001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.io; 019 020import java.io.IOException; 021import java.util.List; 022 023import org.apache.hadoop.classification.InterfaceAudience; 024import org.apache.hadoop.classification.InterfaceStability; 025 026/** Encapsulate a list of {@link IOException} into an {@link IOException} */ 027@InterfaceAudience.Public 028@InterfaceStability.Stable 029public class MultipleIOException extends IOException { 030 /** Require by {@link java.io.Serializable} */ 031 private static final long serialVersionUID = 1L; 032 033 private final List<IOException> exceptions; 034 035 /** Constructor is private, use {@link #createIOException(List)}. */ 036 private MultipleIOException(List<IOException> exceptions) { 037 super(exceptions.size() + " exceptions " + exceptions); 038 this.exceptions = exceptions; 039 } 040 041 /** @return the underlying exceptions */ 042 public List<IOException> getExceptions() {return exceptions;} 043 044 /** A convenient method to create an {@link IOException}. */ 045 public static IOException createIOException(List<IOException> exceptions) { 046 if (exceptions == null || exceptions.isEmpty()) { 047 return null; 048 } 049 if (exceptions.size() == 1) { 050 return exceptions.get(0); 051 } 052 return new MultipleIOException(exceptions); 053 } 054}