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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.swid.swidval;
28  
29  import gov.nist.secauto.decima.core.requirement.DefaultRequirementsManager;
30  import gov.nist.secauto.decima.core.requirement.RequirementsManager;
31  import gov.nist.secauto.decima.core.requirement.RequirementsParserException;
32  import gov.nist.secauto.decima.xml.requirement.XMLRequirementsParser;
33  
34  import org.jdom2.JDOMException;
35  import org.xml.sax.SAXException;
36  
37  import java.net.MalformedURLException;
38  import java.net.URISyntaxException;
39  import java.net.URL;
40  import java.util.Collections;
41  
42  import javax.xml.transform.stream.StreamSource;
43  
44  public class SWIDRequirementsManager extends DefaultRequirementsManager {
45    private static SWIDRequirementsManager INSTANCE;
46  
47    /**
48     * Retrieves a global instance.
49     * 
50     * @return a {@link RequirementsManager} instance with the SWID requirements pre-loaded
51     */
52    public static synchronized SWIDRequirementsManager getInstance() {
53      if (INSTANCE == null) {
54        INSTANCE = new SWIDRequirementsManager();
55      }
56      return INSTANCE;
57    }
58  
59    /**
60     * Constructs a new {@link RequirementsManager} with the SWID requirements pre-loaded.
61     */
62    public SWIDRequirementsManager() {
63      try {
64        load(new URL("classpath:requirements.xml"), new XMLRequirementsParser(
65            Collections.singletonList(new StreamSource("classpath:swid-requirements-ext.xsd"))));
66      } catch (URISyntaxException | MalformedURLException | RequirementsParserException | JDOMException
67          | SAXException ex) {
68        throw new RuntimeException(ex);
69      }
70    }
71  
72  }