/*
 * Copyright (c) 1997, 2019 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package org.glassfish.pfl.dynamic.codegen.impl ;

import org.glassfish.pfl.basic.reflection.Bridge;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;

Class used to get a class directly from code generated by
a runtime code generator.
The code generator extends this base class, and must implement
the getClassData method.
Most of this is independent of BCEL, but finalizeMethod is
specific to the BCEL framework.
/** Class used to get a class directly from code generated by
 * a runtime code generator.
 * The code generator extends this base class, and must implement
 * the getClassData method.
 * Most of this is independent of BCEL, but finalizeMethod is
 * specific to the BCEL framework.
 */
public class CodeGeneratorUtil {
	private static final Bridge BRIDGE_REF = AccessController.doPrivileged((PrivilegedAction<Bridge>) Bridge::get
  );
    
	private CodeGeneratorUtil() { }

  // Name that Java uses for constructor methods
  static final String CONSTRUCTOR_METHOD_NAME = "<init>" ;

  
Defines a class in a classloader.
Params:
name – the name of the class to define
def – the byte-code definition of the new class
pd – the protection domain
loader – the classloader in which to define the class
Returns:
a newly created class in the specified classloader
Deprecated:
as of Java 11, use #makeClass(String,byte[],Class)/**
   * Defines a class in a classloader.
   * @param name the name of the class to define
   * @param def the byte-code definition of the new class
   * @param pd the protection domain
   * @param loader the classloader in which to define the class
   * @return a newly created class in the specified classloader
   * @deprecated as of Java 11, use #makeClass(String,byte[],Class)
   */
  @Deprecated
  public static Class<?> makeClass( String name, byte[] def, ProtectionDomain pd, ClassLoader loader ) {
     	return BRIDGE_REF.defineClass(name, def, loader, pd);
   }

  
Defines a class in the same classloader as a specified "anchor" class
Params:
name – the name of the class to define
def – the byte-code definition of the new class
anchorClass – an existing class in the desired classloader
Returns:
a newly created class/**
   * Defines a class in the same classloader as a specified "anchor" class
   * @param name the name of the class to define
   * @param def the byte-code definition of the new class
   * @param anchorClass an existing class in the desired classloader
   * @return a newly created class
   */
  public static Class<?> makeClass(String name, byte[] def, Class<?> anchorClass) {
     	return BRIDGE_REF.defineClass(anchorClass, name, def);
   }
}