public BiDiGzipFilter build() {
    final BiDiGzipFilter filter = new BiDiGzipFilter();
    filter.setMinGzipSize((int) minimumEntitySize.toBytes());

    filter.setBufferSize((int) bufferSize.toBytes());

    filter.setDeflateCompressionLevel(deflateCompressionLevel);

    if (excludedUserAgents != null) {
      filter.setExcludedAgents(excludedUserAgents);
    }

    if (compressedMimeTypes != null) {
      filter.setMimeTypes(compressedMimeTypes);
    }

    if (includedMethods != null) {
      filter.setMethods(includedMethods);
    }

    if (excludedUserAgentPatterns != null) {
      filter.setExcludedAgentPatterns(excludedUserAgentPatterns);
    }

    if (vary != null) {
      filter.setVary(vary);
    }

    filter.setDeflateNoWrap(gzipCompatibleDeflation);

    return filter;
  }
public class GzipFilterFactory {
  private boolean enabled = true;

  @NotNull private Size minimumEntitySize = Size.bytes(256);

  @NotNull private Size bufferSize = Size.kilobytes(8);

  private Set<String> excludedUserAgents = Sets.newHashSet();
  private Set<Pattern> excludedUserAgentPatterns = Sets.newHashSet();
  private Set<String> compressedMimeTypes = Sets.newHashSet();
  private Set<String> includedMethods = Sets.newHashSet();
  private boolean gzipCompatibleDeflation = true;
  private String vary = "Accept-Encoding";

  @Min(Deflater.DEFAULT_COMPRESSION)
  @Max(Deflater.BEST_COMPRESSION)
  private int deflateCompressionLevel = Deflater.DEFAULT_COMPRESSION;

  @JsonProperty
  public boolean isEnabled() {
    return enabled;
  }

  @JsonProperty
  public void setEnabled(boolean enabled) {
    this.enabled = enabled;
  }

  @JsonProperty
  public Size getMinimumEntitySize() {
    return minimumEntitySize;
  }

  @JsonProperty
  public void setMinimumEntitySize(Size size) {
    this.minimumEntitySize = checkNotNull(size);
  }

  @JsonProperty
  public Size getBufferSize() {
    return bufferSize;
  }

  @JsonProperty
  public void setBufferSize(Size size) {
    this.bufferSize = checkNotNull(size);
  }

  @JsonProperty
  public Set<String> getExcludedUserAgents() {
    return excludedUserAgents;
  }

  @JsonProperty
  public void setExcludedUserAgents(Set<String> userAgents) {
    this.excludedUserAgents = userAgents;
  }

  @JsonProperty
  public Set<String> getCompressedMimeTypes() {
    return compressedMimeTypes;
  }

  @JsonProperty
  public void setCompressedMimeTypes(Set<String> mimeTypes) {
    this.compressedMimeTypes = mimeTypes;
  }

  @JsonProperty
  public int getDeflateCompressionLevel() {
    return deflateCompressionLevel;
  }

  @JsonProperty
  public void setDeflateCompressionLevel(int level) {
    this.deflateCompressionLevel = level;
  }

  @JsonProperty
  public boolean isGzipCompatibleDeflation() {
    return gzipCompatibleDeflation;
  }

  @JsonProperty
  public void setGzipCompatibleDeflation(boolean compatible) {
    this.gzipCompatibleDeflation = compatible;
  }

  @JsonProperty
  public Set<Pattern> getExcludedUserAgentPatterns() {
    return excludedUserAgentPatterns;
  }

  @JsonProperty
  public void setExcludedUserAgentPatterns(Set<Pattern> patterns) {
    this.excludedUserAgentPatterns = patterns;
  }

  @JsonProperty
  public Set<String> getIncludedMethods() {
    return includedMethods;
  }

  @JsonProperty
  public void setIncludedMethods(Set<String> methods) {
    this.includedMethods = methods;
  }

  @JsonProperty
  public String getVary() {
    return vary;
  }

  @JsonProperty
  public void setVary(String vary) {
    this.vary = vary;
  }

  public BiDiGzipFilter build() {
    final BiDiGzipFilter filter = new BiDiGzipFilter();
    filter.setMinGzipSize((int) minimumEntitySize.toBytes());

    filter.setBufferSize((int) bufferSize.toBytes());

    filter.setDeflateCompressionLevel(deflateCompressionLevel);

    if (excludedUserAgents != null) {
      filter.setExcludedAgents(excludedUserAgents);
    }

    if (compressedMimeTypes != null) {
      filter.setMimeTypes(compressedMimeTypes);
    }

    if (includedMethods != null) {
      filter.setMethods(includedMethods);
    }

    if (excludedUserAgentPatterns != null) {
      filter.setExcludedAgentPatterns(excludedUserAgentPatterns);
    }

    if (vary != null) {
      filter.setVary(vary);
    }

    filter.setDeflateNoWrap(gzipCompatibleDeflation);

    return filter;
  }
}