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Java > Open Source Codes > org > joda > time > chrono > BasicDayOfMonthDateTimeField


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.DateTimeFieldType;
19 import org.joda.time.DurationField;
20 import org.joda.time.ReadablePartial;
21 import org.joda.time.field.PreciseDurationDateTimeField;
22
23 /**
24  * Provides time calculations for the day of the month component of time.
25  *
26  * @author Guy Allard
27  * @author Stephen Colebourne
28  * @author Brian S O'Neill
29  * @since 1.1, refactored from GJDayOfMonthDateTimeField
30  */
31 final class BasicDayOfMonthDateTimeField extends PreciseDurationDateTimeField {
32
33     private static final long serialVersionUID = -4677223814028011723L;
34
35     private final BasicChronology iChronology;
36
37     /**
38      * Restricted constructor.
39      */
40     BasicDayOfMonthDateTimeField(BasicChronology chronology, DurationField days) {
41         super(DateTimeFieldType.dayOfMonth(), days);
42         iChronology = chronology;
43     }
44
45     //-----------------------------------------------------------------------
46 public int get(long instant) {
47         return iChronology.getDayOfMonth(instant);
48     }
49
50     public DurationField getRangeDurationField() {
51         return iChronology.months();
52     }
53
54     public int getMinimumValue() {
55         return 1;
56     }
57
58     public int getMaximumValue() {
59         return iChronology.getDaysInMonthMax();
60     }
61
62     public int getMaximumValue(long instant) {
63         return iChronology.getDaysInMonthMax(instant);
64     }
65
66     public int getMaximumValue(ReadablePartial partial) {
67         if (partial.isSupported(DateTimeFieldType.monthOfYear())) {
68             int month = partial.get(DateTimeFieldType.monthOfYear());
69             if (partial.isSupported(DateTimeFieldType.year())) {
70                 int year = partial.get(DateTimeFieldType.year());
71                 return iChronology.getDaysInYearMonth(year, month);
72             }
73             return iChronology.getDaysInMonthMax(month);
74         }
75         return getMaximumValue();
76     }
77
78     public int getMaximumValue(ReadablePartial partial, int[] values) {
79         int size = partial.size();
80         for (int i = 0; i < size; i++) {
81             if (partial.getFieldType(i) == DateTimeFieldType.monthOfYear()) {
82                 int month = values[i];
83                 for (int j = 0; j < size; j++) {
84                     if (partial.getFieldType(j) == DateTimeFieldType.year()) {
85                         int year = values[j];
86                         return iChronology.getDaysInYearMonth(year, month);
87                     }
88                 }
89                 return iChronology.getDaysInMonthMax(month);
90             }
91         }
92         return getMaximumValue();
93     }
94
95     protected int getMaximumValueForSet(long instant, int value) {
96         return iChronology.getDaysInMonthMaxForSet(instant, value);
97     }
98
99     /**
100      * Serialization singleton
101      */
102     private Object JavaDoc readResolve() {
103         return iChronology.dayOfMonth();
104     }
105 }
106
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