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// This was adapted from http://blog.snippetparty.com/2009/05/simple-dynamic-loadingunloading-of-code-in-java/ by Hugh Perkins 2009
// You can use and distribute it under public domain or GPLv2, or GPLv3, at your choice.
package hughai.loader.utils;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import com.springrts.ai.oo.OOAI;
public class Loader {
// from http://blog.snippetparty.com/2009/05/simple-dynamic-loadingunloading-of-code-in-java/, by Sune
// Note that if the class to be loaded is already available
// on the classpath, THEN IT WILL BE LOADED BY THE SYSTEMLOADER
// instead of this, and dynamic loading will fail
public static IHughAI loadOOAI( URL[] locations, String name) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
TransLoadStorage.getInstance(); // load transstorage instance / class.
ClassLoader baseClassLoader = Loader.class.getClassLoader();
if( baseClassLoader == null ) {
System.out.println("using system classloader as base");
baseClassLoader = ClassLoader.getSystemClassLoader();
} else {
System.out.println("using our classloader as base");
}
URLClassLoader newclassloader = new URLClassLoader(
locations, baseClassLoader );
Class<?> cls = newclassloader.loadClass(name);
System.out.println("loaded class.");
System.out.println("loaded class: " + cls.getName());
if (!IHughAI.class.isAssignableFrom(cls)) {
throw new RuntimeException("Invalid class");
}
Object newInstance = cls.newInstance();
System.out.println("Got object instance.");
System.out.println("Got object instance: " + newInstance.getClass().getName());
IHughAI ooai = (IHughAI)newInstance;
System.out.println("Cast instance ok.");
return ooai;
}
}
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