package org.eclipse.aether;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *  http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * The base class for exceptions thrown by the repository system. <em>Note:</em> Unless otherwise noted, instances of
 * this class and its subclasses will not persist fields carrying extended error information during serialization.
 */
public class RepositoryException
    extends Exception
{

    /**
     * Creates a new exception with the specified detail message.
     * 
     * @param message The detail message, may be {@code null}.
     */
    public RepositoryException( String message )
    {
        super( message );
    }

    /**
     * Creates a new exception with the specified detail message and cause.
     * 
     * @param message The detail message, may be {@code null}.
     * @param cause The exception that caused this one, may be {@code null}.
     */
    public RepositoryException( String message, Throwable cause )
    {
        super( message, cause );
    }

    /**
     * @param  prefix The prefix.
     * @param cause The exception that caused this one, may be {@code null}.
     * @return The message.
     * @noreference This method is not intended to be used by clients.
     */
    protected static String getMessage( String prefix, Throwable cause )
    {
        String msg = "";
        if ( cause != null )
        {
            msg = cause.getMessage();
            if ( msg == null || msg.length() <= 0 )
            {
                msg = cause.getClass().getSimpleName();
            }
            msg = prefix + msg;
        }
        return msg;
    }

}