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.DateTimeZone; 21 import org.joda.time.ReadablePartial; 22 23 /** 24 * ReadablePartialConverter extracts partial fields and chronology from a ReadablePartial. 25 * 26 * @author Stephen Colebourne 27 * @since 1.0 28 */ 29 class ReadablePartialConverter extends AbstractConverter 30 implements PartialConverter { 31 32 /** 33 * Singleton instance. 34 */ 35 static final ReadablePartialConverter INSTANCE = new ReadablePartialConverter(); 36 37 /** 38 * Restricted constructor. 39 */ 40 protected ReadablePartialConverter() { 41 super(); 42 } 43 44 //----------------------------------------------------------------------- 45 /** 46 * Gets the chronology, which is taken from the ReadablePartial. 47 * 48 * @param object the ReadablePartial to convert, must not be null 49 * @param zone the specified zone to use, null means default zone 50 * @return the chronology, never null 51 */ 52 public Chronology getChronology(Object object, DateTimeZone zone) { 53 return getChronology(object, (Chronology) null).withZone(zone); 54 } 55 56 /** 57 * Gets the chronology, which is taken from the ReadableInstant. 58 * <p> 59 * If the passed in chronology is non-null, it is used. 60 * Otherwise the chronology from the instant is used. 61 * 62 * @param object the ReadablePartial to convert, must not be null 63 * @param chrono the chronology to use, null means use that from object 64 * @return the chronology, never null 65 */ 66 public Chronology getChronology(Object object, Chronology chrono) { 67 if (chrono == null) { 68 chrono = ((ReadablePartial) object).getChronology(); 69 chrono = DateTimeUtils.getChronology(chrono); 70 } 71 return chrono; 72 } 73 74 /** 75 * Extracts the values of the partial from an object of this converter's type. 76 * The chrono parameter is a hint to the converter, should it require a 77 * chronology to aid in conversion. 78 * 79 * @param fieldSource a partial that provides access to the fields. 80 * This partial may be incomplete and only getFieldType(int) should be used 81 * @param object the object to convert 82 * @param chrono the chronology to use, which is the non-null result of getChronology() 83 * @return the array of field values that match the fieldSource, must be non-null valid 84 * @throws ClassCastException if the object is invalid 85 */ 86 public int[] getPartialValues(ReadablePartial fieldSource, Object object, Chronology chrono) { 87 ReadablePartial input = (ReadablePartial) object; 88 int size = fieldSource.size(); 89 int[] values = new int[size]; 90 for (int i = 0; i < size; i++) { 91 values[i] = input.get(fieldSource.getFieldType(i)); 92 } 93 chrono.validate(fieldSource, values); 94 return values; 95 } 96 97 //----------------------------------------------------------------------- 98 /** 99 * Returns ReadableInstant.class. 100 * 101 * @return ReadableInstant.class 102 */ 103 public Class<?> getSupportedType() { 104 return ReadablePartial.class; 105 } 106 107 }