1   /* Copyright 2002-2025 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  /** This interface represents objects that can be shifted in time.
20   * @param <T> Type of the object.
21   * @author Luc Maisonobe
22   */
23  public interface TimeShiftable<T extends TimeShiftable<T>> {
24  
25      /** Get a time-shifted instance.
26       * @param dt time shift in seconds
27       * @return a new instance, shifted with respect to instance (which is not changed)
28       */
29      T shiftedBy(double dt);
30  
31      /** Get a time-shifted instance.
32       * @param dt time shift
33       * @return a new instance, shifted with respect to instance (which is not changed)
34       * @since 13.0
35       */
36      default T shiftedBy(TimeOffset dt) {
37          return shiftedBy(dt.toDouble());
38      }
39  
40  }