return dstIndex - start;
    }


    @Override
    protected int writeDataWireFormat ( byte[] dst, int dstIndex ) {
        return 0;
    }


    @Override
    protected int readSetupWireFormat ( byte[] buffer, int bufferIndex, int len ) {
        return 0;
    }


    @Override

        if (recessive == null) {
            return dominant;
        }
        if (dominant == null) {
            return recessive;
        }
        return dominant.merge(recessive, childMergeOverride);
    }

     */
    protected JsonUtil() {
    }

    /**
     * Escapes a value as Json string.
     *
     * @param value input
     * @return escaped string.
     */
    public static String escape(final String value) {
        if (value == null) {
            return null;
        }

        char c;
        final int len = value.length();
        final StringBuilder buf = new StringBuilder(len * 2);

        }
        fessConfig = ComponentUtil.getFessConfig();
    }

    @Override
    public FessConfig getFessConfig() {
        return fessConfig;
    }

    @Override
    public Logger getLogger() {
        return logger;
    }

    @Override
    protected Extractor getExtractor(final ResponseData responseData) {

        try {
            return groovyShell.evaluate(template);
        } catch (final JobProcessingException e) {
            throw e;
        } catch (final Exception e) {
            logger.warn("Failed to evaluate groovy script: {} => {}", template, paramMap, e);
            return null;
        } finally {
            final GroovyClassLoader loader = groovyShell.getClassLoader();

        return new CurlRequest(Method.GET, url);
    }

    public static CurlRequest post(final String url) {
        return new CurlRequest(Method.POST, url);
    }

    public static CurlRequest put(final String url) {
        return new CurlRequest(Method.PUT, url);
    }

    public static CurlRequest delete(final String url) {
        return new CurlRequest(Method.DELETE, url);
    }

            } catch (ArtifactResolutionException e) {
                result.addErrorArtifactException(e);
                return result;
            } catch (ArtifactNotFoundException e) {
                result.addMissingArtifact(request.getArtifact());
                return result;
            }
        }

        ArtifactResolutionRequest collectionRequest = request;

  @JsMethod
  static native boolean stringIsNullOrEmpty(@Nullable String string) /*-{
    return !string;
  }-*/;

  @JsMethod
  static native String nullToEmpty(@Nullable String string) /*-{
    return string || "";
  }-*/;

  @JsMethod
  static native String emptyToNull(@Nullable String string) /*-{
    return string || null;
  }-*/;

  static CommonPattern compilePattern(String pattern) {

  public SortedMap<K, Collection<V>> asMap() {
    return (SortedMap<K, Collection<V>>) super.asMap();
  }

  @Override
  SortedMap<K, Collection<V>> backingMap() {
    return (SortedMap<K, Collection<V>>) super.backingMap();
  }

  @Override
  public SortedSet<K> keySet() {
    return (SortedSet<K>) super.keySet();
  }

  @Override
  Set<K> createKeySet() {
    return createMaybeNavigableKeySet();
  }

  }

  @Override
  E get(int index) {
    return delegateList.get(index);
  }

  @Override
  public boolean contains(@CheckForNull Object object) {
    return delegate.contains(object);
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public int size() {
    return delegateList.size();
  }

  // redeclare to help optimizers with b/310253115