view test/runtime/6626217/Loader2.java @ 4155:394404b2d9bd

Removed strict requirement for GRAAL environment variable. It only needs to be set now if the graal directory is not in the directory hierarchy of GraalVM JDK.
author Doug Simon <doug.simon@oracle.com>
date Wed, 21 Dec 2011 11:25:27 +0100
parents 495caa35b1b5
children
line wrap: on
line source

import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
public class Loader2 extends ClassLoader {
  int _recur;
  public void print( String msg ) {
    for( int i=0; i<_recur; i++ )
      System.out.print("  ");
    System.out.println(">>Loader2>> "+msg);
  }

  protected Class findClass2(String name) throws ClassNotFoundException {
    print("Fetching the implementation of "+name);
    int old = _recur;
    try {
      FileInputStream fi = new FileInputStream(name+".impl2");
      byte result[] = new byte[fi.available()];
      fi.read(result);

      print("DefineClass1 on "+name);
      _recur++;
      Class clazz = defineClass(name, result, 0, result.length);
      _recur = old;
      print("Returning newly loaded class.");
      return clazz;
    } catch (Exception e) {
      _recur = old;
      print("Not found on disk.");
      // If we caught an exception, either the class was not found or
      // it was unreadable by our process.
      return null;
      //throw new ClassNotFoundException(e.toString());
    }
  }

  protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException  {
    // Attempt a disk load first
    Class c = findClass2(name);
    if( c == null ) {
      // check if the class has already been loaded
      print("Checking for prior loaded class "+name);
      c = findLoadedClass(name);
      print("Letting super-loader load "+name);
      int old = _recur;
      _recur++;
      c = super.loadClass(name, false);
      _recur=old;
    }
    if (resolve) { print("Resolving class "+name); resolveClass(c); }
    print("Returning clazz "+c.getClassLoader()+":"+name);
    return c;
  }
}