/*
* Created on 15-May-2008
* Copyright (C) 2008 by Andrea Vacondio.
*
* 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.
* 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.pdfsam.guiclient.business.thumbnails;
import java.util.ArrayList;
import java.util.List;
import java.util.ServiceLoader;
import org.pdfsam.guiclient.business.thumbnails.creators.ThumbnailsCreator;
import org.pdfsam.guiclient.dto.StringItem;
/**
* Registy of the installed ThumbnailCreators
* @author Andrea Vacondio
*
*/
public class ThumbnailCreatorsRegisty {
private static ServiceLoader<ThumbnailsCreator> CREATORS = ServiceLoader.load(ThumbnailsCreator.class);
/**
* @param identifier
* @return The requested {@link ThumbnailsCreator} or the first available of the requested one is not available. Returns null if no {@link ThumbnailsCreator} is available.
*/
public static ThumbnailsCreator getCreator(String identifier){
ThumbnailsCreator retVal = null;
if(CREATORS!=null && identifier!=null && identifier.length()>0){
for(ThumbnailsCreator creator: CREATORS){
if(identifier.equals(creator.getCreatorIdentifier())){
retVal = creator;
break;
}
}
}
//set the default one
if(retVal == null){
for(ThumbnailsCreator creator: CREATORS){
retVal = creator;
break;
}
}
return retVal;
}
/**
* @return a list of the available CREATORS
*/
public static List<StringItem> getInstalledCreators(){
List<StringItem> retVal = new ArrayList<StringItem>();
for(ThumbnailsCreator creator: CREATORS){
retVal.add(new StringItem(creator.getCreatorIdentifier(), creator.getCreatorName()));
}
return retVal;
}
/**
* Creates the services from the given class loader. Useful when new jars/classes are loaded at runtime
*/
public static void reload(ClassLoader cl) {
CREATORS = ServiceLoader.load(ThumbnailsCreator.class, cl);
}
}