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1   /*
2    * Portions of this software was developed by employees of the National Institute
3    * of Standards and Technology (NIST), an agency of the Federal Government and is
4    * being made available as a public service. Pursuant to title 17 United States
5    * Code Section 105, works of NIST employees are not subject to copyright
6    * protection in the United States. This software may be subject to foreign
7    * copyright. Permission in the United States and in foreign countries, to the
8    * extent that NIST may hold copyright, to use, copy, modify, create derivative
9    * works, and distribute this software and its documentation without fee is hereby
10   * granted on a non-exclusive basis, provided that this notice and disclaimer
11   * of warranty appears in all copies.
12   *
13   * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
14   * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
15   * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
16   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
17   * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
18   * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
19   * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
20   * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
21   * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
22   * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
23   * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
24   * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
25   */
26  
27  package gov.nist.secauto.metaschema.databind.io;
28  
29  import java.util.Arrays;
30  import java.util.List;
31  import java.util.Locale;
32  import java.util.stream.Collectors;
33  
34  import edu.umd.cs.findbugs.annotations.NonNull;
35  import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
36  
37  /**
38   * Selections of serialization formats.
39   */
40  public enum Format {
41    /**
42     * The <a href="https://www.w3.org/XML/">Extensible Markup Language</a> format.
43     */
44    XML(".xml"),
45    /**
46     * The <a href="https://www.json.org/">JavaScript Object Notation</a> format.
47     */
48    JSON(".json"),
49    /**
50     * The <a href="https://yaml.org/">YAML Ain't Markup Language</a> format.
51     */
52    YAML(".yml");
53  
54    private static final List<String> NAMES;
55  
56    @NonNull
57    private final String defaultExtension;
58  
59    static {
60      NAMES = Arrays.stream(values())
61          .map(format -> format.name().toLowerCase(Locale.ROOT))
62          .collect(Collectors.toUnmodifiableList());
63    }
64  
65    /**
66     * Get a list of all format names in lowercase.
67     *
68     * @return the list of names
69     */
70    @SuppressFBWarnings(value = "MS_EXPOSE_REP", justification = "Exposes names provided by the enum")
71    public static List<String> names() {
72      return NAMES;
73    }
74  
75    Format(@NonNull String defaultExtension) {
76      this.defaultExtension = defaultExtension;
77    }
78  
79    /**
80     * Get the default extension to use for the format.
81     *
82     * @return the default extension
83     */
84    @NonNull
85    public String getDefaultExtension() {
86      return defaultExtension;
87    }
88  }