001/*
002 * Copyright 2002-2014 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.core;
018
019import java.io.IOException;
020
021/**
022 * Subclass of {@link IOException} that properly handles a root cause,
023 * exposing the root cause just like NestedChecked/RuntimeException does.
024 *
025 * <p>Proper root cause handling has not been added to standard IOException before
026 * Java 6, which is why we need to do it ourselves for Java 5 compatibility purposes.
027 *
028 * <p>The similarity between this class and the NestedChecked/RuntimeException
029 * class is unavoidable, as this class needs to derive from IOException.
030 *
031 * @author Juergen Hoeller
032 * @since 2.0
033 * @see #getMessage
034 * @see #printStackTrace
035 * @see org.springframework.core.NestedCheckedException
036 * @see org.springframework.core.NestedRuntimeException
037 */
038@SuppressWarnings("serial")
039public class NestedIOException extends IOException {
040
041        static {
042                // Eagerly load the NestedExceptionUtils class to avoid classloader deadlock
043                // issues on OSGi when calling getMessage(). Reported by Don Brown; SPR-5607.
044                NestedExceptionUtils.class.getName();
045        }
046
047
048        /**
049         * Construct a {@code NestedIOException} with the specified detail message.
050         * @param msg the detail message
051         */
052        public NestedIOException(String msg) {
053                super(msg);
054        }
055
056        /**
057         * Construct a {@code NestedIOException} with the specified detail message
058         * and nested exception.
059         * @param msg the detail message
060         * @param cause the nested exception
061         */
062        public NestedIOException(String msg, Throwable cause) {
063                super(msg, cause);
064        }
065
066
067        /**
068         * Return the detail message, including the message from the nested exception
069         * if there is one.
070         */
071        @Override
072        public String getMessage() {
073                return NestedExceptionUtils.buildMessage(super.getMessage(), getCause());
074        }
075
076}