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July 27, 2019 23:41
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spray-json handle more than 22 fields
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import spray.json.{DefaultJsonProtocol, JsBoolean, JsObject, JsString, JsValue, RootJsonFormat} | |
case class Document(field1: String, field2: String, field3: String, field4: String, field5: String, field6: String, | |
field7: String, field8: String, field9: String, field10: String, field11: String, field12: String, | |
field13: String, field14: String, field15: String, field16: String, field17: String, field18: String, | |
field19: String, field20: String, field21: String, field22: String, field23: String, field24: String, | |
approved: Boolean) | |
object DocumentProtocol extends DefaultJsonProtocol { | |
implicit object DocumentFormat extends RootJsonFormat[Document] { | |
override def write(obj: Document): JsValue = { | |
JsObject( | |
"field1" -> JsString(obj.field1), | |
"field2" -> JsString(obj.field2), | |
"field3" -> JsString(obj.field3), | |
"field4" -> JsString(obj.field4), | |
"field5" -> JsString(obj.field5), | |
"field6" -> JsString(obj.field6), | |
"field7" -> JsString(obj.field7), | |
"field8" -> JsString(obj.field8), | |
"field9" -> JsString(obj.field9), | |
"field10" -> JsString(obj.field10), | |
"field11" -> JsString(obj.field11), | |
"field12" -> JsString(obj.field12), | |
"field13" -> JsString(obj.field13), | |
"field14" -> JsString(obj.field14), | |
"field15" -> JsString(obj.field15), | |
"field16" -> JsString(obj.field16), | |
"field17" -> JsString(obj.field17), | |
"field18" -> JsString(obj.field18), | |
"field19" -> JsString(obj.field19), | |
"field20" -> JsString(obj.field20), | |
"field21" -> JsString(obj.field21), | |
"field22" -> JsString(obj.field22), | |
"field23" -> JsString(obj.field23), | |
"field24" -> JsString(obj.field24), | |
"approved" -> JsBoolean(obj.approved) | |
) | |
} | |
def read(json: JsValue): Document = { | |
val fields = json.asJsObject.fields | |
Document( | |
fields("field1").convertTo[String], | |
fields("field2").convertTo[String], | |
fields("field3").convertTo[String], | |
fields("field4").convertTo[String], | |
fields("field5").convertTo[String], | |
fields("field6").convertTo[String], | |
fields("field7").convertTo[String], | |
fields("field8").convertTo[String], | |
fields("field9").convertTo[String], | |
fields("field10").convertTo[String], | |
fields("field11").convertTo[String], | |
fields("field12").convertTo[String], | |
fields("field13").convertTo[String], | |
fields("field14").convertTo[String], | |
fields("field15").convertTo[String], | |
fields("field16").convertTo[String], | |
fields("field17").convertTo[String], | |
fields("field18").convertTo[String], | |
fields("field19").convertTo[String], | |
fields("field20").convertTo[String], | |
fields("field21").convertTo[String], | |
fields("field22").convertTo[String], | |
fields("field23").convertTo[String], | |
fields("field24").convertTo[String], | |
fields("approved").convertTo[Boolean] | |
) | |
} | |
} | |
} | |
/** | |
* Handle objects more than 22 fields | |
*/ | |
def handleDocument(): Unit = { | |
import DocumentProtocol._ | |
val obj = Document( | |
"field1", "field2", "field3", "field4", "field5", "field6", | |
"field7", "field8", "field9", "field10", "field11", "field12", | |
"field13", "field14", "field15", "field16", "field17", "field18", | |
"field19", "field20", "field21", "field22", "field23", "field24", | |
approved = true | |
) | |
println(obj.toJson.toString()) | |
val json = | |
""" | |
|{ | |
| "field1":"field1", | |
| "field2":"field2", | |
| "field3":"field3", | |
| "field4":"field4", | |
| "field5":"field5", | |
| "field6":"field6", | |
| "field7":"field7", | |
| "field8":"field8", | |
| "field9":"field9", | |
| "field10":"field10", | |
| "field11":"field11", | |
| "field12":"field12", | |
| "field13":"field13", | |
| "field14":"field14", | |
| "field15":"field15", | |
| "field16":"field16", | |
| "field17":"field17", | |
| "field18":"field18", | |
| "field19":"field19", | |
| "field20":"field20", | |
| "field21":"field21", | |
| "field22":"field22", | |
| "field23":"field23", | |
| "field24":"field24", | |
| "approved":true | |
|} | |
""".stripMargin | |
println(json.parseJson.convertTo[Document]) | |
} | |
/* | |
* output | |
Document(field1,field2,field3,field4,field5,field6,field7,field8,field9,field10,field11,field12,field13,field14,field15,field16,field17,field18,field19,field20,field21,field22,field23,field24,true) | |
*/ |
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This file save my life 2 days of investigation and 2 libraries proved later. Thank you so much.