/*

 * Copyright (c) 2016, 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

 *

 * 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.

 */

import java.io.Closeable;

import java.io.IOException;

/**

 * Implemented by closeable objects which might be able to report

 * an error when closed due to exceptional conditions.

 */

public interface ExceptionallyCloseable extends Closeable {

    /**

     * Called when an instance of {@code ExceptionallyCloseable} is closed

     * due to some exceptional condition revealed by {@code cause}.

     *

     * @implSpec The default implementation of this method simply calls

     *           {@link #close()}. Implementation of this interface are

     *           suppose to override this method in order to ensure that

     *           the cause is properly reported.

     *

     * @param cause The reason for which the object is closed.

     * @throws IOException if {@link #close()} fails.

     */

    public default void closeExceptionally(Throwable cause) throws IOException {

        close();

    }

    public static void close(Throwable t, Closeable c) throws IOException {

        if (c instanceof ExceptionallyCloseable) {

            ((ExceptionallyCloseable)c).closeExceptionally(t);

        } else {

            c.close();

        }

    }

}