Further cleanup wrt #531

src/main/java/com/fasterxml/jackson/dataformat/xml/XmlFactory.java

@@ -165,7 +165,7 @@ protected XmlFactory(XmlFactoryBuilder b)
         _cfgNameForTextElement = b.nameForTextElement();
         _xmlInputFactory = b.xmlInputFactory();
         _xmlOutputFactory = b.xmlOutputFactory();
-        _nameProcessor = b.xmlTagProcessor();
+        _nameProcessor = b.xmlNameProcessor();
         _initFactories(_xmlInputFactory, _xmlOutputFactory);
     }
 
@@ -336,11 +336,11 @@ public int getFormatGeneratorFeatures() {
         return _xmlGeneratorFeatures;
     }
 
-    public XmlNameProcessor getXmlTagProcessor() {
+    public XmlNameProcessor getXmlNameProcessor() {
         return _nameProcessor;
     }
 
-    public void setXmlTagProcessor(XmlNameProcessor processor) {
+    public void setXmlNameProcessor(XmlNameProcessor processor) {
         _nameProcessor = processor;
     }
 

src/main/java/com/fasterxml/jackson/dataformat/xml/XmlFactoryBuilder.java

@@ -142,7 +142,7 @@ protected ClassLoader staxClassLoader() {
                 getClass().getClassLoader() : _classLoaderForStax;
     }
 
-    public XmlNameProcessor xmlTagProcessor() {
+    public XmlNameProcessor xmlNameProcessor() {
         return _nameProcessor;
     }
 
@@ -270,7 +270,7 @@ public XmlFactoryBuilder staxClassLoader(ClassLoader cl) {
     /**
      * @since 2.14
      */
-    public XmlFactoryBuilder xmlTagProcessor(XmlNameProcessor nameProcessor) {
+    public XmlFactoryBuilder xmlNameProcessor(XmlNameProcessor nameProcessor) {
         _nameProcessor = nameProcessor;
         return _this();
     }

src/main/java/com/fasterxml/jackson/dataformat/xml/XmlMapper.java

@@ -292,7 +292,7 @@ public XmlMapper setDefaultUseWrapper(boolean state) {
      * @since 2.14
      */
     public void setXmlNameProcessor(XmlNameProcessor processor) {
-        ((XmlFactory)_jsonFactory).setXmlTagProcessor(processor);
+        ((XmlFactory)_jsonFactory).setXmlNameProcessor(processor);
     }
 
     /*

src/main/java/com/fasterxml/jackson/dataformat/xml/XmlNameProcessors.java

@@ -40,7 +40,7 @@ private XmlNameProcessors() {
      * @since 2.14
      */
     public static XmlNameProcessor newPassthroughProcessor() {
-        return new PassthroughTagProcessor();
+        return new PassthroughProcessor();
     }
 
     /**
@@ -157,10 +157,10 @@ public static XmlNameProcessor newAlwaysOnBase64Processor() {
         return new AlwaysOnBase64NameProcessor();
     }
 
-    static class PassthroughTagProcessor implements XmlNameProcessor {
+    static class PassthroughProcessor implements XmlNameProcessor {
         private static final long serialVersionUID = 1L;
 
-        public PassthroughTagProcessor() { }
+        public PassthroughProcessor() { }
 
         @Override
         public void encodeName(XmlName name) { }

src/test/java/com/fasterxml/jackson/dataformat/xml/deser/creator/NoArgCtorDeser491Test.java

@@ -18,16 +18,11 @@
  * token (for consistency with how XML is mapper to tokens); this leads to deserialization
  * attempting to use "empty Object" construction which expects availability of the
  * default constructor.
- * To resolve the issue there are at least two possible ways:
- *<ul>
- * <li>Try to make root element appears as START-OBJECT/END-OBJECT sequence instead of VALUE_STRING
- *  </li>
- * <li>Change {@code StdDeserializer} (from jackson-databind) to allow use of "properties-based"
- *   Creator as well -- passing equivalent of all-absent values. This could either be for all
- *   content, or just for specific formats (using a {@code StreamReadFeature} to detect).
- *  </li>
- *</ul>
- * Either approach could work, although former could cause other kinds of regression.
+ *<p>
+ * Jackson 2.14 solved this issue by reverting earlier changes so that empty element
+ * is exposed as simple START_OBJECT/END_OBJECT sequence (that is, empty Object).
+ * Use cases where (non-empty) element needs to map to Scalar types is now handled
+ * with mechanism introduced in 2.13.
  */
 public class NoArgCtorDeser491Test extends XmlTestBase
 {
@@ -101,12 +96,16 @@ public void test_empty_Problem_JSON_deserialization() throws Exception
     public void test_empty_Problem_XML_deserialization() throws Exception
     {
         Problem problem = XML_MAPPER.readValue(
-                // This WOULD work:
-//                "<problem><status>500</status></problem>",
-                // but not missing
                 "<problem />",
                 Problem.class);
         assertEquals(Problem.DEFAULT_TYPE, problem.getType());
         assertEquals(Problem.DEFAULT_STATUS, problem.getStatus());
+
+        // Also ensure variations of empty do not vary
+        problem = XML_MAPPER.readValue(
+                "<problem>\n</problem>",
+                Problem.class);
+        assertEquals(Problem.DEFAULT_TYPE, problem.getType());
+        assertEquals(Problem.DEFAULT_STATUS, problem.getStatus());
     }
 }