/*

 * Copyright (c) 2000, 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

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 */

package javax.imageio.spi;

/**

 * An optional interface that may be provided by service provider

 * objects that will be registered with a

 * <code>ServiceRegistry</code>.  If this interface is present,

 * notification of registration and deregistration will be performed.

 *

 * @see ServiceRegistry

 *

 */

public interface RegisterableService {

    /**

     * Called when an object implementing this interface is added to

     * the given <code>category</code> of the given

     * <code>registry</code>.  The object may already be registered

     * under another category or categories.

     *

     * @param registry a <code>ServiceRegistry</code> where this

     * object has been registered.

     * @param category a <code>Class</code> object indicating the

     * registry category under which this object has been registered.

     */

    void onRegistration(ServiceRegistry registry, Class<?> category);

    /**

     * Called when an object implementing this interface is removed

     * from the given <code>category</code> of the given

     * <code>registry</code>.  The object may still be registered

     * under another category or categories.

     *

     * @param registry a <code>ServiceRegistry</code> from which this

     * object is being (wholly or partially) deregistered.

     * @param category a <code>Class</code> object indicating the

     * registry category from which this object is being deregistered.

     */

    void onDeregistration(ServiceRegistry registry, Class<?> category);

}