/**
  * Get the configurations from the configurations File as a {@link JsonElement}
  *
  * @return {@link JsonElement} The configuration tree contained inside the configuration File. If
  *     the File doesn't exist or an error occurred, the default configuration tree is returned
  */
 private JsonElement getConfigurationTreeFromFile() {
   if (mConfigurationFile.exists()) { // Check, if the configuration File exists on disk
     JsonParser parser = new JsonParser();
     try {
       JsonElement result = parser.parse(new FileReader(mConfigurationFile));
       if (result.isJsonObject()) { // Check if content is a valid JsonObject
         return result;
       }
     } catch (FileNotFoundException e) {
       e.printStackTrace();
     }
   }
   return mDefaultConfigurations; // If the configurations File doesn't exist on disk, return the
                                  // default configurations
 }
  private static boolean loadConfig(
      JsonElement parsed, Table<String, String, IConfigPropertyHolder> properties) {
    if (!parsed.isJsonObject()) return true;

    Gson gson = new Gson();

    JsonObject rootNode = parsed.getAsJsonObject();

    boolean missingFields = false;

    for (Map.Entry<String, Map<String, IConfigPropertyHolder>> e : properties.rowMap().entrySet()) {
      JsonElement categoryTmp = rootNode.get(e.getKey());
      missingFields |= parseCategory(categoryTmp, e.getValue(), gson);
    }

    return missingFields;
  }
 /**
  * Method to recursively convert a Json tree, consisting of {@link JsonElement}s, to a to a
  * configuration tree, consisting of {@link ConfigurationElement}s
  *
  * @param parentConfiguration {@link ConfigurationElement} The parent configuration of the new
  *     configurations added in this method call
  * @param parentJsonElement {@link JsonElement} The parent of the {@link JsonElement}s which will
  *     be converted to {@link ConfigurationElement}s
  */
 private void recConvertJsonTreeToConfigurationTree(
     ConfigurationElement parentConfiguration, JsonElement parentJsonElement) {
   if (parentJsonElement.isJsonObject()) {
     Set<Map.Entry<String, JsonElement>> childConfigurations =
         ((JsonObject) parentJsonElement).entrySet();
     for (Map.Entry<String, JsonElement> childConfiguration : childConfigurations) {
       if (childConfiguration.getValue().isJsonObject()) {
         ConfigurationElement newConfigurationSection =
             new ConfigurationElement(childConfiguration.getKey());
         parentConfiguration.addChildConfiguration(newConfigurationSection);
         recConvertJsonTreeToConfigurationTree(
             newConfigurationSection, childConfiguration.getValue());
       } else {
         parentConfiguration.addChildConfiguration(
             new ConfigurationElement(
                 childConfiguration.getKey(),
                 new JsonConfigurationValue(childConfiguration.getValue())));
       }
     }
   }
 }
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 public Object __parse_response__(String resp) throws RemoteException {
   JsonParser parser = new JsonParser();
   JsonElement main_response = (JsonElement) parser.parse(resp);
   if (main_response.isJsonArray()) {
     List<Object> res = new Vector<Object>();
     for (Object o : main_response.getAsJsonArray()) {
       res.add(__parse_response__(gson.toJson(o)));
     }
     return res;
   }
   JsonObject response = main_response.getAsJsonObject();
   if (response.has("error")) {
     JsonObject e = response.get("error").getAsJsonObject().get("data").getAsJsonObject();
     throw new RemoteException(e.get("exception").getAsString(), e.get("message").getAsString());
   }
   JsonElement value = response.get("result");
   String valuestr = gson.toJson(response.get("result"));
   if (valuestr.contains("hash:")) {
     Class<? extends RpcClient> klass = this.getClass();
     try {
       Constructor<? extends RpcClient> m =
           klass.getDeclaredConstructor(String.class, String.class);
       String new_endpoint = gson.fromJson(value, String.class);
       return m.newInstance(this.base_endpoint, new_endpoint.replace("hash:", ""));
     } catch (NoSuchMethodException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
       return null;
     } catch (IllegalArgumentException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
       return null;
     } catch (InstantiationException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
       return null;
     } catch (IllegalAccessException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
       return null;
     } catch (InvocationTargetException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
       return null;
     }
   } else if (valuestr.contains("funcs")) {
     return gson.fromJson(valuestr, Interface.class);
   }
   if (value.isJsonPrimitive()) {
     JsonPrimitive val = value.getAsJsonPrimitive();
     if (val.isBoolean()) {
       return val.getAsBoolean();
     } else if (val.isNumber()) {
       return val.getAsNumber();
     } else if (val.isString()) {
       DateTimeFormatter dtparser = ISODateTimeFormat.dateHourMinuteSecond();
       try {
         return dtparser.parseDateTime(val.getAsString());
       } catch (Exception ex) {
       }
       return val.getAsString();
     } else {
       return null;
     }
   } else if (value.isJsonNull()) {
     return null;
   } else if (value.isJsonObject() && !value.getAsJsonObject().has("__meta__")) {
     return gson.fromJson(value, HashMap.class);
   } else if (value.isJsonArray()) {
     if (value.getAsJsonArray().size() == 0) return new LinkedList();
     JsonElement obj = value.getAsJsonArray().get(0);
     if (obj.isJsonObject()) {
       if (!obj.getAsJsonObject().has("__meta__")) {
         return gson.fromJson(value, LinkedList.class);
       }
     }
   }
   return __resolve_references__(valuestr);
 }