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Java example source code file (StubFactoryFactoryStaticImpl.java)

This example Java source code file (StubFactoryFactoryStaticImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

class, classloader, classnotfoundexception, corba, could, exception, illegalstateexception, orbutilsystemexception, rmi, string, stubfactoryfactorybase, stubfactoryfactorystaticimpl, stubfactorystaticimpl, tie

The StubFactoryFactoryStaticImpl.java Java example source code

/*
 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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 ;
    }
}

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