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.utils;
18  
19  import java.io.IOException;
20  import java.io.InputStream;
21  import java.util.Properties;
22  
23  /** Utility class for setting global configuration parameters.
24  
25   * @author Luc Maisonobe
26   */
27  public class OrekitConfiguration {
28  
29      /** Number of slots to use in caches. */
30      private static int CACHE_SLOTS_NUMBER;
31  
32      static {
33          CACHE_SLOTS_NUMBER = 100;
34      }
35  
36      /** Private constructor.
37       * <p>This class is a utility class, it should neither have a public
38       * nor a default constructor. This private constructor prevents
39       * the compiler from generating one automatically.</p>
40       */
41      private OrekitConfiguration() {
42      }
43  
44      /** Set the number of slots to use in caches.
45       * @param slotsNumber number of slots to use in caches
46       */
47      public static void setCacheSlotsNumber(final int slotsNumber) {
48          OrekitConfiguration.CACHE_SLOTS_NUMBER = slotsNumber;
49      }
50  
51      /** Get the number of slots to use in caches.
52       * @return number of slots to use in caches
53       */
54      public static int getCacheSlotsNumber() {
55          return CACHE_SLOTS_NUMBER;
56      }
57  
58      /**
59       * Get Orekit version.
60       * <p>
61       * The version is automatically retrieved from a properties file generated
62       * at maven compilation time. When using an IDE not configured to use
63       * maven, then a default value {@code "unknown"} will be returned.
64       * </p>
65       * @return Orekit version
66       * @since 13.0
67       */
68      public static String getOrekitVersion() {
69          String version = "unknown";
70          final Properties properties = new Properties();
71          try (InputStream stream = OrekitConfiguration.class.getResourceAsStream("/assets/org/orekit/orekit.properties")) {
72              if (stream != null) {
73                  properties.load(stream);
74                  version = properties.getProperty("orekit.version", version);
75              }
76          } catch (IOException ioe) {
77              // ignored
78          }
79          return version;
80      }
81  
82  }