1 /*
2 * Copyright 2001-2009 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 }