| 1 | /* |
| 2 | * Copyright 2001-2006 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 | } |