hal/src/zutil/plugin/PluginData.java

/*******************************************************************************
 * Copyright (c) 2014 Ziver
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ******************************************************************************/

package zutil.plugin;

import zutil.ClassUtil;
import zutil.log.LogUtil;
import zutil.parser.DataNode;

import javax.xml.crypto.Data;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.logging.Logger;

/**
 * This class contains information about a plugin
 * and implementation instances of the plugin interfaces
 *  
 * @author Ziver
 */
public class PluginData {
	private static Logger log = LogUtil.getLogger();

	private double pluginVersion;
	private String pluginName;
	private HashMap<Class, Class>  classMap;
	private HashMap<Class, Object> objectMap;

	
	protected PluginData(DataNode data) throws ClassNotFoundException, MalformedURLException {
		classMap  = new HashMap<Class, Class>();
		objectMap = new HashMap<Class, Object>();

		pluginVersion = data.getDouble("version");
		pluginName = data.getString("name");
		log.fine("Found plugin: "+pluginName);

		DataNode node = data.get("interfaces");
		Iterator<String> intfIt = node.keyIterator();
		while (intfIt.hasNext()) {
			String intf = intfIt.next();
			log.finer("Plugin interface: "+ intf+"-->"+node.get(intf).getString());
			classMap.put(
					getClassByName(intf),
					getClassByName(node.get(intf).getString()));
		}
	}

	private static Class getClassByName(String name) throws ClassNotFoundException, MalformedURLException {
		return Class.forName(name);
	}
	
	public double getVersion(){
		return pluginVersion;
	}
	public String getName(){
		return pluginName;
	}

	public <T> T getObject(Class<T> intf) {
		if(classMap.containsKey(intf)) {
			try {
				Class subClass = classMap.get(intf);
				if (objectMap.containsKey(subClass))
					objectMap.put(intf, subClass.newInstance());
				return (T) objectMap.get(subClass);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return null;
	}


	public boolean contains(Class<?> intf){
		return classMap.containsKey(intf);
	}
}