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 * http://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 package org.apache.commons.fileupload; 18 19 import java.io.PrintStream; 20 import java.io.PrintWriter; 21 22 /** 23 * Exception for errors encountered while processing the request. 24 */ 25 public class FileUploadException extends Exception { 26 27 /** 28 * Serial version UID, being used, if the exception 29 * is serialized. 30 */ 31 private static final long serialVersionUID = 8881893724388807504L; 32 33 /** 34 * The exceptions cause. We overwrite the cause of 35 * the super class, which isn't available in Java 1.3. 36 */ 37 private final Throwable cause; 38 39 /** 40 * Constructs a new <code>FileUploadException</code> without message. 41 */ 42 public FileUploadException() { 43 this(null, null); 44 } 45 46 /** 47 * Constructs a new <code>FileUploadException</code> with specified detail 48 * message. 49 * 50 * @param msg the error message. 51 */ 52 public FileUploadException(final String msg) { 53 this(msg, null); 54 } 55 56 /** 57 * Creates a new <code>FileUploadException</code> with the given 58 * detail message and cause. 59 * 60 * @param msg The exceptions detail message. 61 * @param cause The exceptions cause. 62 */ 63 public FileUploadException(String msg, Throwable cause) { 64 super(msg); 65 this.cause = cause; 66 } 67 68 /** 69 * Prints this throwable and its backtrace to the specified print stream. 70 * 71 * @param stream <code>PrintStream</code> to use for output 72 */ 73 @Override 74 public void printStackTrace(PrintStream stream) { 75 super.printStackTrace(stream); 76 if (cause != null) { 77 stream.println("Caused by:"); 78 cause.printStackTrace(stream); 79 } 80 } 81 82 /** 83 * Prints this throwable and its backtrace to the specified 84 * print writer. 85 * 86 * @param writer <code>PrintWriter</code> to use for output 87 */ 88 @Override 89 public void printStackTrace(PrintWriter writer) { 90 super.printStackTrace(writer); 91 if (cause != null) { 92 writer.println("Caused by:"); 93 cause.printStackTrace(writer); 94 } 95 } 96 97 /** 98 * {@inheritDoc} 99 */ 100 @Override 101 public Throwable getCause() { 102 return cause; 103 } 104 105 }