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.files.ccsds.ndm;
18  
19  import java.util.Collections;
20  import java.util.List;
21  
22  /** CCSDS Navigation Data Message.
23   * This class is a container for comments and {@link NdmConstituent constituents}.
24   * @author Luc Maisonobe
25   * @since 11.0
26   */
27  public class Ndm {
28  
29      /** File comments. */
30      private final List<String> comments;
31  
32      /** Constituents of the message. */
33      private final List<NdmConstituent<?, ?>> constituents;
34  
35      /** Simple constructor.
36       * @param comments file comments
37       * @param constituents constituents of the message
38       */
39      public Ndm(final List<String> comments, final List<NdmConstituent<?, ?>> constituents) {
40          this.comments     = comments;
41          this.constituents = constituents;
42      }
43  
44      /** Get an unmodifiable view of the comments.
45       * @return unmodifiable view of the comment
46       */
47      public List<String> getComments() {
48          return Collections.unmodifiableList(comments);
49      }
50  
51      /** Get an unmodifiable view of the constituents.
52       * @return unmodifiable view of the constituents
53       */
54      public List<NdmConstituent<?, ?>> getConstituents() {
55          return Collections.unmodifiableList(constituents);
56      }
57  
58  }