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
021package org.granite.messaging.amf.io.util.instantiator;
022
023import java.io.IOException;
024import java.util.ArrayList;
025import java.util.HashMap;
026import java.util.List;
027
028import org.granite.messaging.amf.io.util.Property;
029
030/**
031 * @author Franck WOLFF
032 */
033public 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}