/*******************************************************************************
* Copyright (c) MOBAC developers
*
* 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, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package mobac.mapsources.loader;
import java.net.URL;
import java.net.URLClassLoader;
/**
* Loads all available classes from the map source packages and everything else from the <code>fallback</code>
* {@link ClassLoader}. Therefore in difference to the standard parent {@link ClassLoader} concept this implementation
* first tries to load the and then asks the fallback whereas usually it is the opposite (first try to load via parent
* and only if that fails try to do it self).
*/
public class MapPackClassLoader extends URLClassLoader {
private final ClassLoader fallback;
public MapPackClassLoader(URL url, ClassLoader fallback) {
this(new URL[] { url }, fallback);
}
protected MapPackClassLoader(URL[] urls, ClassLoader fallback) {
super(urls, null);
this.fallback = fallback;
}
@Override
protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
try {
return super.loadClass(name, resolve);
} catch (ClassNotFoundException e) {
return fallback.loadClass(name);
}
}
}