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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
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 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 * file and include the License file at packager/legal/LICENSE.txt.
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// Portions Copyright [2016-2017] [Payara Foundation and/or its affiliates]

package com.sun.ejb.base.io;

import com.sun.enterprise.container.common.spi.util.SerializableObjectFactory;
import com.sun.enterprise.container.common.spi.util.GlassFishInputStreamHandler;

import com.sun.logging.LogDomains;

import java.io.*;
import java.rmi.Remote;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.glassfish.enterprise.iiop.api.GlassFishORBHelper;
import org.glassfish.enterprise.iiop.api.ProtocolManager;
import org.glassfish.internal.api.Globals;

/**
 * A class that is used to restore SFSB conversational state
 *
 * @author Mahesh Kannan
 */
public class EJBObjectInputStreamHandler
	implements GlassFishInputStreamHandler
{
    private static final Logger _ejbLogger =
       LogDomains.getLogger(EJBObjectInputStreamHandler.class, LogDomains.EJB_LOGGER);

    @Override
    public Object resolveObject(Object obj)
        throws IOException
    {

	// Until we've identified a remote object, we can't assume the orb is
	// available in the container.  If the orb is not present, this will be null.
        ProtocolManager protocolMgr = getProtocolManager();

        try {
            if ( (protocolMgr != null) && protocolMgr.isStub(obj) ) {
                protocolMgr.connectObject((Remote)obj);
                return obj;
            } else if (obj instanceof SerializableObjectFactory) {
                return ((SerializableObjectFactory) obj).createObject(0L);
            } else {
                return obj;
            }
        } catch (IOException ioEx ) {
            _ejbLogger.log(Level.SEVERE, "ejb.resolve_object_exception", ioEx);
            throw ioEx;
        } catch (Exception ex) {
            _ejbLogger.log(Level.SEVERE, "ejb.resolve_object_exception", ex);
            IOException ioe = new IOException();
            ioe.initCause(ex);
            throw ioe;
        }
    }

    /**
     * Do all ProtocolManager access lazily and only request orb if it has already been
     * initialized so that code doesn't make the assumption that an orb is available in
     * this runtime.
     */
    private ProtocolManager getProtocolManager() {
	GlassFishORBHelper orbHelper = Globals.getDefaultHabitat().getService(GlassFishORBHelper.class);
	return orbHelper.isORBInitialized() ? orbHelper.getProtocolManager() : null;
    }
}