Java DSL (#714)

* Java DSL

* Update ScalaModule.java

* add tests

* Update ScalaModule.java

Author: pjfanning

build.sbt

@@ -78,7 +78,8 @@ scalacOptions ++= {
 // and we use it.
 //scalacOptions in (Compile, compile) += "-Xfatal-warnings"
 
-compileOrder := CompileOrder.JavaThenScala
+Compile / compileOrder := CompileOrder.Mixed
+Test / compileOrder := CompileOrder.JavaThenScala
 
 Compile / unmanagedSourceDirectories ++= {
   if (scalaReleaseVersion.value > 2) {

src/main/java/com/fasterxml/jackson/module/scala/javadsl/DefaultScalaModule.java

@@ -0,0 +1,9 @@
+package com.fasterxml.jackson.module.scala.javadsl;
+
+public final class DefaultScalaModule {
+    public static com.fasterxml.jackson.module.scala.JacksonModule getInstance() {
+        return com.fasterxml.jackson.module.scala.DefaultScalaModule$.MODULE$;
+    }
+
+    private DefaultScalaModule() { }
+}

src/main/java/com/fasterxml/jackson/module/scala/javadsl/ScalaModule.java

@@ -0,0 +1,78 @@
+package com.fasterxml.jackson.module.scala.javadsl;
+
+import com.fasterxml.jackson.module.scala.*;
+import com.fasterxml.jackson.module.scala.deser.*;
+import com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospectorModule;
+import com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospectorModule$;
+
+public final class ScalaModule {
+    public static com.fasterxml.jackson.module.scala.ScalaModule.Builder builder() {
+        return ScalaModule$.MODULE$.builder();
+    }
+
+    public static EitherModule eitherModule() {
+        return EitherModule$.MODULE$;
+    }
+
+    /**
+     * EnumModule is not available in Scala 2.x - as it relates to Scala 3 <code>enum</code>s.
+     */
+    public static JacksonModule enumModule() {
+        try {
+            Class<?> objectClass = Class.forName("com.fasterxml.jackson.module.scala.EnumModule$");
+            return (JacksonModule) objectClass.getDeclaredField("MODULE$").get(null);
+        } catch (Throwable t) {
+            return null;
+        }
+    }
+
+    public static EnumerationModule enumerationModule() {
+        return EnumerationModule$.MODULE$;
+    }
+
+    public static IteratorModule iteratorModule() {
+        return IteratorModule$.MODULE$;
+    }
+
+    public static IterableModule iterableModule() {
+        return IterableModule$.MODULE$;
+    }
+
+    public static OptionModule optionModule() {
+        return OptionModule$.MODULE$;
+    }
+
+    public static TupleModule tupleModule() {
+        return TupleModule$.MODULE$;
+    }
+
+    public static MapModule mapModule() {
+        return MapModule$.MODULE$;
+    }
+
+    public static SetModule setModule() {
+        return SetModule$.MODULE$;
+    }
+
+    public static SymbolModule symbolModule() {
+        return SymbolModule$.MODULE$;
+    }
+
+    public static ScalaAnnotationIntrospectorModule scalaAnnotationIntrospectorModule() {
+        return ScalaAnnotationIntrospectorModule$.MODULE$;
+    }
+
+    public static ScalaNumberDeserializersModule scalaNumberDeserializersModule() {
+        return ScalaNumberDeserializersModule$.MODULE$;
+    }
+
+    public static ScalaObjectDeserializerModule scalaObjectDeserializerModule() {
+        return ScalaObjectDeserializerModule$.MODULE$;
+    }
+
+    public static UntypedObjectDeserializerModule untypedObjectDeserializerModule() {
+        return UntypedObjectDeserializerModule$.MODULE$;
+    }
+
+    private ScalaModule() { }
+}

src/test/scala-3/com/fasterxml/jackson/module/scala/javadsl/Scala3ModuleJavaDslTest.scala

@@ -0,0 +1,10 @@
+package com.fasterxml.jackson.module.scala.javadsl
+
+import com.fasterxml.jackson.module.scala.{ BaseSpec, EnumModule }
+
+class Scala3ModuleJavaDslTest extends BaseSpec {
+  "Java DSL ScalaModule" should "support EnumModule (Scala 3 only)" in {
+    val module = ScalaModule.enumModule()
+    module shouldBe an[EnumModule]
+  }
+}

src/test/scala/com/fasterxml/jackson/module/scala/javadsl/ScalaModuleJavaDslTest.scala

@@ -0,0 +1,34 @@
+package com.fasterxml.jackson.module.scala.javadsl
+
+import com.fasterxml.jackson.module.scala._
+import com.fasterxml.jackson.module.scala.deser.UntypedObjectDeserializerModule
+
+class ScalaModuleJavaDslTest extends BaseSpec {
+  "Java DSL ScalaModule" should "support EnumerationModule" in {
+    javadsl.ScalaModule.enumerationModule() shouldBe an[EnumerationModule]
+  }
+  it should "support EitherModule" in {
+    javadsl.ScalaModule.eitherModule() shouldBe an[EitherModule]
+  }
+  it should "support IterableModule" in {
+    javadsl.ScalaModule.iterableModule() shouldBe an[IterableModule]
+  }
+  it should "support IteratorModule" in {
+    javadsl.ScalaModule.iteratorModule() shouldBe an[IteratorModule]
+  }
+  it should "support OptionModule" in {
+    javadsl.ScalaModule.optionModule() shouldBe an[OptionModule]
+  }
+  it should "support SetModule" in {
+    javadsl.ScalaModule.setModule() shouldBe a[SetModule]
+  }
+  it should "support MapModule" in {
+    javadsl.ScalaModule.mapModule() shouldBe a[MapModule]
+  }
+  it should "support TupleModule" in {
+    javadsl.ScalaModule.tupleModule() shouldBe a[TupleModule]
+  }
+  it should "support UntypedObjectDeserializerModule" in {
+    javadsl.ScalaModule.untypedObjectDeserializerModule() shouldBe an[UntypedObjectDeserializerModule]
+  }
+}