/*
JVM-Bridge -- bridge from FP languages and others to the Java VM
Copyright (C) 2001 Ashley Yakeley <ashley@semantic.org>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

package	org.semantic.jvmbridge;
import	java.io.InputStream;
import	java.io.ByteArrayInputStream;

public abstract class ResourceLoader
extends ClassLoader
	{
	public abstract byte[] getResourceAsBytes(String resourceName);
	
	public InputStream getResourceAsStream(String resourceName)
		{
		return new ByteArrayInputStream(getResourceAsBytes(resourceName));
		}
	
	protected synchronized Class loadClass(String className,boolean resolve)
	 throws ClassNotFoundException
		{
		Class cl = findLoadedClass(className);
		if (cl == null)
			{
			try
				{
				return findSystemClass(className);
				}
			catch (ClassNotFoundException x)
				{
				byte[] resource = getResourceAsBytes(className + ".class");
				if (resource == null)
					throw new ClassNotFoundException(className);
				cl = defineClass(className,resource,0,resource.length);
				}
			}
		if (resolve)
			resolveClass(cl);
		return cl;
		}
	}