1 /* 2 * Copyright (c) 2012, 2013, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package java.io; 26 27 import java.util.Objects; 28 29 /** 30 * Wraps an {@link IOException} with an unchecked exception. 31 * 32 * @since 1.8 33 */ 34 public class UncheckedIOException extends RuntimeException { 35 private static final long serialVersionUID = -8134305061645241065L; 36 37 /** 38 * Constructs an instance of this class. 39 * 40 * @param message 41 * the detail message, can be null 42 * @param cause 43 * the {@code IOException} 44 * 45 * @throws NullPointerException 46 * if the cause is {@code null} 47 */ UncheckedIOException(String message, IOException cause)48 public UncheckedIOException(String message, IOException cause) { 49 super(message, Objects.requireNonNull(cause)); 50 } 51 52 /** 53 * Constructs an instance of this class. 54 * 55 * @param cause 56 * the {@code IOException} 57 * 58 * @throws NullPointerException 59 * if the cause is {@code null} 60 */ UncheckedIOException(IOException cause)61 public UncheckedIOException(IOException cause) { 62 super(Objects.requireNonNull(cause)); 63 } 64 65 /** 66 * Returns the cause of this exception. 67 * 68 * @return the {@code IOException} which is the cause of this exception. 69 */ 70 @Override getCause()71 public IOException getCause() { 72 return (IOException) super.getCause(); 73 } 74 75 /** 76 * Called to read the object from a stream. 77 * 78 * @throws InvalidObjectException 79 * if the object is invalid or has a cause that is not 80 * an {@code IOException} 81 */ readObject(ObjectInputStream s)82 private void readObject(ObjectInputStream s) 83 throws IOException, ClassNotFoundException 84 { 85 s.defaultReadObject(); 86 Throwable cause = super.getCause(); 87 if (!(cause instanceof IOException)) 88 throw new InvalidObjectException("Cause must be an IOException"); 89 } 90 } 91