1   /* Copyright 2024-2025 The Johns Hopkins University Applied Physics Laboratory
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.iirv.terms;
18  
19  import org.hipparchus.util.FastMath;
20  import org.orekit.files.iirv.terms.base.LongValuedIIRVTerm;
21  
22  /**
23   * 13-character signed component of a position vector.
24   * <p>
25   * Units: m
26   * <p>
27   * Valid values:
28   * <ul>
29   * <li> Character 1: ' ' or '-'
30   * <li> Character 2-12: Any integer 0-9
31   * </ul>
32   *
33   * @author Nick LaFarge
34   * @since 13.0
35   */
36  public class PositionVectorComponentTerm extends LongValuedIIRVTerm {
37  
38      /** The length of the IIRV term within the message. */
39      public static final int POSITION_VECTOR_COMPONENT_TERM_LENGTH = 13;
40  
41      /** Regular expression that ensures the validity of string values for this term. */
42      public static final String POSITION_VECTOR_COMPONENT_TERM_PATTERN = "( |-)\\d{12}";
43  
44      /**
45       * Constructor.
46       * <p>
47       * See {@link LongValuedIIRVTerm#LongValuedIIRVTerm(String, long, int, boolean)}
48       *
49       * @param value value of the position vector component
50       */
51      public PositionVectorComponentTerm(final long value) {
52          super(POSITION_VECTOR_COMPONENT_TERM_PATTERN, value, POSITION_VECTOR_COMPONENT_TERM_LENGTH, true);
53      }
54  
55      /**
56       * Constructor.
57       * <p>
58       * See {@link LongValuedIIRVTerm#LongValuedIIRVTerm(String, String, int, boolean)}
59       *
60       * @param value value of the position vector component
61       */
62      public PositionVectorComponentTerm(final String value) {
63          super(POSITION_VECTOR_COMPONENT_TERM_PATTERN, value, POSITION_VECTOR_COMPONENT_TERM_LENGTH, true);
64      }
65  
66      /**
67       * Initializes a PositionVectorComponentTerm by rounding a floating point number to the nearest integer.
68       * See {@link LongValuedIIRVTerm#LongValuedIIRVTerm(String, long, int, boolean)}
69       *
70       * @param value value of the position vector component
71       */
72      public PositionVectorComponentTerm(final double value) {
73          super(POSITION_VECTOR_COMPONENT_TERM_PATTERN, FastMath.round(value), POSITION_VECTOR_COMPONENT_TERM_LENGTH, true);
74      }
75  }