| 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.field; |
| 17 | |
| 18 | import java.io.Serializable; |
| 19 | import org.joda.time.DurationField; |
| 20 | import org.joda.time.DurationFieldType; |
| 21 | |
| 22 | /** |
| 23 | * <code>DelegatedDurationField</code> delegates each method call to the |
| 24 | * duration field it wraps. |
| 25 | * <p> |
| 26 | * DelegatedDurationField is thread-safe and immutable, and its subclasses must |
| 27 | * be as well. |
| 28 | * |
| 29 | * @author Brian S O'Neill |
| 30 | * @see DecoratedDurationField |
| 31 | * @since 1.0 |
| 32 | */ |
| 33 | public class DelegatedDurationField extends DurationField implements Serializable { |
| 34 | |
| 35 | /** Serialization lock. */ |
| 36 | private static final long serialVersionUID = -5576443481242007829L; |
| 37 | |
| 38 | /** The DurationField being wrapped */ |
| 39 | private final DurationField iField; |
| 40 | /** The field type */ |
| 41 | private final DurationFieldType iType; |
| 42 | |
| 43 | /** |
| 44 | * Constructor. |
| 45 | * |
| 46 | * @param field the base field |
| 47 | */ |
| 48 | protected DelegatedDurationField(DurationField field) { |
| 49 | this(field, null); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Constructor. |
| 54 | * |
| 55 | * @param field the base field |
| 56 | * @param type the field type to use |
| 57 | */ |
| 58 | protected DelegatedDurationField(DurationField field, DurationFieldType type) { |
| 59 | super(); |
| 60 | if (field == null) { |
| 61 | throw new IllegalArgumentException("The field must not be null"); |
| 62 | } |
| 63 | iField = field; |
| 64 | iType = (type == null ? field.getType() : type); |
| 65 | } |
| 66 | |
| 67 | //----------------------------------------------------------------------- |
| 68 | /** |
| 69 | * Gets the wrapped duration field. |
| 70 | * |
| 71 | * @return the wrapped DurationField |
| 72 | */ |
| 73 | public final DurationField getWrappedField() { |
| 74 | return iField; |
| 75 | } |
| 76 | |
| 77 | public DurationFieldType getType() { |
| 78 | return iType; |
| 79 | } |
| 80 | |
| 81 | public String getName() { |
| 82 | return iType.getName(); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Returns true if this field is supported. |
| 87 | */ |
| 88 | public boolean isSupported() { |
| 89 | return iField.isSupported(); |
| 90 | } |
| 91 | |
| 92 | public boolean isPrecise() { |
| 93 | return iField.isPrecise(); |
| 94 | } |
| 95 | |
| 96 | public int getValue(long duration) { |
| 97 | return iField.getValue(duration); |
| 98 | } |
| 99 | |
| 100 | public long getValueAsLong(long duration) { |
| 101 | return iField.getValueAsLong(duration); |
| 102 | } |
| 103 | |
| 104 | public int getValue(long duration, long instant) { |
| 105 | return iField.getValue(duration, instant); |
| 106 | } |
| 107 | |
| 108 | public long getValueAsLong(long duration, long instant) { |
| 109 | return iField.getValueAsLong(duration, instant); |
| 110 | } |
| 111 | |
| 112 | public long getMillis(int value) { |
| 113 | return iField.getMillis(value); |
| 114 | } |
| 115 | |
| 116 | public long getMillis(long value) { |
| 117 | return iField.getMillis(value); |
| 118 | } |
| 119 | |
| 120 | public long getMillis(int value, long instant) { |
| 121 | return iField.getMillis(value, instant); |
| 122 | } |
| 123 | |
| 124 | public long getMillis(long value, long instant) { |
| 125 | return iField.getMillis(value, instant); |
| 126 | } |
| 127 | |
| 128 | public long add(long instant, int value) { |
| 129 | return iField.add(instant, value); |
| 130 | } |
| 131 | |
| 132 | public long add(long instant, long value) { |
| 133 | return iField.add(instant, value); |
| 134 | } |
| 135 | |
| 136 | public int getDifference(long minuendInstant, long subtrahendInstant) { |
| 137 | return iField.getDifference(minuendInstant, subtrahendInstant); |
| 138 | } |
| 139 | |
| 140 | public long getDifferenceAsLong(long minuendInstant, long subtrahendInstant) { |
| 141 | return iField.getDifferenceAsLong(minuendInstant, subtrahendInstant); |
| 142 | } |
| 143 | |
| 144 | public long getUnitMillis() { |
| 145 | return iField.getUnitMillis(); |
| 146 | } |
| 147 | |
| 148 | public int compareTo(Object durationField) { |
| 149 | return iField.compareTo(durationField); |
| 150 | } |
| 151 | |
| 152 | public String toString() { |
| 153 | return (iType == null) ? iField.toString() : |
| 154 | ("DurationField[" + iType + ']'); |
| 155 | } |
| 156 | |
| 157 | } |