JarCastingJSON Extensions
Simple wrapper for json4s to simplify de/serialization of JSON.
Usage
Deserialize JSON to a Scala Case Class
import io.onema.json.Extensions._
case class TestJsonFoo(name: String, value: String, id: Int = 0)
val fooJson = "{\"name\": \"test\", \"value\": \"foo\"}"
val fooObject = fooJson.jsonDecode[TestJsonFoo]
fooObject.name should be("test")
fooObject.value should be("foo")
fooObject.id should be(0)
Serialize Scala Class to JSON string
import io.onema.json.Extensions._
case class Message(data: Seq[String])
val result = "{\"data\":[\"http://foo.com\",\"http://bar.com\",\"http://baz.com\",\"http://blah.org\"]}"
val message = Message(Seq("http://foo.com", "http://bar.com", "http://baz.com", "http://blah.org"))
val jsonValue = message.asJson
jsonValue should be(result)
Serialize using a custom serializer
Case class and custom types
case class TestWithTypes(name: String, testType: TestType)
object TestTypes {
sealed abstract class TestType(val name: String)
case object TEST_1 extends TestType("work-request")
case object TEST_2 extends TestType("process-request")
}
Custom Serializer
object TestTypeSerializer extends CustomSerializer[TestType](format => ({
case JString("test-1") => TEST_1
case JString("test-2") => TEST_2
}, {
case TEST_1 => JString("test-1")
case TEST_2 => JString("test-2")
}
))
Using the custom serializer
val result = "{\"name\":\"foo\",\"testType\":\"test-1\"}"
val obj = TestWithTypes("foo", TEST_1)
val jsonValue = obj.asJson(TestTypeSerializer)
jsonValue should be(result)
Deserialize to Java POJO
import io.onema.json.JavaExtensions._
val fooJson = "{\"name\": \"test\", \"value\": \"foo\"}"
val fooObject = fooJson.jsonDecode[TestJsonPojo]
fooObject.getName should be("test")
fooObject.getValue should be("foo")
fooObject.getId should be(0)
Serialize java POJO to JSON string
import io.onema.json.JavaExtensions._
val result = "{\"data\":[\"http://foo.com\",\"http://bar.com\",\"http://baz.com\",\"http://blah.org\"]}"
val message = new TestJsonPojo()
val jsonValue = message.asJson
jsonValue should be(result)
Using a Custom Object Mapper for POJOs
import io.onema.json.JavaExtensions._
import com.fasterxml.jackson.databind.ObjectMapper
val mapper: ObjectMapper = new ObjectMapper()
.registerModule(new JodaModule)
.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true)
.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
val fooObject = json.jsonDecode[TestJsonPojo](mapper)