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Java > Open Source Codes > org > joda > time > field > StrictDateTimeField


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 org.joda.time.DateTimeField;
19
20 /**
21  * Converts a lenient DateTimeField into a strict one. By being strict, the set
22  * throws an IllegalArgumentException if the value is out of bounds.
23  * <p>
24  * StrictDateTimeField is thread-safe and immutable.
25  *
26  * @author Brian S O'Neill
27  * @see org.joda.time.chrono.StrictChronology
28  * @see LenientDateTimeField
29  * @since 1.0
30  */
31 public class StrictDateTimeField extends DelegatedDateTimeField {
32
33     private static final long serialVersionUID = 3154803964207950910L;
34
35     /**
36      * Returns a strict version of the given field. If it is already strict,
37      * then it is returned as-is. Otherwise, a new StrictDateTimeField is
38      * returned.
39      */
40     public static DateTimeField getInstance(DateTimeField field) {
41         if (field == null) {
42             return null;
43         }
44         if (field instanceof LenientDateTimeField) {
45             field = ((LenientDateTimeField)field).getWrappedField();
46         }
47         if (!field.isLenient()) {
48             return field;
49         }
50         return new StrictDateTimeField(field);
51     }
52
53     protected StrictDateTimeField(DateTimeField field) {
54         super(field);
55     }
56
57     public final boolean isLenient() {
58         return false;
59     }
60
61     /**
62      * Does a bounds check before setting the value.
63      *
64      * @throws IllegalArgumentException if the value is invalid
65      */
66     public long set(long instant, int value) {
67         FieldUtils.verifyValueBounds
68             (this, value, getMinimumValue(instant), getMaximumValue(instant));
69         return super.set(instant, value);
70     }
71 }
72
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