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 */ 016 package 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 */ 025 public 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 }