/**
 *
 * Copyright 2006 The Apache Software Foundation
 *
 *  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 commonj.sdo.impl;

/**
 * Exception indicating that a HelperProvider could not be located or instantiated.
 * The message will be set to the name of the implementation class; a null value
 * indicates that the name of the implementation could not be determined.
 * The cause will be set to the Throwable that prevented the provider from being
 * located or created.
 *
 * @version $Revision$ $Date$
 */
public class NoHelperProviderException extends RuntimeException {
    private static final long serialVersionUID = 727646133930924084L;

    public NoHelperProviderException() {
    }

    public NoHelperProviderException(String message) {
        super(message);
    }

    public NoHelperProviderException(String message, Throwable cause) {
        super(message, cause);
    }

    public NoHelperProviderException(Throwable cause) {
        super(cause);
    }

    /**
     * Return the name of the implementation class that could not be provided.
     *
     * @return the name of the implementation class; may be null if not known
     */
    public String getImplementationName() {
        return getMessage();
    }
}