/****************************************************************************
* Copyright (C) 2013 ecsec GmbH.
* All rights reserved.
* Contact: ecsec GmbH (info@ecsec.de)
*
* This file is part of the Open eCard App.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License version 3.0 as published by the Free Software Foundation
* and appearing in the file LICENSE.GPL included in the packaging of
* this file. Please review the following information to ensure the
* GNU General Public License version 3.0 requirements will be met:
* http://www.gnu.org/copyleft/gpl.html.
*
* Other Usage
* Alternatively, this file may be used in accordance with the terms
* and conditions contained in a signed written agreement between
* you and ecsec GmbH.
*
***************************************************************************/
package org.openecard.addon;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @param <C>
* @author Dirk Petrautzki <petrautzki@hs-coburg.de>
*/
public class AbstractFactory <C extends LifecycleTrait> {
private static final Logger logger = LoggerFactory.getLogger(AbstractFactory.class);
private final String implClass;
private ClassLoader classLoader;
public AbstractFactory(String implClass, ClassLoader classLoader) {
this.implClass = implClass;
this.classLoader = classLoader;
}
protected C loadInstance(Context ctx, Class<C> clazz) throws ActionInitializationException {
try {
Class<?> classToLoad = classLoader.loadClass(implClass);
Class<? extends C> typedClass = classToLoad.asSubclass(clazz);
Constructor<? extends C> ctor = typedClass.getConstructor();
ctor.setAccessible(true);
C c = typedClass.cast(ctor.newInstance());
c.init(ctx);
return c;
} catch (InstantiationException e) {
logger.error("Given class could not be instantiated.", e);
throw new ActionInitializationException(e);
} catch (InvocationTargetException e) {
logger.error("Exception in nullary constructor of given class.", e);
throw new ActionInitializationException(e);
} catch (IllegalAccessException e) {
logger.error("The class or its nullary constructor is not accessible.", e);
throw new ActionInitializationException(e);
} catch (ClassNotFoundException e) {
logger.error("Given class could not be found.", e);
throw new ActionInitializationException(e);
} catch (ClassCastException e) {
logger.error("Given class does not extend FactoryBaseType.", e);
throw new ActionInitializationException(e);
} catch (NoSuchMethodException e) {
logger.error("Default constructor does not exist in action implementation.", e);
throw new ActionInitializationException(e);
}
}
}