aoqi@0: import java.io.ByteArrayInputStream;
aoqi@0: import java.io.FileInputStream;
aoqi@0: public class Loader2 extends ClassLoader {
aoqi@0:   int _recur;
aoqi@0:   public void print( String msg ) {
aoqi@0:     for( int i=0; i<_recur; i++ )
aoqi@0:       System.out.print("  ");
aoqi@0:     System.out.println(">>Loader2>> "+msg);
aoqi@0:   }
aoqi@0: 
aoqi@0:   protected Class findClass2(String name) throws ClassNotFoundException {
aoqi@0:     print("Fetching the implementation of "+name);
aoqi@0:     int old = _recur;
aoqi@0:     try {
aoqi@0:       FileInputStream fi = new FileInputStream(name+".impl2");
aoqi@0:       byte result[] = new byte[fi.available()];
aoqi@0:       fi.read(result);
aoqi@0: 
aoqi@0:       print("DefineClass1 on "+name);
aoqi@0:       _recur++;
aoqi@0:       Class clazz = defineClass(name, result, 0, result.length);
aoqi@0:       _recur = old;
aoqi@0:       print("Returning newly loaded class.");
aoqi@0:       return clazz;
aoqi@0:     } catch (Exception e) {
aoqi@0:       _recur = old;
aoqi@0:       print("Not found on disk.");
aoqi@0:       // If we caught an exception, either the class was not found or
aoqi@0:       // it was unreadable by our process.
aoqi@0:       return null;
aoqi@0:       //throw new ClassNotFoundException(e.toString());
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException  {
aoqi@0:     // Attempt a disk load first
aoqi@0:     Class c = findClass2(name);
aoqi@0:     if( c == null ) {
aoqi@0:       // check if the class has already been loaded
aoqi@0:       print("Checking for prior loaded class "+name);
aoqi@0:       c = findLoadedClass(name);
aoqi@0:       print("Letting super-loader load "+name);
aoqi@0:       int old = _recur;
aoqi@0:       _recur++;
aoqi@0:       c = super.loadClass(name, false);
aoqi@0:       _recur=old;
aoqi@0:     }
aoqi@0:     if (resolve) { print("Resolving class "+name); resolveClass(c); }
aoqi@0:     print("Returning clazz "+c.getClassLoader()+":"+name);
aoqi@0:     return c;
aoqi@0:   }
aoqi@0: }