1 /* 2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.io.Closeable; 25 import java.io.IOException; 26 27 /** 28 * Implemented by closeable objects which might be able to report 29 * an error when closed due to exceptional conditions. 30 */ 31 public interface ExceptionallyCloseable extends Closeable { 32 33 /** 34 * Called when an instance of {@code ExceptionallyCloseable} is closed 35 * due to some exceptional condition revealed by {@code cause}. 36 * 37 * @implSpec The default implementation of this method simply calls 38 * {@link #close()}. Implementation of this interface are 39 * suppose to override this method in order to ensure that 40 * the cause is properly reported. 41 * 42 * @param cause The reason for which the object is closed. 43 * @throws IOException if {@link #close()} fails. 44 */ 45 public default void closeExceptionally(Throwable cause) throws IOException { 46 close(); 47 } 48 49 public static void close(Throwable t, Closeable c) throws IOException { 50 if (c instanceof ExceptionallyCloseable) { 51 ((ExceptionallyCloseable)c).closeExceptionally(t); 52 } else { 53 c.close(); 54 } 55 } 56 }