| 1 | /* |
| 2 | * Copyright 2001-2005 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.chrono; |
| 17 | |
| 18 | import org.joda.time.DateTimeField; |
| 19 | import org.joda.time.DateTimeFieldType; |
| 20 | import org.joda.time.ReadablePartial; |
| 21 | import org.joda.time.field.DecoratedDateTimeField; |
| 22 | import org.joda.time.field.FieldUtils; |
| 23 | |
| 24 | /** |
| 25 | * This field is not publicy exposed by ISOChronology, but rather it is used to |
| 26 | * build the yearOfCentury and centuryOfEra fields. It merely drops the sign of |
| 27 | * the year. |
| 28 | * |
| 29 | * @author Brian S O'Neill |
| 30 | * @see GJYearOfEraDateTimeField |
| 31 | * @since 1.0 |
| 32 | */ |
| 33 | class ISOYearOfEraDateTimeField extends DecoratedDateTimeField { |
| 34 | |
| 35 | private static final long serialVersionUID = 7037524068969447317L; |
| 36 | |
| 37 | /** |
| 38 | * Singleton instance |
| 39 | */ |
| 40 | static final DateTimeField INSTANCE = new ISOYearOfEraDateTimeField(); |
| 41 | |
| 42 | /** |
| 43 | * Restricted constructor. |
| 44 | */ |
| 45 | private ISOYearOfEraDateTimeField() { |
| 46 | super(GregorianChronology.getInstanceUTC().year(), DateTimeFieldType.yearOfEra()); |
| 47 | } |
| 48 | |
| 49 | public int get(long instant) { |
| 50 | int year = getWrappedField().get(instant); |
| 51 | return year < 0 ? -year : year; |
| 52 | } |
| 53 | |
| 54 | public long add(long instant, int years) { |
| 55 | return getWrappedField().add(instant, years); |
| 56 | } |
| 57 | |
| 58 | public long add(long instant, long years) { |
| 59 | return getWrappedField().add(instant, years); |
| 60 | } |
| 61 | |
| 62 | public long addWrapField(long instant, int years) { |
| 63 | return getWrappedField().addWrapField(instant, years); |
| 64 | } |
| 65 | |
| 66 | public int[] addWrapField(ReadablePartial instant, int fieldIndex, int[] values, int years) { |
| 67 | return getWrappedField().addWrapField(instant, fieldIndex, values, years); |
| 68 | } |
| 69 | |
| 70 | public int getDifference(long minuendInstant, long subtrahendInstant) { |
| 71 | return getWrappedField().getDifference(minuendInstant, subtrahendInstant); |
| 72 | } |
| 73 | |
| 74 | public long getDifferenceAsLong(long minuendInstant, long subtrahendInstant) { |
| 75 | return getWrappedField().getDifferenceAsLong(minuendInstant, subtrahendInstant); |
| 76 | } |
| 77 | |
| 78 | public long set(long instant, int year) { |
| 79 | FieldUtils.verifyValueBounds(this, year, 0, getMaximumValue()); |
| 80 | if (getWrappedField().get(instant) < 0) { |
| 81 | year = -year; |
| 82 | } |
| 83 | return super.set(instant, year); |
| 84 | } |
| 85 | |
| 86 | public int getMinimumValue() { |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | public int getMaximumValue() { |
| 91 | return getWrappedField().getMaximumValue(); |
| 92 | } |
| 93 | |
| 94 | public long roundFloor(long instant) { |
| 95 | return getWrappedField().roundFloor(instant); |
| 96 | } |
| 97 | |
| 98 | public long roundCeiling(long instant) { |
| 99 | return getWrappedField().roundCeiling(instant); |
| 100 | } |
| 101 | |
| 102 | public long remainder(long instant) { |
| 103 | return getWrappedField().remainder(instant); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Serialization singleton |
| 108 | */ |
| 109 | private Object readResolve() { |
| 110 | return INSTANCE; |
| 111 | } |
| 112 | } |