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.DateTimeUtils; 20 import org.joda.time.ReadWritableInterval; 21 import org.joda.time.ReadWritablePeriod; 22 import org.joda.time.ReadableInterval; 23 24 /** 25 * Converts intervals into durations of any requested period type. 26 * 27 * @author Brian S O'Neill 28 * @since 1.0 29 */ 30 class ReadableIntervalConverter extends AbstractConverter 31 implements IntervalConverter, DurationConverter, PeriodConverter { 32 33 /** 34 * Singleton instance. 35 */ 36 static final ReadableIntervalConverter INSTANCE = new ReadableIntervalConverter(); 37 38 /** 39 * Restricted constructor. 40 */ 41 protected ReadableIntervalConverter() { 42 super(); 43 } 44 45 //----------------------------------------------------------------------- 46 /** 47 * Gets the millisecond length of the interval. 48 * 49 * @param object the interval 50 */ 51 public long getDurationMillis(Object object) { 52 return (((ReadableInterval) object)).toDurationMillis(); 53 } 54 55 //----------------------------------------------------------------------- 56 /** 57 * Sets the values of the mutable duration from the specified interval. 58 * 59 * @param writablePeriod the period to modify 60 * @param object the interval to set from 61 * @param chrono the chronology to use 62 */ 63 public void setInto(ReadWritablePeriod writablePeriod, Object object, Chronology chrono) { 64 ReadableInterval interval = (ReadableInterval) object; 65 chrono = (chrono != null ? chrono : DateTimeUtils.getIntervalChronology(interval)); 66 long start = interval.getStartMillis(); 67 long end = interval.getEndMillis(); 68 int[] values = chrono.get(writablePeriod, start, end); 69 for (int i = 0; i < values.length; i++) { 70 writablePeriod.setValue(i, values[i]); 71 } 72 } 73 74 //----------------------------------------------------------------------- 75 /** 76 * Checks if the input is a ReadableInterval. 77 * <p> 78 * If it is, then the calling code should cast and copy the fields directly. 79 * 80 * @param object the object to convert, must not be null 81 * @param chrono the chronology to use, may be null 82 * @return true if the input is a ReadableInterval 83 * @throws ClassCastException if the object is invalid 84 */ 85 public boolean isReadableInterval(Object object, Chronology chrono) { 86 return true; 87 } 88 89 /** 90 * Extracts interval endpoint values from an object of this converter's 91 * type, and sets them into the given ReadWritableInterval. 92 * 93 * @param writableInterval interval to get modified, not null 94 * @param object the object to convert, must not be null 95 * @param chrono the chronology to use, may be null 96 * @throws ClassCastException if the object is invalid 97 */ 98 public void setInto(ReadWritableInterval writableInterval, Object object, Chronology chrono) { 99 ReadableInterval input = (ReadableInterval) object; 100 writableInterval.setInterval(input); 101 if (chrono != null) { 102 writableInterval.setChronology(chrono); 103 } else { 104 writableInterval.setChronology(input.getChronology()); 105 } 106 } 107 108 //----------------------------------------------------------------------- 109 /** 110 * Returns ReadableInterval.class. 111 */ 112 public Class<?> getSupportedType() { 113 return ReadableInterval.class; 114 } 115 116 }