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,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether;
020
021/**
022 * The base class for exceptions thrown by the repository system. <em>Note:</em> Unless otherwise noted, instances of
023 * this class and its subclasses will not persist fields carrying extended error information during serialization.
024 */
025public class RepositoryException extends Exception {
026
027    /**
028     * Creates a new exception with the specified detail message.
029     *
030     * @param message The detail message, may be {@code null}.
031     */
032    public RepositoryException(String message) {
033        super(message);
034    }
035
036    /**
037     * Creates a new exception with the specified detail message and cause.
038     *
039     * @param message The detail message, may be {@code null}.
040     * @param cause The exception that caused this one, may be {@code null}.
041     */
042    public RepositoryException(String message, Throwable cause) {
043        super(message, cause);
044    }
045
046    /**
047     * @param  prefix The prefix.
048     * @param cause The exception that caused this one, may be {@code null}.
049     * @return The message.
050     * @noreference This method is not intended to be used by clients.
051     */
052    protected static String getMessage(String prefix, Throwable cause) {
053        String msg = "";
054        if (cause != null) {
055            msg = cause.getMessage();
056            if (msg == null || msg.isEmpty()) {
057                msg = cause.getClass().getSimpleName();
058            }
059            msg = prefix + msg;
060        }
061        return msg;
062    }
063}