1 /* 2 * Copyright 2001-2009 Stephen Colebourne 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.joda.time.convert; 17 18 import org.joda.time.Chronology; 19 import org.joda.time.PeriodType; 20 import org.joda.time.ReadWritablePeriod; 21 import org.joda.time.ReadablePeriod; 22 23 /** 24 * ReadablePeriodConverter extracts milliseconds and chronology from a ReadablePeriod. 25 * 26 * @author Stephen Colebourne 27 * @author Brian S O'Neill 28 * @since 1.0 29 */ 30 class ReadablePeriodConverter extends AbstractConverter 31 implements PeriodConverter { 32 33 /** 34 * Singleton instance. 35 */ 36 static final ReadablePeriodConverter INSTANCE = new ReadablePeriodConverter(); 37 38 /** 39 * Restricted constructor. 40 */ 41 protected ReadablePeriodConverter() { 42 super(); 43 } 44 45 //----------------------------------------------------------------------- 46 /** 47 * Extracts duration values from an object of this converter's type, and 48 * sets them into the given ReadWritablePeriod. 49 * 50 * @param duration duration to get modified 51 * @param object the object to convert, must not be null 52 * @param chrono the chronology to use 53 * @throws NullPointerException if the duration or object is null 54 * @throws ClassCastException if the object is an invalid type 55 * @throws IllegalArgumentException if the object is invalid 56 */ 57 public void setInto(ReadWritablePeriod duration, Object object, Chronology chrono) { 58 duration.setPeriod((ReadablePeriod) object); 59 } 60 61 /** 62 * Selects a suitable period type for the given object. 63 * 64 * @param object the object to examine, must not be null 65 * @return the period type from the readable duration 66 * @throws NullPointerException if the object is null 67 * @throws ClassCastException if the object is an invalid type 68 */ 69 public PeriodType getPeriodType(Object object) { 70 ReadablePeriod period = (ReadablePeriod) object; 71 return period.getPeriodType(); 72 } 73 74 //----------------------------------------------------------------------- 75 /** 76 * Returns ReadablePeriod class. 77 * 78 * @return ReadablePeriod.class 79 */ 80 public Class<?> getSupportedType() { 81 return ReadablePeriod.class; 82 } 83 84 }