1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.io;
19
20 import java.io.IOException;
21
22 /**
23 * A IOException associated with a source index.
24 *
25 * @since 2.7
26 */
27 public class IOIndexedException extends IOException {
28
29 private static final long serialVersionUID = 1L;
30
31 /**
32 * Converts input to a suitable String for exception message.
33 *
34 * @param index An index into a source collection.
35 * @param cause A cause.
36 * @return A message.
37 */
38 protected static String toMessage(final int index, final Throwable cause) {
39 // Letting index be any int
40 final String unspecified = "Null";
41 final String name = cause == null ? unspecified : cause.getClass().getSimpleName();
42 final String msg = cause == null ? unspecified : cause.getMessage();
43 return String.format("%s #%,d: %s", name, index, msg);
44 }
45
46 /**
47 * Index.
48 */
49 private final int index;
50
51 /**
52 * Constructs a new exception.
53 *
54 * @param index index of this exception.
55 * @param cause cause exceptions.
56 */
57 public IOIndexedException(final int index, final Throwable cause) {
58 super(toMessage(index, cause), cause);
59 this.index = index;
60 }
61
62 /**
63 * The index of this exception.
64 *
65 * @return index of this exception.
66 */
67 public int getIndex() {
68 return index;
69 }
70
71 }