return null;
        }

        @Override
        public Map<String, String[]> getParameterMap() {
            return null;
        }

        @Override
        public String getProtocol() {
            return null;
        }

        @Override
        public String getScheme() {
            return null;
        }

        @Override
        public String getServerName() {

      assertThat(urls.get(0).getProtocol()).isEqualTo("file");
      assertThat(urls.get(0).getAuthority()).isNull();
      assertThat(urls.get(0).getPath()).endsWith("/relative/path/to/some.jar");

      assertThat(urls.get(1)).isEqualTo(new URL("file:///absolute/path/to/some.jar"));

      assertThat(urls.get(2).getProtocol()).isEqualTo("file");
      assertThat(urls.get(2).getAuthority()).isNull();

        }

        @Override
        public java.util.Map<String, String[]> getParameterMap() {
            return new java.util.HashMap<>();
        }

        @Override
        public String getProtocol() {
            return "HTTP/1.1";
        }

        @Override
        public String getScheme() {
            return "http";
        }

        @Override

            }

            @Override
            public java.util.Map<String, String[]> getParameterMap() {
                return null;
            }

            @Override
            public String getProtocol() {
                return null;
            }

            @Override
            public String getScheme() {
                return null;
            }

            @Override

            }

            @Override
            public java.util.Map<String, String[]> getParameterMap() {
                return null;
            }

            @Override
            public String getProtocol() {
                return null;
            }

            @Override
            public String getScheme() {
                return null;
            }

            @Override

                    paramMap.put(entry.getKey(), new String[] { entry.getValue() });
                }
            }
            return paramMap;
        }

        @Override
        public String getProtocol() {
            throw new UnsupportedOperationException();
        }

        @Override
        public String getScheme() {
            throw new UnsupportedOperationException();
        }

     */
    protected String normalizeCanonicalUrl(final String baseUrl, final String canonicalUrl) {
        try {
            final URL u = new URL(baseUrl);
            return new URL(u, canonicalUrl.startsWith(":") ? u.getProtocol() + canonicalUrl : canonicalUrl).toString();
        } catch (final MalformedURLException e) {
            logger.warn("Invalid canonical url: {} : {}", baseUrl, canonicalUrl, e);
        }
        return null;
    }

        }

        @Override
        public java.util.Map<String, String[]> getParameterMap() {
            return new java.util.HashMap<>();
        }

        @Override
        public String getProtocol() {
            return "HTTP/1.1";
        }

        @Override
        public String getScheme() {
            return "http";
        }

        @Override