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36 package gr.grnet.aquarium.converter
38 import net.liftweb.json.JsonAST.JValue
39 import net.liftweb.json._
40 import ext.JodaTimeSerializers
41 import gr.grnet.aquarium.event.ExternalEventSkeleton
45 * Provides conversion methods from and to JSON.
47 * The underlying library used is lift-json.
49 * @author Christos KK Loverdos <loverdos@gmail.com>
52 object JsonConversions {
54 * The application-wide JSON formats used from the underlying lift-json library.
56 implicit val Formats = (DefaultFormats ++ JodaTimeSerializers.all) +
57 FieldSerializer[ExternalEventSkeleton]()
60 * Converts a value to JSON AST (Abstract Syntax Tree) by acting a bit intelligently, depending on the actual type
61 * of the given value. In particular, if the given value `any` is already a JSON AST, it is returned
62 * as is. Also, if the given value `any` is a String, it is assumed that the string is already a JSON
63 * representation and then it is parsed to a JSON AST.
65 final def anyToJValue(any: Any)(implicit formats: Formats = Formats): JValue = {
71 case jsonFormat: JsonTextFormat ⇒
72 jsonToJValue(jsonFormat.value)
74 Extraction.decompose(any)
78 final def jsonToJValue(json: String): JValue = {
82 final def jValueToCompactString(jValue: JValue): String = {
83 Printer.compact(JsonAST.render(jValue))
86 final def jValueToPrettyString(jValue: JValue): String = {
87 Printer.pretty(JsonAST.render(jValue))
90 final def anyToJson(any: Any, pretty: Boolean = true)(implicit formats: Formats = Formats): String = {
91 val jValue = anyToJValue(any)
92 val jDoc = JsonAST.render(jValue)
100 final def jsonBytesToObject[A: Manifest](bytes: Array[Byte], encoding: String = "UTF-8"): A = {
101 val json = new String(bytes, encoding)
102 jsonToObject[A](json)
105 final def jsonToObject[A](json: String)(implicit ma: Manifest[A], formats: Formats = Formats): A = {
106 val jValue = parse(json)
107 jValueToObject[A](jValue)
110 final def jValueToObject[A](jValue: JValue)(implicit ma: Manifest[A], formats: Formats = Formats): A = {
111 Extraction.extract[A](jValue)