1   /* Copyright 2002-2023 CS GROUP
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.orekit.time;
18  
19  import org.hipparchus.CalculusFieldElement;
20  
21  /** International Atomic Time.
22   * <p>This is intended to be accessed thanks to {@link TimeScales},
23   * so there is no public constructor.</p>
24   * @author Luc Maisonobe
25   * @see AbsoluteDate
26   */
27  public class TAIScale implements TimeScale {
28  
29      /** Serializable UID. */
30      private static final long serialVersionUID = 20131209L;
31  
32      /** Package private constructor for the factory.
33       */
34      TAIScale() {
35      }
36  
37      /** {@inheritDoc} */
38      @Override
39      public double offsetFromTAI(final AbsoluteDate taiTime) {
40          return 0;
41      }
42  
43      /** {@inheritDoc} */
44      @Override
45      public <T extends CalculusFieldElement<T>> T offsetFromTAI(final FieldAbsoluteDate<T> date) {
46          return date.getField().getZero();
47      }
48  
49      /** {@inheritDoc} */
50      @Override
51      public double offsetToTAI(final DateComponents date, final TimeComponents time) {
52          return 0;
53      }
54  
55      /** {@inheritDoc} */
56      public String getName() {
57          return "TAI";
58      }
59  
60      /** {@inheritDoc} */
61      public String toString() {
62          return getName();
63      }
64  
65  }