Merge pull request Philippus#88 from Synata/master

Enable Routing in Mappings

src/main/scala/com/sksamuel/elastic4s/mapping/mappings.scala

@@ -26,6 +26,7 @@ class MappingDefinition(val `type`: String) {
   var _boostValue: Double = 0
   var _dynamic: DynamicMapping = Dynamic
   var _meta: Map[String, Any] = Map.empty
+  var _routing: Option[RoutingDefinition] = None
 
   def analyzer(analyzer: String): MappingDefinition = {
     _analyzer = Option(analyzer)
@@ -55,6 +56,10 @@ class MappingDefinition(val `type`: String) {
     this._meta = map
     this
   }
+  def routing(required: Boolean, path: Option[String] = None): MappingDefinition = {
+    this._routing = Some(RoutingDefinition(required, path))
+    this
+  }
   def source(source: Boolean): MappingDefinition = {
     this._source = source
     this
@@ -114,6 +119,14 @@ class MappingDefinition(val `type`: String) {
       source.endObject()
     }
 
+    if(_routing.isDefined) {
+      source.startObject("_routing").field("required", _routing.get.required)
+      if(_routing.get.path.isDefined) {
+        source.field("path", _routing.get.path.get)
+      }
+      source.endObject()
+    }
+
     source.endObject() // end mapping name
   }
 }
@@ -502,3 +515,8 @@ final class MultiFieldDefinition(name: String)
     source.endObject()
   }
 }
+
+case class RoutingDefinition (
+  required: Boolean,
+  path: Option[String]
+)