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.rinex.navigation.parsers;
18  
19  import org.orekit.files.rinex.navigation.RinexNavigation;
20  import org.orekit.files.rinex.navigation.RinexNavigationParser;
21  import org.orekit.files.rinex.navigation.SbasId;
22  import org.orekit.files.rinex.navigation.SystemTimeOffsetMessage;
23  import org.orekit.files.rinex.navigation.UtcId;
24  import org.orekit.files.rinex.utils.ParsingUtils;
25  import org.orekit.gnss.PredefinedTimeSystem;
26  import org.orekit.utils.units.Unit;
27  
28  /** Parser for system time offset.
29   * @author Luc Maisonobe
30   * @since 14.0
31   */
32  public class SystemTimeOffsetParser extends RecordLineParser {
33  
34      /** Container for parsing data. */
35      private final ParseInfo parseInfo;
36  
37      /** Container for system time offset message. */
38      private final SystemTimeOffsetMessage message;
39  
40      /** Simple constructor.
41       * @param parseInfo container for parsing data
42       * @param message container for navigation message
43       */
44      public SystemTimeOffsetParser(final ParseInfo parseInfo, final SystemTimeOffsetMessage message) {
45          this.parseInfo = parseInfo;
46          this.message   = message;
47      }
48  
49      /** {@inheritDoc} */
50      @Override
51      public void parseLine00() {
52  
53          final String defTS = ParsingUtils.parseString(parseInfo.getLine(), 24, 2);
54          final String refTS = ParsingUtils.parseString(parseInfo.getLine(), 26, 2);
55          final String sbas  = ParsingUtils.parseString(parseInfo.getLine(), 43, 18);
56          final String utc   = ParsingUtils.parseString(parseInfo.getLine(), 62, 18);
57  
58          message.setDefinedTimeSystem(PredefinedTimeSystem.parseTwoLettersCode(defTS));
59          message.setReferenceTimeSystem(PredefinedTimeSystem.parseTwoLettersCode(refTS));
60          message.setSbasId(sbas == null || sbas.isEmpty() ? null : SbasId.valueOf(sbas));
61          message.setUtcId(utc == null || utc.isEmpty() ? null : UtcId.parseUtcId(utc));
62          message.setReferenceEpoch(parseInfo.parseDate(message.getSystem()));
63  
64      }
65  
66      /** {@inheritDoc} */
67      @Override
68      public void parseLine01() {
69          message.setTransmissionTime(parseInfo.parseDouble1(Unit.SECOND));
70          message.setA0(parseInfo.parseDouble2(Unit.SECOND));
71          message.setA1(parseInfo.parseDouble3(RinexNavigationParser.S_PER_S));
72          message.setA2(parseInfo.parseDouble4(RinexNavigationParser.S_PER_S2));
73          parseInfo.closePendingRecord();
74      }
75  
76      /** {@inheritDoc} */
77      @Override
78      public void closeRecord(final RinexNavigation file) {
79          file.addSystemTimeOffset(message);
80      }
81  
82  }