public KeyValueWriter(Configuration conf, String host) { super(conf, host); String keyDataType = conf.get(OUTPUT_KEY_TYPE, "xs:string"); keyType = ValueType.valueOf(keyDataType); String valueDataType = conf.get(OUTPUT_VALUE_TYPE, "xs:string"); valueType = ValueType.valueOf(valueDataType); statement = conf.get(OUTPUT_QUERY); queryLanguage = conf.get(OUTPUT_QUERY_LANGUAGE); }