diff options
Diffstat (limited to 'yamlesque-spray-json/src/main/scala/formats.scala')
-rw-r--r-- | yamlesque-spray-json/src/main/scala/formats.scala | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/yamlesque-spray-json/src/main/scala/formats.scala b/yamlesque-spray-json/src/main/scala/formats.scala new file mode 100644 index 0000000..188f4a9 --- /dev/null +++ b/yamlesque-spray-json/src/main/scala/formats.scala @@ -0,0 +1,40 @@ +package yamlesque + +import spray.json._ + +trait JsonYamlFormats { + + implicit def jsonToYamlReader[A](implicit jsReader: JsonReader[A]): YamlReader[A] = new YamlReader[A] { + override def read(yaml: YamlValue): A = jsReader.read(JsonFormats.yamlToJson(yaml)) + } + + implicit def jsonToYamlWriter[A](implicit jsWriter: JsonWriter[A]): YamlWriter[A] = new YamlWriter[A] { + override def write(a: A): YamlValue = JsonFormats.jsonToYaml(jsWriter.write(a)) + } + +} + +object JsonFormats { + + def jsonToYaml(js: JsValue): YamlValue = js match { + case JsNull => YamlEmpty + case JsNumber(number) => YamlScalar(number.toString) + case JsBoolean(value) => YamlScalar(value.toString) + case JsString(value) => YamlScalar(value) + case JsArray(elements) => YamlSequence(elements.map(jsonToYaml _ )) + case JsObject(fields) => YamlMapping(fields.mapValues(jsonToYaml _ )) + } + + val JsNumberPattern = """([-+]?[0-9]*\.?[0-9]+(?:[eE][-+]?[0-9]+)?)""".r + + def yamlToJson(yaml: YamlValue): JsValue = yaml match { + case YamlEmpty => JsNull + case YamlScalar("true") => JsTrue + case YamlScalar("false") => JsFalse + case YamlScalar(JsNumberPattern(x)) => JsNumber(x.toDouble) + case YamlScalar(x) => JsString(x) + case YamlSequence(elements) => JsArray(elements.map(yamlToJson)) + case YamlMapping(fields) => JsObject(fields.mapValues(yamlToJson)) + } + +} |