// Modifier.java - Process modifier values.

/* 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.  */

/**
 * @author Tom Tromey <tromey@cygnus.com>
 * @date October 1, 1998
 */

/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
 * "The Java Language Specification", ISBN 0-201-63451-1
 * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
 * Status: Believed complete and correct to version 1.1
 */

package java.lang.reflect;

public class Modifier
{
  public static final int PUBLIC    = 0x001;
  public static final int PRIVATE   = 0x002;
  public static final int PROTECTED = 0x004;
  public static final int STATIC    = 0x008;
  public static final int FINAL     = 0x010;
  public static final int SYNCHRONIZED = 0x020;
  public static final int VOLATILE  = 0x040;
  public static final int TRANSIENT = 0x080;
  public static final int NATIVE    = 0x100;
  public static final int INTERFACE = 0x200;
  public static final int ABSTRACT  = 0x400;

  // This is only used by the C++ code, so it is not public.
  static final int ALL_FLAGS = 0x7ff;

  public static boolean isAbstract (int mod)
  {
    return (mod & ABSTRACT) != 0;
  }

  public static boolean isFinal (int mod)
  {
    return (mod & FINAL) != 0;
  }

  public static boolean isInterface (int mod)
  {
    return (mod & INTERFACE) != 0;
  }

  public static boolean isNative (int mod)
  {
    return (mod & NATIVE) != 0;
  }

  public static boolean isPrivate (int mod)
  {
    return (mod & PRIVATE) != 0;
  }

  public static boolean isProtected (int mod)
  {
    return (mod & PROTECTED) != 0;
  }

  public static boolean isPublic (int mod)
  {
    return (mod & PUBLIC) != 0;
  }

  public static boolean isStatic (int mod)
  {
    return (mod & STATIC) != 0;
  }

  public static boolean isSynchronized (int mod)
  {
    return (mod & SYNCHRONIZED) != 0;
  }

  public static boolean isTransient (int mod)
  {
    return (mod & TRANSIENT) != 0;
  }

  public static boolean isVolatile (int mod)
  {
    return (mod & VOLATILE) != 0;
  }

  public static String toString (int mod)
  {
    StringBuffer r = new StringBuffer ();
    toString(mod, r);
    return r.toString();
  }

  static void toString (int mod, StringBuffer r)
  {
    if (isPublic (mod))
      r.append("public ");
    if (isProtected (mod))
      r.append("protected ");
    if (isPrivate (mod))
      r.append("private ");
    if (isAbstract (mod))
      r.append("abstract ");
    if (isStatic (mod))
      r.append("static ");
    if (isFinal (mod))
      r.append("final ");
    if (isTransient (mod))
      r.append("transient ");
    if (isVolatile (mod))
      r.append("volatile ");
    if (isNative (mod))
      r.append("native ");
    if (isSynchronized (mod))
      r.append("synchronized ");
    if (isInterface (mod))
      r.append("interface ");

    // Trim trailing space.
    int l = r.length();
    if (l > 0)
      r.setLength(l - 1);
  }
}
