DocearAddonController.java

package org.docear.plugin.pdfutilities.addons;

import java.io.File;
import java.util.HashSet;
import java.util.Set;

import net.xeoh.plugins.base.Plugin;
import net.xeoh.plugins.base.PluginManager;
import net.xeoh.plugins.base.impl.PluginManagerFactory;
import net.xeoh.plugins.base.options.addpluginsfrom.OptionReportAfter;

import org.freeplane.core.resources.ResourceController;

public class DocearAddonController {
	
	private static DocearAddonController controller;
	
	private PluginManager manager;
	private Set<Class<? extends Plugin>> plugins;
	
	public DocearAddonController(){
		String userDir = ResourceController.getResourceController().getFreeplaneUserDirectory();	
		File addonsDir = new File(userDir + File.separatorChar + "addons");	    
		manager = PluginManagerFactory.createPluginManager();		
		manager.addPluginsFrom(addonsDir.toURI(), new OptionReportAfter());
		plugins = new HashSet<Class<? extends Plugin>>();
	}
	
	public <P extends Plugin> P getAddon(final Class<P> requestedPlugin){
		return manager.getPlugin(requestedPlugin);
	}
	
	public boolean hasPlugin(final Class<? extends Plugin> requestedPlugin){
		if(plugins.contains(requestedPlugin)){
			return true;
		}
		else{
			if(manager.getPlugin(requestedPlugin) != null){
				plugins.add(requestedPlugin);
				return true;
			}
			else{
				return false;
			}
		}		
	}
	
	public static DocearAddonController getController(){
		if(controller == null){
			controller = new DocearAddonController();
		}
		return controller;
	}
	
}