if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())
          && Modifier.isFinal(field.getModifiers())) {
        if (field.getGenericType() == field.getType() && type.isAssignableFrom(field.getType())) {
          field.setAccessible(true);
          try {
            T constant = type.cast(field.get(null));
            if (constant != null) {
              return constant;
            }

    }

    /**
     * Gets the type flags of this security descriptor.
     *
     * @return the type flags indicating security descriptor control flags
     */
    public final int getType() {
        return this.type;
    }

    /**
     * Gets the access control entries (ACEs) from this security descriptor.
     *
     * @return the array of access control entries
     */

                            md.getGroupId(),
                            md.getArtifactId(),
                            edge.getVersion(),
                            md.getType(),
                            md.getScopeAsEnum(),
                            md.getClassifier(),
                            edge.getArtifactUri(),
                            edge.getSource() == null

     */
    private String encodeId(final String objectName) {
        if (objectName == null) {
            return StringUtil.EMPTY;
        }
        return new String(Base64.getUrlEncoder().encode(objectName.getBytes(Constants.UTF_8_CHARSET)), Constants.UTF_8_CHARSET);
    }

                    outputFile.createNewFile();
                }
                // Write some dummy content to simulate actual thumbnail
                Files.write(outputFile.toPath(), ("thumbnail-" + thumbnailId).getBytes());
                return true;
            } catch (IOException e) {
                return false;
            }
        }

        @Override

     */
    private PacMac() {
        // Utility class
    }

    /**
     *
     */
    private static final String HMAC_KEY = "HMAC";
    private static final byte[] MD5_CONSTANT = "signaturekey\0".getBytes(StandardCharsets.US_ASCII);
    private static final byte[] ZERO_IV = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

    /**
     * Calculates a MAC using the ARCFOUR-HMAC-MD5 algorithm.

     */
    private String encodeId(final String objectName) {
        if (objectName == null) {
            return StringUtil.EMPTY;
        }
        return new String(Base64.getUrlEncoder().encode(objectName.getBytes(Constants.UTF_8_CHARSET)), Constants.UTF_8_CHARSET);
    }

        sb.append('-').append(artifact.getBaseVersion());
        if (artifact.getClassifier() != null) {
            sb.append('-').append(artifact.getClassifier());
        }
        sb.append('.').append(artifact.getType()).append(LAST_UPDATE_TAG);
        return new File(artifact.getFile().getParentFile(), sb.toString());
    }

    File getTouchfile(RepositoryMetadata metadata, File file) {

  }

  public void testToByteArray() throws IOException {
    URL resource = getClass().getResource("testdata/i18n.txt");
    assertThat(Resources.toByteArray(resource)).isEqualTo(I18N.getBytes(UTF_8));
  }

  public void testReadLines() throws IOException {
    // TODO(chrisn): Check in a better resource
    URL resource = getClass().getResource("testdata/i18n.txt");

            return null;
        }

        @Override
        public boolean isIPC() {
            return false;
        }

        @Override
        public int getType() {
            return 0;
        }

        @Override
        public boolean isWorkgroup() {
            return false;
        }

        @Override
        public boolean isRoot() {