gcc/libjava/java/lang/VMClassLoader.java

/*
 * java.lang.ClassLoader: part of the Java Class Libraries project.
 * Copyright (C) 1998, 2001 Free Software Foundation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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 java.lang;

/**
 * java.lang.VMClassLoader is a package-private helper for VMs to implement
 * on behalf of java.lang.ClassLoader.
 *
 * @author John Keiser
 * @version 1.1.0, Sep 22 1998
 * @since CP1.1
 */

class VMClassLoader {

    /** 
     * Helper to define a class using a string of bytes.
     * 
     * @param name the name to give the class.  null if unknown.
     * @param data the data representing the classfile, in classfile format.
     * @param offset the offset into the data where the classfile starts.
     * @param len the length of the classfile data in the array.
     * @return the class that was defined.
     * @exception ClassFormatError if the byte array is not in proper classfile format.
     */
  // Not yet needed for libgcj.
//      final static native Class defineClass(ClassLoader cl, String name, 
//  	     byte[] data, int offset, int len) throws ClassFormatError;
    
    /** 
     * Helper to resolve all references to other classes from this class.
     * @param c the class to resolve.
     */
  // Not yet needed for libgcj.
  //    final static native void resolveClass(Class c);

    /** 
     * Helper for java.lang.Integer, Byte, etc. to get the TYPE class
     * at initialization time.  If there are multiple classloaders, this
     * method may be called once per ClassLoader per type.
     *
     * @param type name of the primitive type; i.e. "int", "byte", etc.
     * @return a "bogus" class representing the primitive type.
     */
  static final Class getPrimitiveClass(String type)
  {
    if ("int".equals (type))
      return int.class;
    else if ("long".equals (type))
      return long.class;
    else if ("boolean".equals (type))
      return boolean.class;
    else if ("short".equals (type))
      return short.class;
    else if ("char".equals (type))
      return char.class;
    else if ("byte".equals (type))
      return byte.class;
    else if ("float".equals (type))
      return float.class;
    else if ("double".equals (type))
      return double.class;
    else if ("void".equals (type))
      return void.class;
    return null;
  }
}