*
 * @author Colin Decker
 */
@NullUnmarked
public class SourceSinkFactories {

  private SourceSinkFactories() {}

  public static CharSourceFactory stringCharSourceFactory() {
    return new StringSourceFactory();
  }

  public static ByteSourceFactory byteArraySourceFactory() {
    return new ByteArraySourceFactory();
  }

  public static ByteSourceFactory emptyByteSourceFactory() {

    /** The login required setting. */
    public String loginRequired;

    /** The ignore failure type setting. */
    public String ignoreFailureType;

    /** The failure count threshold setting. */
    public String failureCountThreshold;

    /** The popular word setting. */
    public String popularWord;

    /** The CSV file encoding setting. */
    public String csvFileEncoding;

        checkSpecifiedProperty("queryTime");
        return queryTime;
    }

    public void setQueryTime(Long value) {
        registerModifiedProperty("queryTime");
        this.queryTime = value;
    }

    public String getReferer() {
        checkSpecifiedProperty("referer");
        return convertEmptyToNull(referer);
    }

    public void setReferer(String value) {

        public String getDescription() {
            return description;
        }
    }

    public static class Build {}

    public static class Dependency {
        private String artifactId;

        public String getArtifactId() {
            return artifactId;
        }

        public void setArtifactId(String id) {
            artifactId = id;
        }
    }

    }

    @Override public void proxySelectStart(Call call, HttpUrl url) {
      printEvent("proxySelectStart");
    }

    @Override public void proxySelectEnd(Call call, HttpUrl url, List<Proxy> proxies) {
      printEvent("proxySelectEnd");
    }

    @Override public void callStart(Call call) {
      printEvent("callStart");
    }

    @Override public void dnsStart(Call call, String domainName) {

    }

    @Override
    public boolean isOffline() {
        return offline;
    }

    @Override
    public ArtifactResolutionRequest setOffline(boolean offline) {
        this.offline = offline;

        return this;
    }

    @Override
    public boolean isForceUpdate() {
        return forceUpdate;
    }

    @Override

        public void columnBoost() {
            doColumn("boost");
        }

        public void columnCreatedBy() {
            doColumn("createdBy");
        }

        public void columnCreatedTime() {
            doColumn("createdTime");
        }

        public void columnDescription() {
            doColumn("description");
        }

        public void columnHandlerName() {

        }

        @Override
        public void disconnect() {
            // Do Nothing
        }

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

        @Override
        public void connect() throws IOException {
            // Do Nothing
        }

        @Override
        public int getResponseCode() throws IOException {
            return 200;

  }

  public void testOf() {
    assertThat(Optional.of("training").get()).isEqualTo("training");
  }

  public void testOf_null() {
    assertThrows(NullPointerException.class, () -> Optional.of(null));
  }

  public void testFromNullable() {
    Optional<String> optionalName = Optional.fromNullable("bob");
    assertThat(optionalName.get()).isEqualTo("bob");
  }

  public void testFromNullable_null() {

    private MetadataGraph resolvedTree;

    public Artifact getOriginatingArtifact() {
        return originatingArtifact;
    }

    public MetadataResolutionResult listOriginatingArtifact(final Artifact originatingArtifact) {
        this.originatingArtifact = originatingArtifact;

        return this;
    }

    public void addArtifact(Artifact artifact) {
        if (artifacts == null) {