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/*
 *  Copyright 2001-2005 Stephen Colebourne
 *
 *  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.joda.time.convert;

/**
 * DurationConverter defines how an object is converted to a millisecond duration.
 *
 * @author Stephen Colebourne
 * @author Brian S O'Neill
 * @since 1.0
 */
public interface DurationConverter extends Converter {

    /**
     * Extracts the millis from an object of this converter's type.
     * 
     * @param object  the object to convert, must not be null
     * @return the millisecond duration
     * @throws ClassCastException if the object is invalid
     */
    long getDurationMillis(Object object);

}