package ie.dcu.plugin;

import java.io.File;
import java.net.URLClassLoader;
import java.util.Map;

public class Plugin {
	private final File root;
	private final Map<String, String> metadata;
	private final URLClassLoader loader;

	Plugin(File root, Map<String, String> metadata, URLClassLoader loader) {
		this.root = root;
		this.metadata = metadata;
		this.loader = loader;
	}
	
	public String getName() {
		return getMetadata("name");
	}
	
	public Map<String, String> getMetadata() {
		return metadata;
	}
	
	public String getMetadata(String key) {
		return metadata.get(key);
	}
	
	public File getRootFolder() {
		return root;
	}
	
	public File getResource(String name) {
		return new File(root, name);
	}
	
	public Class<?> loadClass(String name) throws ClassNotFoundException {
		return loader.loadClass(name);
	}
	
	public Object loadObject(String name) 
		throws PluginException 
	{
		try {
			Class<?> clazz = loadClass(name);
			Object instance = clazz.newInstance();
			return instance;
		} catch (ClassNotFoundException e) {
			throw new PluginException(e);
		} catch (InstantiationException e) {
			throw new PluginException(e);
		} catch (IllegalAccessException e) {
			throw new PluginException(e);
		}
	}
}