json.scala

case class GoogleApiResult[T](status: String, results: List[T])
case class AddressComponent(longName: String, shortName: String, types: List[String])
case class Location(lat: Double, lng: Double)
case class Bounds(northeast: Location, southwest:Location)
case class Viewport(northeast: Location, southwest:Location)
case class Geometry(bounds: Bounds, location: Location, locationType: String, viewport: Viewport)

object MyJsonProtocol extends DefaultJsonProtocol {
     implicit val locationFormat = jsonFormat2(Location)
     implicit val boundsFormat = jsonFormat2(Bounds)
     implicit val viewportFormat = jsonFormat2(Viewport)
     implicit val geometryFormat = jsonFormat4(Geometry)
     implicit def googleApiResultFormat[T :JsonFormat] = jsonFormat2(GoogleApiResult.apply[T])
     }

     val someJsonString = """{
    "results": [
        {
            "address_components": [
                {
                    "long_name": "11691",
                    "short_name": "11691",
                    "types": [
                        "postal_code"
                    ]
                },
                {
                    "long_name": "Far Rockaway",
                    "short_name": "Far Rockaway",
                    "types": [
                        "neighborhood",
                        "political"
                    ]
                },
                {
                    "long_name": "FAR ROCKAWAY",
                    "short_name": "FAR ROCKAWAY",
                    "types": [
                        "locality",
                        "political"
                    ]
                },
                {
                    "long_name": "New York",
                    "short_name": "NY",
                    "types": [
                        "administrative_area_level_1",
                        "political"
                    ]
                },
                {
                    "long_name": "United States",
                    "short_name": "US",
                    "types": [
                        "country",
                        "political"
                    ]
                }
            ],
            "formatted_address": "FAR ROCKAWAY, NY 11691, USA",
            "geometry": {
                "bounds": {
                    "northeast": {
                        "lat": 40.61421800000001,
                        "lng": -73.73799679999999
                    },
                    "southwest": {
                        "lat": 40.5884689,
                        "lng": -73.7894708
                    }
                },
                "location": {
                    "lat": 40.6024346,
                    "lng": -73.762495
                },
                "location_type": "APPROXIMATE",
                "viewport": {
                    "northeast": {
                        "lat": 40.61421800000001,
                        "lng": -73.73799679999999
                    },
                    "southwest": {
                        "lat": 40.5884689,
                        "lng": -73.7894708
                    }
                }
            },
            "types": [
                "postal_code"
            ]
        }
    ],
    "status": "OK"
}"""

     someJsonString.toJson.convertTo[GoogleApiResult[Geometry]]
java.lang.AbstractMethodError: MyJsonProtocol$.jsonFormat2(Lscala/Function2;Lspray/json/JsonFormat;Lspray/json/JsonFormat;Lscala/reflect/ClassTag;)Lspray/json/RootJsonFormat;
  at MyJsonProtocol$.<init>(<console>:24)
	at MyJsonProtocol$.<clinit>(<console>)
	at .<init>(<console>:29)
	at .<clinit>(<console>)
	at .<init>(<console>:7)
	at .<clinit>(<console>)
	at $print(<console>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:734)
	at scala.tools.nsc.interpreter.IMain$Request.loadAndRun(IMain.scala:983)
	at scala.tools.nsc.interpreter.IMain.loadAndRunReq$1(IMain.scala:573)
	at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:604)
	at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:568)
	at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:745)
	at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:790)
	at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:702)
	at scala.tools.nsc.interpreter.ILoop.processLine$1(ILoop.scala:566)
	at scala.tools.nsc.interpreter.ILoop.innerLoop$1(ILoop.scala:573)
	at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:576)
	at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:867)
	at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:822)
	at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:822)
	at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
	at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:822)
	at scala.tools.nsc.interpreter.ILoop.main(ILoop.scala:889)
	at xsbt.ConsoleInterface.run(ConsoleInterface.scala:57)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:73)
	at sbt.compiler.AnalyzingCompiler.console(AnalyzingCompiler.scala:64)
	at sbt.Console.console0$1(Console.scala:23)
	at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply$mcV$sp(Console.scala:24)
	at sbt.TrapExit$.executeMain$1(TrapExit.scala:33)
	at sbt.TrapExit$$anon$1.run(TrapExit.scala:42)