StubFactoryFactoryStaticImpl.java

/*
 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.jboss.com.sun.corba.se.impl.presentation.rmi;

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

import org.omg.CORBA.CompletionStatus;

import org.jboss.com.sun.corba.se.impl.logging.ORBUtilSystemException;
import org.jboss.com.sun.corba.se.impl.presentation.rmi.StubFactoryFactoryBase;
import org.jboss.com.sun.corba.se.impl.util.PackagePrefixChecker;
import org.jboss.com.sun.corba.se.impl.util.Utility;
import org.jboss.com.sun.corba.se.spi.logging.CORBALogDomains;
import org.jboss.com.sun.corba.se.spi.presentation.rmi.PresentationManager;

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;
    }
}