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.section;
18  
19  import org.orekit.files.ccsds.utils.FileFormat;
20  import org.orekit.files.ccsds.utils.lexical.ParseToken;
21  import org.orekit.files.ccsds.utils.lexical.TokenType;
22  import org.orekit.files.ccsds.utils.parsing.AbstractConstituentParser;
23  
24  /** Keys for {@link FileFormat#KVN} format structure.
25   * @author Luc Maisonobe
26   * @since 11.0
27   */
28  public enum KvnStructureKey {
29  
30      /** Metadata structure. */
31      META((token, parser) -> {
32          if (token.getType() == TokenType.START) {
33              return parser.prepareMetadata();
34          } else if (token.getType() == TokenType.STOP) {
35              return parser.finalizeMetadata();
36          }
37          return false;
38      }),
39  
40      /** Data structure. */
41      DATA((token, parser) -> {
42          if (token.getType() == TokenType.START) {
43              return parser.prepareData();
44          } else if (token.getType() == TokenType.STOP) {
45              return parser.finalizeData();
46          }
47          return false;
48      });
49  
50      /** Processing method. */
51      private final transient TokenProcessor processor;
52  
53      /** Simple constructor.
54       * @param processor processing method
55       */
56      KvnStructureKey(final TokenProcessor processor) {
57          this.processor = processor;
58      }
59  
60      /** Process an token.
61       * @param token token to process
62           * @param parser file parser
63       * @return true of token was accepted
64       */
65      public boolean process(final ParseToken token, final AbstractConstituentParser<?, ?, ?> parser) {
66          return processor.process(token, parser);
67      }
68  
69      /** Interface for processing one token. */
70      interface TokenProcessor {
71          /** Process one token.
72           * @param token token to process
73           * @param parser file parser
74           * @return true of token was accepted
75           */
76          boolean process(ParseToken token, AbstractConstituentParser<?, ?, ?> parser);
77      }
78  
79  }