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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * 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.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
// Portions Copyright [2016-2017] [Payara Foundation and/or its affiliates]

package com.sun.enterprise.container.common.impl.util;

import com.sun.enterprise.admin.util.ClassUtil;
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.lang.reflect.Modifier;
import java.lang.reflect.Proxy;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.glassfish.common.util.ObjectInputOutputStreamFactory;
import org.glassfish.common.util.ObjectInputOutputStreamFactoryFactory;

/**
 * A class that is used to restore conversational state
 *
 * @author Mahesh Kannan
 */
class GlassFishObjectInputStream extends ObjectInputStream
{
    private ClassLoader appLoader;
    private static Logger _logger = LogDomains.getLogger(GlassFishObjectInputStream.class, LogDomains.JNDI_LOGGER);
    private ObjectInputOutputStreamFactory inputStreamHelper;
    private Collection handlers;
    private final long uniqueId;

    GlassFishObjectInputStream(Collection handlers,  InputStream in, ClassLoader appCl, boolean resolve, long uniqueId)
        throws IOException, StreamCorruptedException
    {
        super(in);
        appLoader = appCl;
        this.handlers = handlers;
        this.uniqueId = uniqueId;

        if (resolve) {
            enableResolveObject(resolve);

        }

        inputStreamHelper = ObjectInputOutputStreamFactoryFactory.getFactory();
    }

    @Override
    protected Object resolveObject(Object obj)
        throws IOException
    {
    	Object result = obj;
        try {
            if (obj instanceof SerializableObjectFactory) {
                return ((SerializableObjectFactory) obj).createObject(uniqueId);
            } else {
            	for (GlassFishInputStreamHandler handler : handlers) {
					Object r = handler.resolveObject(obj);
					if (r != null) {
						result = r == GlassFishInputStreamHandler.NULL_OBJECT ? null : r;
						break;
					}
				}

            	return result;
            }
        } catch (IOException ioEx ) {
            _logger.log(Level.SEVERE, "Exception resolving object", ioEx);
            throw ioEx;
        } catch (Exception ex) {
            _logger.log(Level.SEVERE, "Exception resolving object", ex);
            IOException ioe = new IOException();
            ioe.initCause(ex);
            throw ioe;
        }
    }

    @Override
    protected Class resolveProxyClass(String[] interfaces)
        throws IOException, ClassNotFoundException
    {
        Class[] classObjs = new Class[interfaces.length];
        for (int i = 0; i < interfaces.length; i++) {
            Class cl = Class.forName(interfaces[i], false, appLoader);
            // If any non-public interfaces, delegate to JDK's
            // implementation of resolveProxyClass.
            if ((cl.getModifiers() & Modifier.PUBLIC) == 0) {
                return super.resolveProxyClass(interfaces);
            } else {
                classObjs[i] = cl;
            }
        }
        try {
            return Proxy.getProxyClass(appLoader, classObjs);
        } catch (IllegalArgumentException e) {
            throw new ClassNotFoundException(null, e);
        }
    }

    @Override
    protected Class resolveClass(ObjectStreamClass desc)
                throws IOException, ClassNotFoundException
    {
        Class clazz = inputStreamHelper.resolveClass(this, desc);
        if( clazz == null ) {
            try {
                // First try app class loader
                if(ClassUtil.classnameIsArray(desc.getName())) {
                    clazz = Class.forName(desc.getName(), false, appLoader);
                } else {
                    clazz = appLoader.loadClass(desc.getName());
                }
            }  catch (ClassNotFoundException e) {
                clazz = super.resolveClass(desc);
            }
        }

        return clazz;
    }
}