/*
 * Copyright 2005-2008 Les Hazlewood
 *
 * Licensed 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.
 */
package org.jsecurity.authc;

/**
 * Thrown when attempting to authenticate with a principal that doesn't exist in the system (e.g.
 * by specifying a username that doesn't relate to a user account).
 *
 * <p>Whether or not an application wishes to alert a user logging in to the system of this fact is
 * at the discretion of those responsible for designing the view and what happens when this
 * exception occurs.
 *
 * @since 0.1
 * @author Les Hazlewood
 */
public class UnknownAccountException extends AccountException {

    /**
     * Creates a new UnknownAccountException.
     */
    public UnknownAccountException() {
        super();
    }

    /**
     * Constructs a new UnknownAccountException.
     * @param message the reason for the exception
     */
    public UnknownAccountException( String message ) {
        super( message );
    }

    /**
     * Constructs a new UnknownAccountException.
     * @param cause the underlying Throwable that caused this exception to be thrown.
     */
    public UnknownAccountException( Throwable cause ) {
        super( cause );
    }

    /**
     * Constructs a new UnknownAccountException.
     * @param message the reason for the exception
     * @param cause the underlying Throwable that caused this exception to be thrown.
     */
    public UnknownAccountException( String message, Throwable cause ) {
        super( message, cause );
    }
}