migrated to json4s

samples/server-generator/scalatra/templates/build.sbt

@@ -16,7 +16,7 @@ libraryDependencies ++= Seq(
   "org.scalatra"                 % "scalatra-specs2"        % "2.2.0-SNAPSHOT"     % "test",
   "org.scalatra"                 % "scalatra-swagger"       % "2.2.0-SNAPSHOT",
   "org.scalatra"                 % "scalatra-json"          % "2.2.0-SNAPSHOT",
-  "org.json4s"                  %% "json4s-jackson"         % "3.0.0-SNAPSHOT",
+  "org.json4s"                  %% "json4s-jackson"         % "3.0.0",
   "com.wordnik"                  % "swagger-core_2.9.1"     % "1.1.1-SNAPSHOT",
   "ch.qos.logback"               % "logback-classic"        % "1.0.6" % "runtime",
   "org.eclipse.jetty"            % "jetty-webapp"           % "8.1.5.v20120716"     % "container",

src/main/scala/com/wordnik/swagger/codegen/BasicJavaGenerator.scala

@@ -129,12 +129,7 @@ class BasicJavaGenerator extends BasicGenerator {
       case "List" => {
         val inner = {
           obj.items match {
-            case Some(items) => {
+            case Some(items) => items.ref.getOrElse(items.`type`)
-              if(items.ref != null) 
-                items.ref
-              else
-                items.`type`
-            }
             case _ => throw new Exception("no inner type defined")
           }
         }
@@ -159,12 +154,7 @@ class BasicJavaGenerator extends BasicGenerator {
       case "List" => {
         val inner = {
           obj.items match {
-            case Some(items) => {
+            case Some(items) => items.ref.getOrElse(items.`type`)
-              if(items.ref != null) 
-                items.ref
-              else
-                items.`type`
-            }
             case _ => throw new Exception("no inner type defined")
           }
         }

src/main/scala/com/wordnik/swagger/codegen/BasicPythonGenerator.scala

@@ -139,12 +139,7 @@ class BasicPythonGenerator extends BasicGenerator {
       case "list" => {
         val inner = {
           obj.items match {
-            case Some(items) => {
+            case Some(items) => items.ref.getOrElse(items.`type`)
-              if(items.ref != null) 
-                items.ref
-              else
-                items.`type`
-            }
             case _ => throw new Exception("no inner type defined")
           }
         }

src/main/scala/com/wordnik/swagger/codegen/BasicScalaGenerator.scala

@@ -78,12 +78,7 @@ class BasicScalaGenerator extends BasicGenerator {
       case "Array" => {
         val inner = {
           obj.items match {
-            case Some(items) => {
+            case Some(items) => items.ref.getOrElse(items.`type`)
-              if(items.ref != null) 
-                items.ref
-              else
-                items.`type`
-            }
             case _ => throw new Exception("no inner type defined")
           }
         }

src/main/scala/com/wordnik/swagger/codegen/Codegen.scala

@@ -364,12 +364,8 @@ class Codegen(config: CodegenConfig) {
         // import the container
         imports += Map("import" -> dt)
         propertyDocSchema.items match {
-          case Some(items) => {
+          case Some(items) =>
-            if(items.ref != null)
+            baseType = items.ref.getOrElse(items.`type`)
-              baseType = items.ref
-            else if (items.`type` != null)
-              baseType = items.`type`
-          }
           case _ =>
         }
       }

src/main/scala/com/wordnik/swagger/codegen/language/CodegenConfig.scala

@@ -138,8 +138,8 @@ abstract class CodegenConfig {
         val inner = {
           obj.items match {
             case Some(items) => {
-              if(items.ref != null) 
+              if(items.ref != None) 
-                items.ref
+                items.ref.get
               else
                 items.`type`
             }

src/main/scala/com/wordnik/swagger/codegen/spec/SwaggerSpecValidator.scala

@@ -182,13 +182,13 @@ class SwaggerSpecValidator(private val doc: ResourceListing,
           // process the sub object
           subObject.items match {
             case Some(item) => {
-              getUpdatedType(validModelNames, item.ref) match {
+              getUpdatedType(validModelNames, item.ref.get) match {
                 case Some(updatedType) => {
                   if (!item.ref.equals(updatedType)) {
                     !!(model, MODEL_PROPERTY, format("%s->%s: %s", model.id, subObjectName, subObject.`type`), format("Invalid ref (%s). Best guess: %s", item.ref, updatedType))
                     LOGGER.finest("updated subObject.items.ref " + item.ref + " to " + updatedType)
                     if (fix) {
-                      subObject.items = Some(ModelRef(ref = updatedType))
+                      subObject.items = Some(ModelRef(null, Some(updatedType)))
                     }
                   }
                 }
@@ -202,12 +202,12 @@ class SwaggerSpecValidator(private val doc: ResourceListing,
           if (subObject.items != null && subObject.items != None && subObject.items.get.ref != null){
             subObject.items match {
               case Some(item) => {
-                getUpdatedType(validModelNames, item.ref) match {
+                getUpdatedType(validModelNames, item.ref.get) match {
                   case Some(updatedType) => {
                     if (!item.ref.equals(updatedType)) {
                       !!(model, MODEL_PROPERTY, format("%s->%s: %s", model.id, subObjectName, subObject.`type`), format("Invalid ref (%s). Best guess: %s", item.ref, updatedType))
                       LOGGER.finest("updated subObject.items.ref " + item.ref + " to " + updatedType)
-                      if (fix) subObject.items = Some(ModelRef(ref = updatedType))
+                      if (fix) subObject.items = Some(ModelRef(null, Some(updatedType)))
                     }
                   }
                   case None => {

src/main/scala/com/wordnik/swagger/codegen/util/ApiExtractor.scala

@@ -18,6 +18,9 @@ package com.wordnik.swagger.codegen.util
 
 import com.wordnik.swagger.model._
 
+import org.json4s.jackson.JsonMethods._
+import org.json4s.native.Serialization.read
+
 import java.net.URL
 import java.io.InputStream
 
@@ -25,31 +28,31 @@ import scala.io._
 import scala.collection.mutable.{ ListBuffer, HashMap, HashSet }
 
 object ApiExtractor extends RemoteUrl {
-  def json = ScalaJsonUtil.getJsonMapper
+  implicit val formats = SwaggerSerializers.formats
 
   def fetchApiListings(basePath: String, apis: List[ApiListingReference], apiKey: Option[String] = None): List[ApiListing] = {
     for (api <- apis) yield {
-      val str = basePath.startsWith("http") match {
+      val json = basePath.startsWith("http") match {
         case true => {
           println("calling: " + ((basePath + api.path + apiKey.getOrElse("")).replaceAll(".\\{format\\}", ".json")))
           urlToString((basePath + api.path + apiKey.getOrElse("")).replaceAll(".\\{format\\}", ".json"))
         }
         case false => Source.fromFile((basePath + api.path).replaceAll(".\\{format\\}", ".json")).mkString
       }
-      json.readValue(str, classOf[ApiListing])
+      parse(json).extract[ApiListing]
     }
   }
 
   def extractApiOperations(basePath: String, references: List[ApiListingReference], apiKey: Option[String] = None) = {
     for (api <- references) yield {
-      val str = basePath.startsWith("http") match {
+      val json = basePath.startsWith("http") match {
         case true => {
           println("calling: " + ((basePath + api.path + apiKey.getOrElse("")).replaceAll(".\\{format\\}", ".json")))
           urlToString((basePath + api.path + apiKey.getOrElse("")).replaceAll(".\\{format\\}", ".json"))
         }
         case false => Source.fromFile((basePath + api.path).replaceAll(".\\{format\\}", ".json")).mkString
       }
-      json.readValue(str, classOf[ApiListing])
+      parse(json).extract[ApiListing]
     }
   }
 

src/main/scala/com/wordnik/swagger/codegen/util/CoreUtils.scala

@@ -71,12 +71,7 @@ object CoreUtils {
         val subObject = prop._2
         if (containers.contains(subObject.`type`)) {
           subObject.items match {
-            case Some(item) => {
+            case Some(item) => subNames += item.ref.getOrElse(item.`type`)
-              if(item.ref != null)
-                subNames += item.ref
-              else
-                subNames += item.`type`
-            }
             case None => 
           }
         }
@@ -129,11 +124,9 @@ object CoreUtils {
         if (containers.contains(subObject.`type`)) {
           subObject.items match {
             case Some(subItem) => {
-              if (subItem.ref != null) {
+              val sn = subItem.ref.getOrElse(subItem.`type`)
-                subNames += subItem.ref
+              if(sn != null)
-              } else {
+                subNames += sn
-                subNames += subItem.`type`
-              }
             }
             case _ =>
           }
@@ -148,11 +141,9 @@ object CoreUtils {
         if (containers.contains(subObject.`type`)) {
           subObject.items match {
             case Some(subItem) => {
-              if (subItem.ref != null) {
+              val sn = subItem.ref.getOrElse(subItem.`type`)
-                subNames += subItem.ref
+              if(sn != null)
-              } else {
+                subNames += sn
-                subNames += subItem.`type`
-              }
             }
             case _ =>
           }

src/main/scala/com/wordnik/swagger/codegen/util/ResourceExtractor.scala

@@ -18,16 +18,19 @@ package com.wordnik.swagger.codegen.util
 
 import com.wordnik.swagger.model._
 
+import org.json4s.jackson.JsonMethods._
+import org.json4s.native.Serialization.read
+
 import scala.io._
 
 object ResourceExtractor extends RemoteUrl {
-	def json = ScalaJsonUtil.getJsonMapper
+  implicit val formats = SwaggerSerializers.formats
 
 	def fetchListing(path: String, apiKey: Option[String] = None): ResourceListing = {
-		val str = path.startsWith("http") match {
+		val json = path.startsWith("http") match {
 			case true => urlToString(path + apiKey.getOrElse(""))
 			case false => Source.fromFile(path).mkString
 		}
-		json.readValue(str, classOf[ResourceListing])
+		parse(json).extract[ResourceListing]
 	}
 }

src/main/scala/com/wordnik/swagger/model/AllowableValues.java

@@ -1,34 +0,0 @@
-/**
- *  Copyright 2012 Wordnik, Inc.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-package com.wordnik.swagger.model;
-
-import javax.xml.bind.annotation.*;
-
-import com.fasterxml.jackson.annotation.*;
-
-import static com.fasterxml.jackson.annotation.JsonTypeInfo.*;
-
-/**
- * forgive me lord, for I used Java
- * @SeeAlso https://issues.scala-lang.org/browse/SI-5165
- **/
-@JsonTypeInfo(use=Id.NAME, include=As.PROPERTY, property="valueType")
-@JsonSubTypes({
-    @JsonSubTypes.Type(value=AllowableListValues.class, name="LIST"),
-    @JsonSubTypes.Type(value=AllowableRangeValues.class, name="RANGE")
-})  
-public abstract class AllowableValues {}

src/main/scala/com/wordnik/swagger/model/SwaggerModelSerializer.scala

@@ -5,8 +5,7 @@ import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 import org.json4s.native.Serialization.{read, write}
 
-import scala.collection.mutable.HashMap
+import scala.collection.mutable.LinkedHashMap
-import scala.collection.JavaConverters._
 
 object SwaggerSerializers {
   implicit val formats = DefaultFormats + 
@@ -19,7 +18,40 @@ object SwaggerSerializers {
     new ErrorResponseSerializer +
     new ApiDescriptionSerializer +
     new ApiListingReferenceSerializer +
-    new ResourceListingSerializer
+    new ResourceListingSerializer +
+    new ApiListingSerializer
+
+  class ApiListingSerializer extends CustomSerializer[ApiListing](formats => ({
+    case json =>
+      implicit val fmts: Formats = formats
+      ApiListing(
+        (json \ "apiVersion").extract[String],
+        (json \ "swaggerVersion").extract[String],
+        (json \ "basePath").extract[String],
+        (json \ "resourcePath").extract[String],
+        (json \ "apis").extract[List[ApiDescription]],
+        (json \ "models").extract[Map[String, Model]]
+      )
+    }, {
+      case x: ApiListing =>
+      implicit val fmts = formats
+      ("apiVersion" -> x.apiVersion) ~
+      ("swaggerVersion" -> x.swaggerVersion) ~
+      ("basePath" -> x.basePath) ~
+      ("apis" -> {
+        x.apis match {
+          case e: List[ApiDescription] if (e.size > 0) => Extraction.decompose(e)
+          case _ => JNothing
+        }
+      }) ~
+      ("models" -> {
+        x.models match {
+          case e: Map[String, Model] if (e.size > 0) => Extraction.decompose(e)
+          case _ => JNothing
+        }
+      })
+    }
+  ))
 
   class ResourceListingSerializer extends CustomSerializer[ResourceListing](formats => ({
     case json =>
@@ -103,7 +135,7 @@ object SwaggerSerializers {
       Operation(
         (json \ "httpMethod").extract[String],
         (json \ "summary").extract[String],
-        (json \ "notes").extract[String],
+        (json \ "notes").extractOrElse(""),
         (json \ "responseClass").extract[String],
         (json \ "nickname").extract[String],
         (json \ "parameters").extract[List[Parameter]],
@@ -133,13 +165,13 @@ object SwaggerSerializers {
     case json =>
       implicit val fmts: Formats = formats
       Parameter(
-        (json \ "name").extract[String],
+        (json \ "name").extractOrElse(""),
         (json \ "description").extract[String],
-        (json \ "defaultValue").extract[String],
+        (json \ "defaultValue").extractOrElse(""),
         (json \ "required").extractOrElse(false),
         (json \ "allowMultiple").extractOrElse(false),
         (json \ "dataType").extract[String],
-        (json \ "allowableValues").extract[AllowableValuesFoo],
+        (json \ "allowableValues").extract[AllowableValues],
         (json \ "paramType").extract[String]
       )
     }, {
@@ -154,7 +186,7 @@ object SwaggerSerializers {
       ("allowableValues" -> {
         x.allowableValues match {
           case Any => JNothing // don't serialize when not a concrete type
-          case e:AllowableValuesFoo => Extraction.decompose(x.allowableValues)
+          case e:AllowableValues => Extraction.decompose(x.allowableValues)
           case _ => JNothing
         }
       }) ~
@@ -165,7 +197,7 @@ object SwaggerSerializers {
   class ModelSerializer extends CustomSerializer[Model](formats => ({
     case json =>
       implicit val fmts: Formats = formats
-      val output = new HashMap[String, ModelProperty]
+      val output = new LinkedHashMap[String, ModelProperty]
       val properties = (json \ "properties") match {
         case JObject(entries) => {
           entries.map({
@@ -177,8 +209,8 @@ object SwaggerSerializers {
 
       Model(
         (json \ "id").extract[String],
-        (json \ "name").extract[String],
+        (json \ "name").extractOrElse(""),
-        output.asJava,
+        output,
         (json \ "description").extractOpt[String]
       )
     }, {
@@ -188,7 +220,7 @@ object SwaggerSerializers {
       ("name" -> x.name) ~
       ("properties" -> {
         x.properties match {
-          case e:java.util.Map[String, ModelProperty] => Extraction.decompose(e.asScala.toMap)
+          case e: LinkedHashMap[String, ModelProperty] => Extraction.decompose(e.toMap)
           case _ => JNothing
         }
       })
@@ -202,7 +234,7 @@ object SwaggerSerializers {
         `type` = (json \ "type").extractOrElse(""),
         required = ((json \ "required").extractOrElse(false)),
         description = (json \ "description").extractOpt[String],
-        allowableValues = (json \ "allowableValues").extract[AllowableValuesFoo],
+        allowableValues = (json \ "allowableValues").extract[AllowableValues],
         items = (json \ "items").extractOpt[ModelRef]
       )
     }, {
@@ -214,7 +246,7 @@ object SwaggerSerializers {
       ("allowableValues" -> {
         x.allowableValues match {
           case Any => JNothing // don't serialize when not a concrete type
-          case e:AllowableValuesFoo => Extraction.decompose(x.allowableValues)
+          case e:AllowableValues => Extraction.decompose(x.allowableValues)
           case _ => JNothing
         }
       }) ~
@@ -226,18 +258,23 @@ object SwaggerSerializers {
     case json =>
       implicit val fmts: Formats = formats
       ModelRef(
-        (json \ "$ref").extract[String],
+        (json \ "type").extractOrElse(null: String),
-        (json \ "type").extract[String]
+        (json \ "$ref").extractOpt[String]
       )
     }, {
       case x: ModelRef =>
       implicit val fmts = formats
-      ("$ref" -> x.ref) ~
+      ("type" -> {
-      ("type" -> x.`type`)
+        x.`type` match {
+          case e:String => Some(e)
+          case _ => None
+        }
+      }) ~
+      ("$ref" -> x.ref)
     }
   ))
 
-  class AllowableValuesSerializer extends CustomSerializer[AllowableValuesFoo](formats => ({
+  class AllowableValuesSerializer extends CustomSerializer[AllowableValues](formats => ({
     case json =>
       implicit val fmts: Formats = formats
       json \ "valueType" match {

src/main/scala/com/wordnik/swagger/model/SwaggerModels.scala

@@ -16,7 +16,7 @@
 
 package com.wordnik.swagger.model
 
-import com.fasterxml.jackson.annotation.{JsonProperty, JsonIgnore}
+import scala.collection.mutable.LinkedHashMap
 
 case class ResourceListing(
   apiVersion: String, 
@@ -26,29 +26,27 @@ case class ResourceListing(
 
 case class ApiListingReference(path:String, description: String)
 
-trait AllowableValuesFoo
+trait AllowableValues
-case object Any extends AllowableValues with AllowableValuesFoo
+case object Any extends AllowableValues
-case class AllowableListValues (values: List[String] = List(), valueType: String = "LIST") extends AllowableValues with AllowableValuesFoo
+case class AllowableListValues (values: List[String] = List(), valueType: String = "LIST") extends AllowableValues
-case class AllowableRangeValues(min: String, max: String) extends AllowableValues with AllowableValuesFoo
+case class AllowableRangeValues(min: String, max: String) extends AllowableValues
 
-// using java.util.Map because Jackon 2 isn't deserializing ListMap correctly, and ordered
-// insertion is required
 case class Model(
   var id: String,
   var name: String,
-  var properties: java.util.Map[String, ModelProperty],
+  var properties: LinkedHashMap[String, ModelProperty],
   description: Option[String] = None)
 
 case class ModelProperty(
   var `type`: String,
   required: Boolean = false,
   description: Option[String] = None,
-  allowableValues: AllowableValuesFoo = Any,
+  allowableValues: AllowableValues = Any,
   var items: Option[ModelRef] = None)
 
 case class ModelRef(
-  @JsonProperty("$ref") ref: String = null,
+  `type`: String,
-  `type`: String = null)
+  ref: Option[String] = None)
 
 case class ApiListing (
   apiVersion: String,
@@ -80,7 +78,7 @@ case class Parameter (
   required: Boolean,
   allowMultiple: Boolean,
   var dataType: String,
-  allowableValues: AllowableValuesFoo = Any,
+  allowableValues: AllowableValues = Any,
   paramType: String)
 
 case class ErrorResponse (

src/test/resources/petstore/pet.json

@@ -115,8 +115,7 @@
                   "available",
                   "pending",
                   "sold"
-                ],
+                ]
-                "valueType":"LIST"
               },
               "required":true,
               "allowMultiple":true,
@@ -197,8 +196,7 @@
               "available",
               "pending",
               "sold"
-            ],
+            ]
-            "valueType":"LIST"
           },
           "description":"pet status in the store",
           "type":"string"

src/test/scala/BasicGeneratorTest.scala

@@ -23,9 +23,7 @@ import org.scalatest.junit.JUnitRunner
 import org.scalatest.FlatSpec
 import org.scalatest.matchers.ShouldMatchers
 
-import scala.collection.JavaConverters._
+import scala.collection.mutable.{LinkedHashMap, HashMap}
-import scala.collection.mutable.HashMap
-import scala.collection.immutable.ListMap
 
 @RunWith(classOf[JUnitRunner])
 class BasicGeneratorTest extends FlatSpec with ShouldMatchers {
@@ -46,12 +44,14 @@ class BasicGeneratorTest extends FlatSpec with ShouldMatchers {
 
   it should "get operations" in {
     val resourceListing = ResourceExtractor.fetchListing("src/test/resources/petstore/resources.json")
+
     val subDocs = ApiExtractor.fetchApiListings("src/test/resources/petstore", resourceListing.apis)
-    val allModels = new HashMap[String, Model]()
+    val allModels = new HashMap[String, Model]
 
     implicit val basePath = "http://localhost:8080/api"
     val generator = new SampleGenerator
     val ops = generator.extractApiOperations(subDocs, allModels)
+
     allModels.size should be (5)
     ops.size should be (16)
 
@@ -138,12 +138,12 @@ class BasicGeneratorTest extends FlatSpec with ShouldMatchers {
     Model(
       "SampleObject",
       "SampleObject",
-      Map(
+      LinkedHashMap(
         "stringValue" -> ModelProperty("string"),
         "intValue" -> ModelProperty("int"),
         "longValue" -> ModelProperty("long"),
         "floatValue" -> ModelProperty("float"),
-        "doubleValue" -> ModelProperty("double")).asJava,
+        "doubleValue" -> ModelProperty("double")),
       Some("a sample object"))
   }
 }

src/test/scala/ModelSerializersTest.scala

@@ -1,16 +1,16 @@
+import com.wordnik.swagger.model._
+
 import org.json4s._
 import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 import org.json4s.native.Serialization.{read, write}
 
-import com.wordnik.swagger.model._
-
 import org.junit.runner.RunWith
 import org.scalatest.junit.JUnitRunner
 import org.scalatest.FlatSpec
 import org.scalatest.matchers.ShouldMatchers
 
-import scala.collection.JavaConverters._
+import scala.collection.mutable.LinkedHashMap
 
 @RunWith(classOf[JUnitRunner])
 class ResourceListingSerializersTest extends FlatSpec with ShouldMatchers {
@@ -328,6 +328,12 @@ class ModelSerializationTest extends FlatSpec with ShouldMatchers {
           "type":"string",
           "required":false,
           "description":"name"
+        },
+        "tags": {
+          "type":"Array",
+          "items": {
+            "type":"string"
+          }
         }
       },
       "description":"nice model"
@@ -339,9 +345,9 @@ class ModelSerializationTest extends FlatSpec with ShouldMatchers {
         model.id should be ("Foo")
         model.name should be ("Bar")
         model.properties should not be (null)
-        model.properties.size should be (2)
+        model.properties.size should be (3)
         model.description should be (Some("nice model"))
-        model.properties.asScala("id") match {
+        model.properties("id") match {
           case e: ModelProperty => {
             e.`type` should be ("string")
             e.required should be (true)
@@ -349,7 +355,7 @@ class ModelSerializationTest extends FlatSpec with ShouldMatchers {
           }
           case _ => fail("missing property id")
         }
-        model.properties.asScala("name") match {
+        model.properties("name") match {
           case e: ModelProperty => {
             e.`type` should be ("string")
             e.required should be (false)
@@ -357,13 +363,25 @@ class ModelSerializationTest extends FlatSpec with ShouldMatchers {
           }
           case _ => fail("missing property name")
         }
+
+        model.properties("tags") match {
+          case e: ModelProperty => {
+            e.`type` should be ("Array")
+            e.required should be (false)
+            e.items match {
+              case Some(items) => items.`type` should be ("string")
+              case _ => fail("didn't find ref for Array")
+            }
+          }
+          case _ => fail("missing property name")
+        }
       }
       case _ => fail("expected type Model")
     }
   }
 
   it should "serialize a model" in {
-    val ref = Model("Foo", "Bar", (Map("s" -> ModelProperty("string", true, Some("a string")))).asJava)
+    val ref = Model("Foo", "Bar", (LinkedHashMap("s" -> ModelProperty("string", true, Some("a string")))))
     write(ref) should be ("""{"id":"Foo","name":"Bar","properties":{"s":{"type":"string","required":true,"description":"a string"}}}""")
   }
 }
@@ -382,7 +400,7 @@ class ModelRefSerializationTest extends FlatSpec with ShouldMatchers {
     val json = parse(jsonString)
     json.extract[ModelRef] match {
       case p: ModelRef => {
-        p.ref should be ("Foo")
+        p.ref should be (Some("Foo"))
         p.`type` should be ("Bar")
       }
       case _ => fail("expected type ModelRef")
@@ -390,8 +408,8 @@ class ModelRefSerializationTest extends FlatSpec with ShouldMatchers {
   }
 
   it should "serialize a model ref" in {
-    val ref = ModelRef("Foo", "Bar")
+    val ref = ModelRef("Foo", Some("Bar"))
-    write(ref) should be ("""{"$ref":"Foo","type":"Bar"}""")
+    write(ref) should be ("""{"type":"Foo","$ref":"Bar"}""")
   }
 }
 
@@ -410,8 +428,8 @@ class ModelPropertySerializationTest extends FlatSpec with ShouldMatchers {
         "values":["1","2","3"]
       },
       "items":{
-        "$ref":"Foo",
+        "type":"Foo",
-        "type":"Bar"
+        "$ref":"Bar"
       }
     }
     """
@@ -427,8 +445,8 @@ class ModelPropertySerializationTest extends FlatSpec with ShouldMatchers {
         }
         p.items match {
           case Some(e: ModelRef) => {
-            e.ref should be ("Foo")
+            e.`type` should be ("Foo")
-            e.`type` should be ("Bar")
+            e.ref should be (Some("Bar"))
           }
           case _ => fail("expected type ModelProperty")
         }
@@ -438,8 +456,8 @@ class ModelPropertySerializationTest extends FlatSpec with ShouldMatchers {
   }
 
   it should "serialize a model property with allowable values and ref" in {
-    val p = ModelProperty("string", false, Some("nice"), AllowableListValues(List("a","b")),Some(ModelRef("Foo","Bar")))
+    val p = ModelProperty("string", false, Some("nice"), AllowableListValues(List("a","b")),Some(ModelRef("Foo",Some("Bar"))))
-    write(p) should be ("""{"type":"string","required":false,"description":"nice","allowableValues":{"valueType":"LIST","values":["a","b"]},"items":{"$ref":"Foo","type":"Bar"}}""")
+    write(p) should be ("""{"type":"string","required":false,"description":"nice","allowableValues":{"valueType":"LIST","values":["a","b"]},"items":{"type":"Foo","$ref":"Bar"}}""")
   }
 
   it should "deserialize a model property with allowable values" in {
@@ -511,7 +529,7 @@ class AllowableValuesSerializersTest extends FlatSpec with ShouldMatchers {
     }
     """
     val json = parse(allowableValuesListString)
-    json.extract[AllowableValuesFoo] match {
+    json.extract[AllowableValues] match {
       case avl: AllowableListValues => {
         avl.valueType should be ("LIST")
         avl.values should be (List("1","2","3"))        
@@ -533,7 +551,7 @@ class AllowableValuesSerializersTest extends FlatSpec with ShouldMatchers {
     }
     """
     val json = parse(allowableValuesRangeString)
-    json.extract[AllowableValuesFoo] match {
+    json.extract[AllowableValues] match {
       case avr: AllowableRangeValues => {
         avr.min should be ("abc")
         avr.max should be ("3")        

src/test/scala/SwaggerModelTest.scala

@@ -15,7 +15,9 @@
  */
 
 import com.wordnik.swagger.model._
-import com.wordnik.swagger.codegen.util.ScalaJsonUtil
+
+import org.json4s.jackson.JsonMethods._
+import org.json4s.native.Serialization.read
 
 import org.junit.runner.RunWith
 import org.scalatest.junit.JUnitRunner
@@ -24,16 +26,15 @@ import org.scalatest.matchers.ShouldMatchers
 
 import scala.io._
 
-import scala.collection.JavaConverters._
-
 @RunWith(classOf[JUnitRunner])
 class SwaggerModelTest extends FlatSpec with ShouldMatchers {
-	val json = ScalaJsonUtil.getJsonMapper
+  implicit val formats = SwaggerSerializers.formats
+
 	behavior of "Swagger Model"
 
 	it should "deserialize ResourceListing" in {
-  		val str = Source.fromFile("src/test/resources/petstore/resources.json").mkString
+		val json = Source.fromFile("src/test/resources/petstore/resources.json").mkString
-  		val listing = json.readValue(str, classOf[ResourceListing])
+		val listing = parse(json).extract[ResourceListing]
 
 		listing.apiVersion should be ("0.2")
 		listing.swaggerVersion should be ("1.1")
@@ -48,8 +49,8 @@ class SwaggerModelTest extends FlatSpec with ShouldMatchers {
 	}
 
 	it should "deserialize ApiListing" in {
-  		val str = Source.fromFile("src/test/resources/petstore/pet.json").mkString
+		val json = Source.fromFile("src/test/resources/petstore/pet.json").mkString
-  		val apiListing = json.readValue(str, classOf[ApiListing])
+		val apiListing = parse(json).extract[ApiListing]
 
 		apiListing.apiVersion should be ("0.2")
 		apiListing.swaggerVersion should be ("1.1")
@@ -88,8 +89,8 @@ class SwaggerModelTest extends FlatSpec with ShouldMatchers {
 	}
 
 	it should "deserialize ApiListing with AllowableValues" in {
-  		val str = Source.fromFile("src/test/resources/petstore/pet.json").mkString
+		val json = Source.fromFile("src/test/resources/petstore/pet.json").mkString
-  		val apiListing = json.readValue(str, classOf[ApiListing])
+		val apiListing = parse(json).extract[ApiListing]
 		val apiMap = apiListing.apis.map(api => (api.path, api)).toMap
 		val petBaseApi = apiMap("/pet.{format}/findByStatus")
 		val findPetsByStatus = petBaseApi.operations.head
@@ -111,14 +112,14 @@ class SwaggerModelTest extends FlatSpec with ShouldMatchers {
 	}
 
   it should "maintain model property order when deserializing" in {
-      val str = Source.fromFile("src/test/resources/petstore/pet.json").mkString
+    val json = Source.fromFile("src/test/resources/petstore/pet.json").mkString
-      val apiListing = json.readValue(str, classOf[ApiListing])
+    val apiListing = parse(json).extract[ApiListing]
 
     val models = apiListing.models
     models.size should be (3)
     val pet = models("Pet")
 
-      val petProperties = pet.properties.asScala.toList
+    val petProperties = pet.properties.toList
 
     petProperties.size should be (6)
     petProperties(0)._1 should be ("tags")
@@ -130,8 +131,8 @@ class SwaggerModelTest extends FlatSpec with ShouldMatchers {
   }
 
 	it should "deserialize models" in {
-   		val str = Source.fromFile("src/test/resources/petstore/pet.json").mkString
+ 		val json = Source.fromFile("src/test/resources/petstore/pet.json").mkString
-  		val apiListing = json.readValue(str, classOf[ApiListing])
+		val apiListing = parse(json).extract[ApiListing]
 
 		val models = apiListing.models
 		models.size should be (3)
@@ -140,11 +141,11 @@ class SwaggerModelTest extends FlatSpec with ShouldMatchers {
 		pet.id should be ("Pet")
 		pet.properties.size should be (6)
 
-      val properties = pet.properties.asScala
+    val properties = pet.properties
 		val tags = properties("tags")
 		tags.`type` should be ("Array")
 		tags.items should not be (None)
-  		tags.items.get.ref should be ("Tag")
+		tags.items.get.ref should be (Some("Tag"))
 
 		val id = properties("id")
 		// id.`type` shoud be ("long")

src/test/scala/UtilsTest.scala

@@ -15,7 +15,7 @@
  */
 
 import com.wordnik.swagger.model._
-import com.wordnik.swagger.codegen.util._
+import com.wordnik.swagger.codegen.util.{ResourceExtractor, ApiExtractor, CoreUtils}
 
 import org.junit.runner.RunWith
 import org.scalatest.junit.JUnitRunner
@@ -27,8 +27,6 @@ import scala.reflect.BeanProperty
 
 @RunWith(classOf[JUnitRunner])
 class ResourceExtractorTest extends FlatSpec with ShouldMatchers {
-  val json = ScalaJsonUtil.getJsonMapper
-
   behavior of "ResourceExtractor"
   it should "get 3 apis from a resource listing" in {
     val resourceListing = ResourceExtractor.fetchListing("src/test/resources/petstore/resources.json")
@@ -39,12 +37,11 @@ class ResourceExtractorTest extends FlatSpec with ShouldMatchers {
 
 @RunWith(classOf[JUnitRunner])
 class ApiExtractorTest extends FlatSpec with ShouldMatchers {
-  val json = ScalaJsonUtil.getJsonMapper
-
   behavior of "ApiExtractor"
   it should "verify the deserialization of the store api" in {
     val resourceListing = ResourceExtractor.fetchListing("src/test/resources/petstore/resources.json")
     val docs = ApiExtractor.extractApiOperations("src/test/resources/petstore", resourceListing.apis)
+
     val m = docs.map(t => (t.resourcePath, t)).toMap
     val storeApi = m("/store")
 
@@ -68,7 +65,6 @@ class ApiExtractorTest extends FlatSpec with ShouldMatchers {
 
 @RunWith(classOf[JUnitRunner])
 class CoreUtilsTest extends FlatSpec with ShouldMatchers {
-  val json = ScalaJsonUtil.getJsonMapper
   sys.props += "fileMap" -> "src/test/resources/petstore"
 
   behavior of "CoreUtils"