/*
 *
 * Copyright (c) 1998 Scott Oaks. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and
 * without fee is hereby granted.
 *
 * This sample source code is provided for example only,
 * on an unsupported, as-is basis. 
 *
 * AUTHOR MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. AUTHOR SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 *
 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  AUTHOR
 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
 * HIGH RISK ACTIVITIES.
 */


// This example is not a full class loader; it merely provides the
// outline of how a class is loaded
public class LoadClass extends ClassLoader {
	protected Class loadClass(String name, boolean resolve) {
		Class c;
		SecurityManager sm = System.getSecurityManager();

		// Step 1 -- Check for a previously loaded class
		c = findLoadedClass(name);
		if (c != null)
			return c;
				
		// Step 2 -- Check to make sure that we can access this class
		if (sm != null) {
			int i = name.lastIndexOf('.');
			if (i >= 0)
				sm.checkPackageAccess(name.substring(0, i));
		}

		// Step 3 -- Check for system class first
		try {
			c = findSystemClass(name);
			return c;
		} catch (ClassNotFoundException cnfe) {
			// Not a system class, simply continue
		}

		// Step 4 -- Check to make sure that we can define this class
		if (sm != null) {
			int i = name.lastIndexOf('.');
			if (i >= 0)
				sm.checkPackageDefinition(name.substring(0, i));
		}

		// Step 5 -- Read in the class file
		byte data[] = lookupData(name);

		// Step 4 and 5 -- Define the class from the data; this also
		//		 passes the data through the byte code verifier
		c = defineClass(name, data, 0, data.length);

		// Step 6 -- Resolve the internal references of the class
		if (resolve)
			resolveClass(c);

		return c;
	}

	byte [] lookupData(String n) {
		return new byte[1];
	}
}