Play json Mapping

Enhance the ability to create writes and reads from complex case classes graph.

Supports Scala 2.13 and Scala 3.

Installation

Add into your build.sbt the following lines:

resolvers +="GitHub Package Registry" at "https://maven.pkg.github.com/null-vector/play-json-mapping"
credentials ++= {
valtoken= sys.env.get("GITHUB_TOKEN")
token.toSeq.map { t =>Credentials("GitHub Package Registry", "maven.pkg.github.com", "_", t)
}
}
libraryDependencies +="null-vector"%%"play-json-mapping"%"<version>"

GitHub Packages requires a token with read:packages (set GITHUB_TOKEN).

Published packages: https://github.com/null-vector/play-json-mapping/packages

Example

This example use the same model using in play-json examples:

importplay.api.libs.json._importorg.nullvector.api.json.JsonMapper._caseclassLocation(lat: Double, long: Double)
caseclassResident(name: String, age: Int, role: Option[String])
caseclassPlace(name: String, centerLocation: Location, residents: Seq[Resident])
implicitvalw:Writes[Place] = writesOf[Place]
implicitvalr:Reads[Place] = readsOf[Place]
//or just:implicitvalm:Format[Place] = mappingOf[Place]

And use as follow:

valplace=Place(
"Watership Down",
Location(51.235685, -1.309197),
Seq(
Resident("Fiver", 4, None),
Resident("Bigwig", 6, Some("Owsla"))
)
)
valjson:JsValue= place.asJson

Scala Enumerations are also automatic mapping:

caseclassMoney(amount: BigDecimal, currency: Money.Currency)
objectMoneyextendsEnumeration {
typeCurrency=ValuevalARS, BRL, USD, MXN=Value
}
...
implicitvalmoneyMapping:Format[Money] =JsonMapper.mappingOf[Money]