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/*
 *  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.
 */

package org.apache.harmony.javax.security.auth.callback;

/**
 * Thrown when a {@link CallbackHandler} does not support a particular {@link
 * Callback}.
 */
public class UnsupportedCallbackException extends Exception {

    private static final long serialVersionUID = -6873556327655666839L;

    private Callback callback;

    /**
     * Creates a new exception instance and initializes it with just the
     * unsupported {@code Callback}, but no error message.
     *
     * @param callback
     *            the {@code Callback}
     */
    public UnsupportedCallbackException(Callback callback) {
        super();
        this.callback = callback;
    }

    /**
     * Creates a new exception instance and initializes it with both the
     * unsupported {@code Callback} and an error message.
     *
     * @param callback
     *            the {@code Callback}
     * @param message
     *            the error message
     */
    public UnsupportedCallbackException(Callback callback, String message) {
        super(message);
        this.callback = callback;
    }

    /**
     * Returns the unsupported {@code Callback} that triggered this exception.
     *
     * @return the {@code Callback}
     */
    public Callback getCallback() {
        return callback;
    }
}