001/*
002 *  Copyright 2001-2005 Stephen Colebourne
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.joda.time.convert;
017
018/**
019 * DurationConverter defines how an object is converted to a millisecond duration.
020 *
021 * @author Stephen Colebourne
022 * @author Brian S O'Neill
023 * @since 1.0
024 */
025public interface DurationConverter extends Converter {
026
027    /**
028     * Extracts the millis from an object of this convertor's type.
029     * 
030     * @param object  the object to convert, must not be null
031     * @return the millisecond duration
032     * @throws ClassCastException if the object is invalid
033     */
034    long getDurationMillis(Object object);
035
036}