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| 1 | /* | ||
| 2 | * Copyright (c) 2007, 2009, 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.io.IOException; | ||
| 29 | |||
| 30 | /** | ||
| 31 | * Thrown when a file system operation fails on one or two files. This class is | ||
| 32 | * the general class for file system exceptions. | ||
| 33 | * | ||
| 34 | * @since 1.7 | ||
| 35 | */ | ||
| 36 | |||
| 37 | public class FileSystemException | ||
| 38 | extends IOException | ||
| 39 | { | ||
| 40 | static final long serialVersionUID = -3055425747967319812L; | ||
| 41 | |||
| 42 | private final String file; | ||
| 43 | private final String other; | ||
| 44 | |||
| 45 | /** | ||
| 46 | * Constructs an instance of this class. This constructor should be used | ||
| 47 | * when an operation involving one file fails and there isn't any additional | ||
| 48 | * information to explain the reason. | ||
| 49 | * | ||
| 50 | * @param file | ||
| 51 | * a string identifying the file or {@code null} if not known. | ||
| 52 | */ | ||
| 53 | public FileSystemException(String file) { | ||
| 54 | super((String)null); | ||
| 55 | this.file = file; | ||
| 56 | this.other = null; | ||
| 57 | } | ||
| 58 | |||
| 59 | /** | ||
| 60 | * Constructs an instance of this class. This constructor should be used | ||
| 61 | * when an operation involving two files fails, or there is additional | ||
| 62 | * information to explain the reason. | ||
| 63 | * | ||
| 64 | * @param file | ||
| 65 | * a string identifying the file or {@code null} if not known. | ||
| 66 | * @param other | ||
| 67 | * a string identifying the other file or {@code null} if there | ||
| 68 | * isn't another file or if not known | ||
| 69 | * @param reason | ||
| 70 | * a reason message with additional information or {@code null} | ||
| 71 | */ | ||
| 72 | public FileSystemException(String file, String other, String reason) { | ||
| 73 | super(reason); | ||
| 74 | this.file = file; | ||
| 75 | this.other = other; | ||
| 76 | } | ||
| 77 | |||
| 78 | /** | ||
| 79 | * Returns the file used to create this exception. | ||
| 80 | * | ||
| 81 | * @return the file (can be {@code null}) | ||
| 82 | */ | ||
| 83 | public String getFile() { | ||
| 84 | return file; | ||
| 85 | } | ||
| 86 | |||
| 87 | /** | ||
| 88 | * Returns the other file used to create this exception. | ||
| 89 | * | ||
| 90 | * @return the other file (can be {@code null}) | ||
| 91 | */ | ||
| 92 | public String getOtherFile() { | ||
| 93 | return other; | ||
| 94 | } | ||
| 95 | |||
| 96 | /** | ||
| 97 | * Returns the string explaining why the file system operation failed. | ||
| 98 | * | ||
| 99 | * @return the string explaining why the file system operation failed | ||
| 100 | */ | ||
| 101 | public String getReason() { | ||
| 102 | return super.getMessage(); | ||
| 103 | } | ||
| 104 | |||
| 105 | /** | ||
| 106 | * Returns the detail message string. | ||
| 107 | */ | ||
| 108 | @Override | ||
| 109 | public String getMessage() { | ||
| 110 | if (file == null && other == null) | ||
| 111 | return getReason(); | ||
| 112 | StringBuilder sb = new StringBuilder(); | ||
| 113 | if (file != null) | ||
| 114 | sb.append(file); | ||
| 115 | if (other != null) { | ||
| 116 | sb.append(" -> "); | ||
| 117 | sb.append(other); | ||
| 118 | } | ||
| 119 | if (getReason() != null) { | ||
| 120 | sb.append(": "); | ||
| 121 | sb.append(getReason()); | ||
| 122 | } | ||
| 123 | return sb.toString(); | ||
| 124 | } | ||
| 125 | } | ||