Make java.xml module optional (static)

Serialization and deserialization of javax.xml classes (module java.xml) is handled by com.fasterxml.jackson.databind.ext.OptionalHandlerFactory, it already handles classes from java.xml module as optional.

Author: Xakep_SDK

src/main/java/com/fasterxml/jackson/databind/ext/OptionalHandlerFactory.java

@@ -40,6 +40,8 @@ public class OptionalHandlerFactory implements java.io.Serializable
     // // Since 2.7, we will assume DOM classes are always found, both due to JDK 1.6 minimum
     // // and because Android (and presumably GAE) have these classes
 
+    // // 02-Nov-2020, Xakep_SDK: java.xml module classes may be missing
+    // // in actual runtime, if module java.xml is not present
     private final static Class<?> CLASS_DOM_NODE;
     private final static Class<?> CLASS_DOM_DOCUMENT;
 

src/moditect/module-info.java

@@ -7,7 +7,7 @@
     // these types were suggested as transitive, but aren't actually
     // exposed externally (only within internal APIs)
     requires java.sql;
-    requires java.xml;
+    requires static java.xml;
 
     exports com.fasterxml.jackson.databind;
     exports com.fasterxml.jackson.databind.annotation;