1 /* 2 * Copyright (c) 2010, 2011, 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 26 package java.nio.file; 27 28 import java.util.ConcurrentModificationException; 29 import java.util.Objects; 30 import java.io.IOException; 31 import java.io.ObjectInputStream; 32 import java.io.InvalidObjectException; 33 34 /** 35 * Runtime exception thrown if an I/O error is encountered when iterating over 36 * the entries in a directory. The I/O error is retrieved as an {@link 37 * IOException} using the {@link #getCause() getCause()} method. 38 * 39 * @since 1.7 40 * @see DirectoryStream 41 */ 42 43 public final class DirectoryIteratorException 44 extends ConcurrentModificationException 45 { 46 private static final long serialVersionUID = -6012699886086212874L; 47 48 /** 49 * Constructs an instance of this class. 50 * 51 * @param cause 52 * the {@code IOException} that caused the directory iteration 53 * to fail 54 * 55 * @throws NullPointerException 56 * if the cause is {@code null} 57 */ DirectoryIteratorException(IOException cause)58 public DirectoryIteratorException(IOException cause) { 59 super(Objects.requireNonNull(cause)); 60 } 61 62 /** 63 * Returns the cause of this exception. 64 * 65 * @return the cause 66 */ 67 @Override getCause()68 public IOException getCause() { 69 return (IOException)super.getCause(); 70 } 71 72 /** 73 * Called to read the object from a stream. 74 * 75 * @throws InvalidObjectException 76 * if the object is invalid or has a cause that is not 77 * an {@code IOException} 78 */ readObject(ObjectInputStream s)79 private void readObject(ObjectInputStream s) 80 throws IOException, ClassNotFoundException 81 { 82 s.defaultReadObject(); 83 Throwable cause = super.getCause(); 84 if (!(cause instanceof IOException)) 85 throw new InvalidObjectException("Cause must be an IOException"); 86 } 87 } 88