1   /* Contributed in the public domain.
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.data;
18  
19  import org.orekit.attitudes.InertialProvider;
20  import org.orekit.bodies.LazyLoadedCelestialBodies;
21  import org.orekit.errors.OrekitException;
22  import org.orekit.errors.OrekitMessages;
23  import org.orekit.forces.gravity.potential.LazyLoadedGravityFields;
24  import org.orekit.frames.LazyLoadedFrames;
25  import org.orekit.models.earth.LazyLoadedGeoMagneticFields;
26  import org.orekit.time.AbsoluteDate;
27  import org.orekit.time.LazyLoadedTimeScales;
28  
29  /**
30   * A data context that always throws a runtime exception when it's methods are used. Can
31   * be useful for determining if the default data context is used. E.g. {@code
32   * DataContext.setDefault(new ExceptionalDataContext());}. The following classes have
33   * static fields that are initialized using the default data context:
34   *
35   * <ul>
36   *     <li>{@link AbsoluteDate}
37   *     <li>{@link InertialProvider}
38   * </ul>
39   *
40   * @author Evan Ward
41   * @see DataContext#setDefault(LazyLoadedDataContext)
42   * @since 10.1
43   */
44  public class ExceptionalDataContext extends LazyLoadedDataContext implements DataContext {
45  
46      @Override
47      public LazyLoadedTimeScales getTimeScales() {
48          throw new OrekitException(OrekitMessages.EXCEPTIONAL_DATA_CONTEXT);
49      }
50  
51      @Override
52      public LazyLoadedFrames getFrames() {
53          throw new OrekitException(OrekitMessages.EXCEPTIONAL_DATA_CONTEXT);
54      }
55  
56      @Override
57      public LazyLoadedCelestialBodies getCelestialBodies() {
58          throw new OrekitException(OrekitMessages.EXCEPTIONAL_DATA_CONTEXT);
59      }
60  
61      @Override
62      public LazyLoadedGravityFields getGravityFields() {
63          throw new OrekitException(OrekitMessages.EXCEPTIONAL_DATA_CONTEXT);
64      }
65  
66      @Override
67      public LazyLoadedGeoMagneticFields getGeoMagneticFields() {
68          throw new OrekitException(OrekitMessages.EXCEPTIONAL_DATA_CONTEXT);
69      }
70  
71  }