SWIDRequirementsManager.java

/**
 * Portions of this software was developed by employees of the National Institute
 * of Standards and Technology (NIST), an agency of the Federal Government and is
 * being made available as a public service. Pursuant to title 17 United States
 * Code Section 105, works of NIST employees are not subject to copyright
 * protection in the United States. This software may be subject to foreign
 * copyright. Permission in the United States and in foreign countries, to the
 * extent that NIST may hold copyright, to use, copy, modify, create derivative
 * works, and distribute this software and its documentation without fee is hereby
 * granted on a non-exclusive basis, provided that this notice and disclaimer
 * of warranty appears in all copies.
 *
 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
 */

package gov.nist.secauto.swid.swidval;

import gov.nist.secauto.decima.core.requirement.DefaultRequirementsManager;
import gov.nist.secauto.decima.core.requirement.RequirementsManager;
import gov.nist.secauto.decima.core.requirement.RequirementsParserException;
import gov.nist.secauto.decima.xml.requirement.XMLRequirementsParser;

import org.jdom2.JDOMException;
import org.xml.sax.SAXException;

import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Collections;

import javax.xml.transform.stream.StreamSource;

public class SWIDRequirementsManager extends DefaultRequirementsManager {
  private static SWIDRequirementsManager INSTANCE;

  /**
   * Retrieves a global instance.
   * 
   * @return a {@link RequirementsManager} instance with the SWID requirements pre-loaded
   */
  public static synchronized SWIDRequirementsManager getInstance() {
    if (INSTANCE == null) {
      INSTANCE = new SWIDRequirementsManager();
    }
    return INSTANCE;
  }

  /**
   * Constructs a new {@link RequirementsManager} with the SWID requirements pre-loaded.
   */
  public SWIDRequirementsManager() {
    try {
      load(new URL("classpath:requirements.xml"), new XMLRequirementsParser(
          Collections.singletonList(new StreamSource("classpath:swid-requirements-ext.xsd"))));
    } catch (URISyntaxException | MalformedURLException | RequirementsParserException | JDOMException
        | SAXException ex) {
      throw new RuntimeException(ex);
    }
  }

}