Update ScalaXB to generate default labels for XML elements

See eed3si9n/scalaxb#467 for details.

Author: hosamaly

3.3/scalaxb.scala

@@ -62,6 +62,7 @@ trait CanReadXML[A] {
 }
 
 trait CanWriteXML[A] {
+  def defaultElementLabel: Option[String] = None
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: NamespaceBinding, typeAttribute: Boolean): NodeSeq
 }
@@ -733,7 +734,7 @@ trait CanWriteChildNodes[A] extends CanWriteXML[A] {
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: scala.xml.NamespaceBinding, typeAttribute: Boolean): scala.xml.NodeSeq = {
     val elem =  scala.xml.Elem(Helper.getPrefix(namespace, scope).orNull,
-      elementLabel getOrElse { sys.error("missing element label.") },
+      elementLabel orElse defaultElementLabel getOrElse { sys.error("missing element label.") },
       writesAttribute(obj, scope),
       scope, true,
       writesChildNodes(obj, scope): _*)

3.3/xmlprotocol.scala

@@ -62,6 +62,7 @@ trait CanReadXML[A] {
 }
 
 trait CanWriteXML[A] {
+  def defaultElementLabel: Option[String] = None
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: NamespaceBinding, typeAttribute: Boolean): NodeSeq
 }
@@ -733,7 +734,7 @@ trait CanWriteChildNodes[A] extends CanWriteXML[A] {
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: scala.xml.NamespaceBinding, typeAttribute: Boolean): scala.xml.NodeSeq = {
     val elem =  scala.xml.Elem(Helper.getPrefix(namespace, scope).orNull,
-      elementLabel getOrElse { sys.error("missing element label.") },
+      elementLabel orElse defaultElementLabel getOrElse { sys.error("missing element label.") },
       writesAttribute(obj, scope),
       scope, true,
       writesChildNodes(obj, scope): _*)

3.4/scalaxb.scala

@@ -62,6 +62,7 @@ trait CanReadXML[A] {
 }
 
 trait CanWriteXML[A] {
+  def defaultElementLabel: Option[String] = None
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: NamespaceBinding, typeAttribute: Boolean): NodeSeq
 }
@@ -733,7 +734,7 @@ trait CanWriteChildNodes[A] extends CanWriteXML[A] {
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: scala.xml.NamespaceBinding, typeAttribute: Boolean): scala.xml.NodeSeq = {
     val elem =  scala.xml.Elem(Helper.getPrefix(namespace, scope).orNull,
-      elementLabel getOrElse { sys.error("missing element label.") },
+      elementLabel orElse defaultElementLabel getOrElse { sys.error("missing element label.") },
       writesAttribute(obj, scope),
       scope, true,
       writesChildNodes(obj, scope): _*)

3.4/xmlprotocol.scala

@@ -62,6 +62,7 @@ trait CanReadXML[A] {
 }
 
 trait CanWriteXML[A] {
+  def defaultElementLabel: Option[String] = None
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: NamespaceBinding, typeAttribute: Boolean): NodeSeq
 }
@@ -733,7 +734,7 @@ trait CanWriteChildNodes[A] extends CanWriteXML[A] {
   def writes(obj: A, namespace: Option[String], elementLabel: Option[String],
       scope: scala.xml.NamespaceBinding, typeAttribute: Boolean): scala.xml.NodeSeq = {
     val elem =  scala.xml.Elem(Helper.getPrefix(namespace, scope).orNull,
-      elementLabel getOrElse { sys.error("missing element label.") },
+      elementLabel orElse defaultElementLabel getOrElse { sys.error("missing element label.") },
       writesAttribute(obj, scope),
       scope, true,
       writesChildNodes(obj, scope): _*)

3.5/scalaxb.scala

@@ -46,7 +46,7 @@ The schemas used to generate the classes in this project are available in the [s
 ## Generated Sources
 
 The source files were generated using an
-[unreleased version of ScalaXB](https://github.com/eed3si9n/scalaxb/archive/5d0eea5a6c4d713976c9b86cc2cb691d0f83e137.zip)
+[unreleased version of ScalaXB](https://github.com/eed3si9n/scalaxb/archive/a54acf3d30f081dba5c12e7217556199952b7c2d.zip)
 that was built from source. Hopefully, it will be released in the main repository soon.
 
 The following command was used to generate the files for each version: