                    throw new InstantiationException("Instantiator newInstance() method cannot return null");
053            for (Referer referer : referers)
054                referer.property.setProperty(referer.object, object);
055            return object;
056        }
057    
058        static class Referer {
059            final Object object;
060            final Property property;
061    
062            Referer(Object object, Property property) {
063                this.object = object;
064                this.property = property;
065            }
066        }
067    }