/* 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.  */

// SecurityManager

package java.lang;

/**
 * @author Anthony Green <green@cygnus.com>
 * @date October 5, 1998.  
 */

/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
 */

import java.io.*;
import java.net.*;

public abstract class SecurityManager
{
  protected boolean inCheck = false;

  public void checkAccept (String host, int port)
    {
      throw new SecurityException();
    }

  public void checkAccess (Thread thrd)
    {
      throw new SecurityException();
    }

  public void checkAccess (ThreadGroup thrdGroup)
    {
      throw new SecurityException();
    }

  public void checkAwtEventQueueAccess ()
    {
      throw new SecurityException();
    }

  public void checkConnect (String host, int prt)
    {
      throw new SecurityException();
    }

  public void checkConnect (String host, int prt, Object ctx)
    {
      throw new SecurityException();
    }

  public void checkCreateClassLoader ()
    {
      throw new SecurityException();
    }

  public void checkDelete (String fileName)
    {
      throw new SecurityException();
    }

  public void checkExec (String prog)
    {
      throw new SecurityException();
    }

  public void checkExit (int stat)
    {
      throw new SecurityException();
    }

  public void checkLink (String lib)
    {
      throw new SecurityException();
    }

  public void checkListen (int lport)
    {
      throw new SecurityException();
    }

  public void checkMemberAccess (Class cl, int mtype)
    {
      throw new SecurityException();
    }

  public void checkMulticast (InetAddress maddr)
    {
      throw new SecurityException();
    }

  public void checkMulticast (InetAddress maddr, byte ttl)
    {
      throw new SecurityException();
    }

  public void checkPackageAccess (String pkg)
    {
      throw new SecurityException();
    }

  public void checkPackageDefinition (String pkg)
    {
      throw new SecurityException();
    }

  public void checkPrintJobAccess ()
    {
      throw new SecurityException();
    }

  public void checkPropertiesAccess ()
    {
      throw new SecurityException();
    }

  public void checkPropertyAccess (String prop)
    {
      throw new SecurityException();
    }

  public void checkPropertyAccess (String prop, String defval)
    {
      throw new SecurityException();
    }

  public void checkRead (FileDescriptor fd)
    {
      throw new SecurityException();
    }

  public void checkRead (String fileName)
    {
      throw new SecurityException();
    }

  public void checkRead (String fileName, Object ctx)
    {
      throw new SecurityException();
    }

  public void checkSecurityAccess (String action)
    {
      throw new SecurityException();
    }

  public void checkSetFactory ()
    {
      throw new SecurityException();
    }

  public void checkSystemClipboardAccess ()
    {
      throw new SecurityException();
    }

  public boolean checkTopLevelWindow (Object window)
    {
      throw new SecurityException();
    }

  public void checkWrite (FileDescriptor fd)
    {
      throw new SecurityException();
    }

  public void checkWrite (String fileName)
    {
      throw new SecurityException();
    }

  // Note: this method is deprecated in JDK 1.2
  protected /* native */ int classDepth (String className)
    {
      Class[] classStack = getClassContext ();
      for (int i = 0; i < classStack.length; i++)
	if (classStack[i].getName().compareTo(className) == 0)
	  return i;

      return -1;
    }

  // Note: this method is deprecated in JDK 1.2
  protected /* native */ int classLoaderDepth ()
    {
      Class[] classStack = getClassContext ();
      for (int i = 0; i < classStack.length; i++)
	if (classStack[i].getClassLoader() != null)
	  return i;

      return -1;
    }

  protected /* native */ ClassLoader currentClassLoader ()
    {
      Class[] classStack = getClassContext ();
      for (int i = 0; i < classStack.length; i++)
	{
	  ClassLoader loader = classStack[i].getClassLoader();
	  if (loader != null)
	    return loader;
	}

      return null;
    }

  protected /* native */ Class currentLoadedClass ()
    {
      Class[] classStack = getClassContext ();
      for (int i = 0; i < classStack.length; i++)
	{
	  ClassLoader loader = classStack[i].getClassLoader();
	  if (loader != null)
	    return classStack[i];
	}
      
      return null;
    }

  protected /* native */ Class[] getClassContext ()
    {
      return new Class[0];
    }

  // Note: this method is deprecated in JDK 1.2
  public boolean getInCheck ()
    {
      return inCheck;
    }

  public Object getSecurityContext ()
    {
      // FIXME: This has yet to be implemented.
      return new String("");
    }

  public ThreadGroup getThreadGroup ()
    {
      return Thread.currentThread().getThreadGroup();
    }

  protected boolean inClass (String className)
    {
      return (classDepth (className) != -1);
    }

  protected boolean inClassLoader ()
    {
      return (classLoaderDepth () != -1);
    }

  protected SecurityManager ()
    {
      if (System.getSecurityManager () != null)
	throw new SecurityException ();
    }
}