1   /* Copyright 2002-2019 CS Systèmes d'Information
2    * Licensed to CS Systèmes d'Information (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.RealFieldElement;
20  
21  /** This interface represents a multi-valued function of time.
22   * @author Luc Maisonobe
23   */
24  public interface TimeVectorFunction {
25  
26      /** Compute a function of time.
27       * @param date date
28       * @return value of the function
29       */
30      double[] value(AbsoluteDate date);
31  
32      /** Compute a function of time.
33       * @param date date
34       * @param <T> type of the field elements
35       * @return value of the function
36       */
37      <T extends RealFieldElement<T>> T[] value(FieldAbsoluteDate<T> date);
38  
39  }