/*  Copyright (C) 2003-2011 JabRef contributors.
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package net.sf.jabref.gui;

import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import net.sf.jabref.BibtexEntry;
import net.sf.jabref.DatabaseChangeEvent;
import net.sf.jabref.DatabaseChangeListener;
import net.sf.jabref.IdComparator;
import ca.odell.glazedlists.BasicEventList;
import ca.odell.glazedlists.EventList;

public class GlazedEntrySorter implements DatabaseChangeListener {

	EventList<BibtexEntry> list;

    String[] idArray;
    BibtexEntry[] entryArray;
    
    public GlazedEntrySorter(Map<String, BibtexEntry> entries) {
        list = new BasicEventList<BibtexEntry>();
        list.getReadWriteLock().writeLock().lock();
        Set<String> keySet = entries.keySet();
        if (keySet != null) {
            Iterator<String> i = keySet.iterator();
            while (i.hasNext()) {
                list.add(entries.get(i.next()));
            }
        }

        // Sort the list so it is ordered according to creation (or read) order
        // when the table is unsorted.
        Collections.sort(list, new IdComparator());
        
        list.getReadWriteLock().writeLock().unlock();

    }

    public EventList<BibtexEntry> getTheList() {
        return list;
    }

    public void databaseChanged(DatabaseChangeEvent e) {
        list.getReadWriteLock().writeLock().lock();
        if (e.getType() == DatabaseChangeEvent.ChangeType.ADDED_ENTRY) {
            list.add(e.getEntry());
        } else if (e.getType() == DatabaseChangeEvent.ChangeType.REMOVED_ENTRY) {
            list.remove(e.getEntry());
        } else if (e.getType() == DatabaseChangeEvent.ChangeType.CHANGED_ENTRY) {
            int index = list.indexOf(e.getEntry());
            if (index != -1) {
            	// SpecialFieldUtils.syncSpecialFieldsFromKeywords update an entry during
            	// DatabaseChangeEvent.ADDED_ENTRY
            	// thus, 
            	list.set(index, e.getEntry());
            }
        }
        list.getReadWriteLock().writeLock().unlock();

    }


}