/*
 * @(#)StubFactoryFactoryStaticImpl.java	1.10 04/05/25
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package com.sun.corba.se.impl.presentation.rmi;

import javax.rmi.CORBA.Util;
import javax.rmi.CORBA.Tie ;

import org.omg.CORBA.CompletionStatus;

import com.sun.corba.se.spi.presentation.rmi.PresentationManager;

import com.sun.corba.se.impl.util.PackagePrefixChecker;
import com.sun.corba.se.impl.util.Utility;

import com.sun.corba.se.spi.logging.CORBALogDomains ;

import com.sun.corba.se.impl.logging.ORBUtilSystemException ;

public class StubFactoryFactoryStaticImpl extends 
    StubFactoryFactoryBase 
{
    private ORBUtilSystemException wrapper = ORBUtilSystemException.get( 
	CORBALogDomains.RPC_PRESENTATION ) ;

    public PresentationManager.StubFactory createStubFactory(
	String className, boolean isIDLStub, String remoteCodeBase, Class 
	expectedClass, ClassLoader classLoader)
    {
	String stubName = null ;

	if (isIDLStub) 
	    stubName = Utility.idlStubName( className ) ;
	else
	    stubName = Utility.stubNameForCompiler( className ) ;

	ClassLoader expectedTypeClassLoader = 
	    (expectedClass == null ? classLoader : 
	    expectedClass.getClassLoader());

	// The old code was optimized to try to guess which way to load classes
	// first.  The real stub class name could either be className or 
	// "org.omg.stub." + className.  We will compute this as follows:
	// If stubName starts with a "forbidden" package, try the prefixed
	// version first, otherwise try the non-prefixed version first.
	// In any case, try both forms if necessary.

	String firstStubName = stubName ;
	String secondStubName = stubName ;

	if (PackagePrefixChecker.hasOffendingPrefix(stubName))
	    firstStubName = PackagePrefixChecker.packagePrefix() + stubName ;
	else
	    secondStubName = PackagePrefixChecker.packagePrefix() + stubName ;

	Class clz = null;

	try {
	    clz = Util.loadClass( firstStubName, remoteCodeBase, 
		expectedTypeClassLoader ) ;
	} catch (ClassNotFoundException e1) {
	    // log only at FINE level
	    wrapper.classNotFound1( CompletionStatus.COMPLETED_MAYBE,
		e1, firstStubName ) ;
	    try {
		clz = Util.loadClass( secondStubName, remoteCodeBase, 
		    expectedTypeClassLoader ) ;
	    } catch (ClassNotFoundException e2) {
		throw wrapper.classNotFound2( 
		    CompletionStatus.COMPLETED_MAYBE, e2, secondStubName ) ;
	    }
	}

	// XXX Is this step necessary, or should the Util.loadClass
	// algorithm always produce a valid class if the setup is correct?
	// Does the OMG standard algorithm need to be changed to include
	// this step?
        if ((clz == null) || 
	    ((expectedClass != null) && !expectedClass.isAssignableFrom(clz))) {
	    try {
		ClassLoader cl = Thread.currentThread().getContextClassLoader();
		if (cl == null)
		    cl = ClassLoader.getSystemClassLoader();

		clz = cl.loadClass(className);
	    } catch (Exception exc) {
		// XXX make this a system exception
		IllegalStateException ise = new IllegalStateException( 
		    "Could not load class " + stubName ) ;
		ise.initCause( exc ) ;
		throw ise ;
	    }
        }

	return new StubFactoryStaticImpl( clz ) ;
    }

    public Tie getTie( Class cls )
    {
	Class tieClass = null ;
	String className = Utility.tieName(cls.getName());

	// XXX log exceptions at FINE level
	try {
	    try {
		//_REVISIT_ The spec does not specify a loadingContext parameter for
		//the following call.  Would it be useful to pass one?  
		tieClass = Utility.loadClassForClass(className, Util.getCodebase(cls), 
		    null, cls, cls.getClassLoader());
		return (Tie) tieClass.newInstance();
	    } catch (Exception err) {
		tieClass = Utility.loadClassForClass(
		    PackagePrefixChecker.packagePrefix() + className, 
		    Util.getCodebase(cls), null, cls, cls.getClassLoader());
		return (Tie) tieClass.newInstance();
	    }
        } catch (Exception err) {
            return null;    
        }

    }

    public boolean createsDynamicStubs() 
    {
	return false ;
    }
}