* Processes CORS headers and handles preflight OPTIONS requests.
 */
public class CorsFilter implements Filter {

    /**
     * Creates a new instance of CorsFilter.
     */
    public CorsFilter() {
        // Default constructor
    }

    private static final Logger logger = LogManager.getLogger(CorsFilter.class);

    /**
     * HTTP OPTIONS method constant used for CORS preflight requests.
     */

    private CorsFilter corsFilter;
    private TestCorsHandlerFactory corsHandlerFactory;
    private TestHttpServletRequest mockRequest;
    private TestHttpServletResponse mockResponse;
    private TestFilterChain mockFilterChain;

    @Override
    protected void setUp(TestInfo testInfo) throws Exception {
        super.setUp(testInfo);
        corsFilter = new CorsFilter();

  <filter>
    <filter-name>loadControlFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.LoadControlFilter</filter-class>
  </filter>

  <filter>
    <filter-name>corsFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.CorsFilter</filter-class>
  </filter>

  <filter>
    <filter-name>webApiFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.WebApiFilter</filter-class>
  </filter>