/*

 * Copyright (c) 2003, 2017, 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.

 */

/*

 * @author    Sun Microsystems, Inc.

 * @build        @BUILD_TAG_PLACEHOLDER@

 *

 * @COPYRIGHT_MINI_LEGAL_NOTICE_PLACEHOLDER@

 */

package sun.management.jmxremote;

import sun.misc.ObjectInputFilter;

import java.rmi.AccessException;

import java.rmi.NotBoundException;

import java.rmi.Remote;

import java.rmi.RemoteException;

import java.rmi.server.RMIClientSocketFactory;

import java.rmi.server.RMIServerSocketFactory;

import sun.rmi.registry.RegistryImpl;

/** A Registry that consists of a single entry that never changes. */

public class SingleEntryRegistry extends RegistryImpl {

    SingleEntryRegistry(int port, String name, Remote object)

            throws RemoteException {

        super(port, null, null, SingleEntryRegistry::singleRegistryFilter);

        this.name = name;

        this.object = object;

    }

    SingleEntryRegistry(int port,

                        RMIClientSocketFactory csf,

                        RMIServerSocketFactory ssf,

                        String name,

                        Remote object)

            throws RemoteException {

        super(port, csf, ssf, SingleEntryRegistry::singleRegistryFilter);

        this.name = name;

        this.object = object;

    }

    public String[] list() {

        return new String[] {name};

    }

    public Remote lookup(String name) throws NotBoundException {

        if (name.equals(this.name))

            return object;

        throw new NotBoundException("Not bound: \"" + name + "\" (only " +

                                    "bound name is \"" + this.name + "\")");

    }

    public void bind(String name, Remote obj) throws AccessException {

        throw new AccessException("Cannot modify this registry");

    }

    public void rebind(String name, Remote obj) throws AccessException {

        throw new AccessException("Cannot modify this registry");

    }

    public void unbind(String name) throws AccessException {

        throw new AccessException("Cannot modify this registry");

    }

    /**

     * ObjectInputFilter to check parameters to SingleEntryRegistry.

     * Since it is a read-only Registry, no classes are accepted.

     * String arguments are accepted without passing them to the serialFilter.

     *

     * @param info a reference to the serialization filter information

     * @return Status.REJECTED if parameters are out of range

     */

    private static ObjectInputFilter.Status singleRegistryFilter(ObjectInputFilter.FilterInfo info) {

        return (info.serialClass() != null ||

                info.depth() > 2 ||

                info.references() > 4 ||

                info.arrayLength() >= 0)

        ? ObjectInputFilter.Status.REJECTED

        : ObjectInputFilter.Status.ALLOWED;

    }

    private final String name;

    private final Remote object;

    private static final long serialVersionUID = -4897238949499730950L;

}