1   /* Copyright 2013-2025 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.rugged.utils;
18  
19  
20  /** Class for selecting one value among two.
21   * @see MinSelector
22   * @see MaxSelector
23   * @author Luc Maisonobe
24   */
25  public abstract class Selector {
26  
27      /** Check if first value should be selected.
28       * @param v1 first value
29       * @param v2 second value
30       * @return true if v1 should be selected
31       */
32      public abstract boolean selectFirst(double v1, double v2);
33  
34      /** Select a value.
35       * @param v1 first value
36       * @param v2 second value
37       * @return selected value
38       */
39      public double select(final double v1, final double v2) {
40          return selectFirst(v1, v2) ? v1 : v2;
41      }
42  
43  }