001 /* 002 * Copyright 2001-2009 Stephen Colebourne 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 package org.joda.time.field; 017 018 import java.io.Serializable; 019 020 import org.joda.time.DurationField; 021 import org.joda.time.DurationFieldType; 022 023 /** 024 * <code>DelegatedDurationField</code> delegates each method call to the 025 * duration field it wraps. 026 * <p> 027 * DelegatedDurationField is thread-safe and immutable, and its subclasses must 028 * be as well. 029 * 030 * @author Brian S O'Neill 031 * @see DecoratedDurationField 032 * @since 1.0 033 */ 034 public class DelegatedDurationField extends DurationField implements Serializable { 035 036 /** Serialization lock. */ 037 private static final long serialVersionUID = -5576443481242007829L; 038 039 /** The DurationField being wrapped */ 040 private final DurationField iField; 041 /** The field type */ 042 private final DurationFieldType iType; 043 044 /** 045 * Constructor. 046 * 047 * @param field the base field 048 */ 049 protected DelegatedDurationField(DurationField field) { 050 this(field, null); 051 } 052 053 /** 054 * Constructor. 055 * 056 * @param field the base field 057 * @param type the field type to use 058 */ 059 protected DelegatedDurationField(DurationField field, DurationFieldType type) { 060 super(); 061 if (field == null) { 062 throw new IllegalArgumentException("The field must not be null"); 063 } 064 iField = field; 065 iType = (type == null ? field.getType() : type); 066 } 067 068 //----------------------------------------------------------------------- 069 /** 070 * Gets the wrapped duration field. 071 * 072 * @return the wrapped DurationField 073 */ 074 public final DurationField getWrappedField() { 075 return iField; 076 } 077 078 public DurationFieldType getType() { 079 return iType; 080 } 081 082 public String getName() { 083 return iType.getName(); 084 } 085 086 /** 087 * Returns true if this field is supported. 088 */ 089 public boolean isSupported() { 090 return iField.isSupported(); 091 } 092 093 public boolean isPrecise() { 094 return iField.isPrecise(); 095 } 096 097 public int getValue(long duration) { 098 return iField.getValue(duration); 099 } 100 101 public long getValueAsLong(long duration) { 102 return iField.getValueAsLong(duration); 103 } 104 105 public int getValue(long duration, long instant) { 106 return iField.getValue(duration, instant); 107 } 108 109 public long getValueAsLong(long duration, long instant) { 110 return iField.getValueAsLong(duration, instant); 111 } 112 113 public long getMillis(int value) { 114 return iField.getMillis(value); 115 } 116 117 public long getMillis(long value) { 118 return iField.getMillis(value); 119 } 120 121 public long getMillis(int value, long instant) { 122 return iField.getMillis(value, instant); 123 } 124 125 public long getMillis(long value, long instant) { 126 return iField.getMillis(value, instant); 127 } 128 129 public long add(long instant, int value) { 130 return iField.add(instant, value); 131 } 132 133 public long add(long instant, long value) { 134 return iField.add(instant, value); 135 } 136 137 public int getDifference(long minuendInstant, long subtrahendInstant) { 138 return iField.getDifference(minuendInstant, subtrahendInstant); 139 } 140 141 public long getDifferenceAsLong(long minuendInstant, long subtrahendInstant) { 142 return iField.getDifferenceAsLong(minuendInstant, subtrahendInstant); 143 } 144 145 public long getUnitMillis() { 146 return iField.getUnitMillis(); 147 } 148 149 public int compareTo(DurationField durationField) { 150 return iField.compareTo(durationField); 151 } 152 153 public boolean equals(Object obj) { 154 if (obj instanceof DelegatedDurationField) { 155 return iField.equals(((DelegatedDurationField) obj).iField); 156 } 157 return false; 158 } 159 160 public int hashCode() { 161 return iField.hashCode() ^ iType.hashCode(); 162 } 163 164 public String toString() { 165 return (iType == null) ? iField.toString() : 166 ("DurationField[" + iType + ']'); 167 } 168 169 }