1   /* Contributed in the public domain.
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.frames;
18  
19  import java.io.IOException;
20  import java.io.InputStream;
21  import java.util.ArrayList;
22  import java.util.List;
23  
24  import org.orekit.data.DataLoader;
25  import org.orekit.data.DataSource;
26  
27  /**
28   * Implementation of {@link DataLoader} based on {@link EopHistoryLoader.Parser} that
29   * loads all files and compiles the results into one data structure.
30   *
31   * @author Evan Ward
32   * @since 10.1
33   */
34  class EopParserLoader implements DataLoader {
35  
36      /** Parser for EOP data files. */
37      private final EopHistoryLoader.Parser parser;
38  
39      /** History entries. */
40      private final List<EOPEntry> history;
41  
42      /**
43       * Create a {@link DataLoader} based on a {@link EopHistoryLoader.Parser}. Loads
44       * all EOP data into a single collection.
45       *
46       * @param parser for the EOP data files.
47       */
48      EopParserLoader(final EopHistoryLoader.Parser parser) {
49          this.parser = parser;
50          this.history = new ArrayList<>();
51      }
52  
53      /**
54       * Get the parsed EOP entries.
55       *
56       * @return the parsed EOP data. The returned collection is a reference, not a
57       * copy. It is not guaranteed to be sorted.
58       */
59      public List<EOPEntry> getEop() {
60          return history;
61      }
62  
63      /** {@inheritDoc} */
64      public boolean stillAcceptsData() {
65          return true;
66      }
67  
68      @Override
69      public void loadData(final InputStream input, final String name) throws IOException {
70          history.addAll(parser.parse(new DataSource(name, () -> input)));
71      }
72  
73  }