1   /* Copyright 2002-2021 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.adm;
18  
19  import java.util.Collections;
20  import java.util.List;
21  
22  import org.orekit.files.ccsds.utils.lexical.ParseToken;
23  import org.orekit.files.ccsds.utils.lexical.TokenType;
24  import org.orekit.files.ccsds.utils.lexical.XmlTokenBuilder;
25  import org.orekit.utils.units.Unit;
26  import org.orekit.utils.units.UnitsCache;
27  import org.xml.sax.Attributes;
28  
29  /** Builder for rotation angles and rates.
30   * <p>
31   * Instances of this class are immutable.
32   * </p>
33   * @author Luc Maisonobe
34   * @since 11.0
35   */
36  public class RotationXmlTokenBuilder implements XmlTokenBuilder {
37  
38      /** Attribute defining rotation angle. */
39      private static final String ANGLE = "angle";
40  
41      /** Attribute defining rotation rate. */
42      private static final String RATE = "rate";
43  
44      /** Attribute name for units. */
45      private static final String UNITS = "units";
46  
47      /** Cache for parsed units. */
48      private final UnitsCache cache;
49  
50      /** Simple constructor.
51       */
52      public RotationXmlTokenBuilder() {
53          this.cache = new UnitsCache();
54      }
55  
56      /** {@inheritDoc} */
57      @Override
58      public List<ParseToken> buildTokens(final boolean startTag, final String qName,
59                                          final String content, final Attributes attributes,
60                                          final int lineNumber, final String fileName) {
61  
62          // get the token name from the first attribute found
63          String name = attributes.getValue(ANGLE);
64          if (name == null) {
65              name = attributes.getValue(RATE);
66          }
67  
68          // elaborate the token type
69          final TokenType type = (content == null) ? (startTag ? TokenType.START : TokenType.STOP) : TokenType.ENTRY;
70  
71          // get units
72          final Unit units = cache.getUnits(attributes.getValue(UNITS));
73  
74          // final build
75          final ParseToken token = new ParseToken(type, name, content, units, lineNumber, fileName);
76  
77          return Collections.singletonList(token);
78  
79      }
80  
81  }