001package org.eclipse.aether;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 * 
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 * 
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022/**
023 * The base class for exceptions thrown by the repository system. <em>Note:</em> Unless otherwise noted, instances of
024 * this class and its subclasses will not persist fields carrying extended error information during serialization.
025 */
026public class RepositoryException
027    extends Exception
028{
029
030    /**
031     * Creates a new exception with the specified detail message.
032     * 
033     * @param message The detail message, may be {@code null}.
034     */
035    public RepositoryException( String message )
036    {
037        super( message );
038    }
039
040    /**
041     * Creates a new exception with the specified detail message and cause.
042     * 
043     * @param message The detail message, may be {@code null}.
044     * @param cause The exception that caused this one, may be {@code null}.
045     */
046    public RepositoryException( String message, Throwable cause )
047    {
048        super( message, cause );
049    }
050
051    /**
052     * @param  prefix The prefix.
053     * @param cause The exception that caused this one, may be {@code null}.
054     * @return The message.
055     * @noreference This method is not intended to be used by clients.
056     */
057    protected static String getMessage( String prefix, Throwable cause )
058    {
059        String msg = "";
060        if ( cause != null )
061        {
062            msg = cause.getMessage();
063            if ( msg == null || msg.length() <= 0 )
064            {
065                msg = cause.getClass().getSimpleName();
066            }
067            msg = prefix + msg;
068        }
069        return msg;
070    }
071
072}