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// ClassLoader.java - Define policies for loading Java classes.
/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.lang;
import java.io.InputStream;
import java.util.Hashtable;
/**
* @author Tom Tromey <tromey@cygnus.com>
* @date October 28, 1998
*/
/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
* Status: Just a stub; not useful at all.
*/
public abstract class ClassLoader
{
protected ClassLoader ()
{
cache = new Hashtable ();
}
protected final Class defineClass (String className, byte[] bytecode,
int offset, int length)
{
throw new ClassFormatError ("defineClass unimplemented");
}
protected final Class defineClass (byte[] bytecodes,
int offset, int length)
{
return defineClass (null, bytecodes, offset, length);
}
protected final Class findLoadedClass (String className)
{
return (Class) cache.get(className);
}
protected final Class findSystemClass (String className)
throws ClassNotFoundException
{
Class c = system.findLoadedClass(className);
system.resolveClass(c);
return c;
}
// FIXME: Needs URL.
// public URL getResource (String resName);
public InputStream getResourceAsStream (String resName)
{
return null;
}
// FIXME: Needs URL.
// public static final URL getSystemResource (String resName);
public static final InputStream getSystemResourceAsStream (String resName)
{
return null;
}
protected abstract Class loadClass (String className, boolean resolve)
throws ClassNotFoundException;
public Class loadClass (String name) throws ClassNotFoundException
{
return loadClass (name, true);
}
protected final void resolveClass (Class c)
{
// Nothing for now.
}
protected final void setSigners (Class cl, Object[] signers)
{
// Nothing for now.
}
// Class cache.
private Hashtable cache;
// The system class loader. FIXME: should have an actual value
private static final ClassLoader system = null;
}
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