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.PeriodType;
20 import org.joda.time.ReadWritablePeriod;
21 import org.joda.time.ReadablePeriod;
22
23 /**
24 * ReadablePeriodConverter extracts milliseconds and chronology from a ReadablePeriod.
25 *
26 * @author Stephen Colebourne
27 * @author Brian S O'Neill
28 * @since 1.0
29 */
30 class ReadablePeriodConverter extends AbstractConverter
31 implements PeriodConverter {
32
33 /**
34 * Singleton instance.
35 */
36 static final ReadablePeriodConverter INSTANCE = new ReadablePeriodConverter();
37
38 /**
39 * Restricted constructor.
40 */
41 protected ReadablePeriodConverter() {
42 super();
43 }
44
45 //-----------------------------------------------------------------------
46 /**
47 * Extracts duration values from an object of this converter's type, and
48 * sets them into the given ReadWritablePeriod.
49 *
50 * @param duration duration to get modified
51 * @param object the object to convert, must not be null
52 * @param chrono the chronology to use
53 * @throws NullPointerException if the duration or object is null
54 * @throws ClassCastException if the object is an invalid type
55 * @throws IllegalArgumentException if the object is invalid
56 */
57 public void setInto(ReadWritablePeriod duration, Object object, Chronology chrono) {
58 duration.setPeriod((ReadablePeriod) object);
59 }
60
61 /**
62 * Selects a suitable period type for the given object.
63 *
64 * @param object the object to examine, must not be null
65 * @return the period type from the readable duration
66 * @throws NullPointerException if the object is null
67 * @throws ClassCastException if the object is an invalid type
68 */
69 public PeriodType getPeriodType(Object object) {
70 ReadablePeriod period = (ReadablePeriod) object;
71 return period.getPeriodType();
72 }
73
74 //-----------------------------------------------------------------------
75 /**
76 * Returns ReadablePeriod class.
77 *
78 * @return ReadablePeriod.class
79 */
80 public Class<?> getSupportedType() {
81 return ReadablePeriod.class;
82 }
83
84 }