Ignore _elseNestedEntity if entity is ruled by morph

This reimplemets commit f009e28:

 "Data which is handled by metamorph rules will NOT be passed through
 (hence the aptly named "_else"). If you want to use data in the morph
 AND pass it through, you have to add an explicit rule for this, as usual."

This behaviour is not the default, though.
It can be achieved by this morph rule:

<entity name='$name' sameEntity='true' reset='true' flushWith='$name' flushIncomplete='true'>"

where $name is the name of the entity you want to treat.

See #338.

metamorph/src/main/java/org/metafacture/metamorph/Metamorph.java

@@ -103,7 +103,7 @@ public final class Metamorph implements StreamPipe<StreamReceiver>, NamedValuePi
     private boolean elseNestedEntityStarted;
     private String currentLiteralName;
     private static final Logger LOG = LoggerFactory.getLogger(Metamorph.class);
-
+    final private Pattern literalPatternOfEntityMarker = Pattern.compile(flattener.getEntityMarker(), Pattern.LITERAL);
     protected Metamorph() {
         // package private
         init();
@@ -280,7 +280,6 @@ public void startEntity(final String name) {
         ++entityCount;
         currentEntityCount = entityCount;
         entityCountStack.push(Integer.valueOf(entityCount));
-
         flattener.startEntity(name);
     }
 
@@ -318,11 +317,10 @@ public void closeStream() {
 
     private void dispatch(final String path, final String value, final List<NamedValueReceiver> fallbackReceiver, final boolean endEntity) {
         final List<NamedValueReceiver> matchingData = dataRegistry.get(path);
-
         if (matchingData != null && !matchingData.isEmpty()) {
             send(path, value, matchingData);
         }
-        else if (fallbackReceiver != null) {
+        else if (fallbackReceiver != null && (literalPatternOfEntityMarker.split(path).length >0 && dataRegistry.get(literalPatternOfEntityMarker.split(path)[0]).isEmpty())) {
             if (endEntity) {
                 if (elseNestedEntityStarted) {
                     outputStreamReceiver.endEntity();
@@ -337,7 +335,6 @@ else if (fallbackReceiver != null) {
                         outputStreamReceiver.startEntity(entityName);
                         elseNestedEntityStarted = true;
                     }
-
                     send(currentLiteralName, value, fallbackReceiver);
                 }
                 else {

metamorph/src/test/java/org/metafacture/metamorph/TestMetamorphBasics.java

@@ -355,6 +355,69 @@ else if (separatesFromEntity) {
         );
     }
 
+    @Test
+    public void shouldNotHandleDataByElseNestedSourceIfDataBelonginToEntityIsRuledByMorph() {
+        assertMorph(receiver,
+                "<rules>" +
+                "  <entity name='USA1'>" +
+                "    <data source='USA1.Sylt' name='Hawaii' />" +
+                "  </entity>" +
+                "  <entity name='USA2' sameEntity='true' reset='true' flushWith='USA2' flushIncomplete='true'>" +
+                "    <data source='USA2.Sylt' name='Hawaii' />" +
+                "    <data source='USA2.Langeoog' name='Langeoog' />" +
+                "  </entity>" +
+                "  <entity name='USA3' sameEntity='true' reset='true' flushWith='USA3' flushIncomplete='true'>" +
+                "    <data source='USA3.Sylt' name='Hawaii' />" +
+                "  </entity>" +
+                "  <data source='_elseNested' />" +
+                "</rules>",
+                i -> {
+                    i.startRecord("1");
+                    i.literal("Shikotan", "Aekap");
+                    i.startEntity("Germany");
+                    i.literal("Langeoog", "Moin");
+                    i.literal("Baltrum", "Moin Moin");
+                    i.endEntity();
+                    i.startEntity("USA1");
+                    i.literal("Sylt", "Aloha");
+                    i.endEntity();
+                    i.startEntity("USA2");
+                    i.literal("Sylt", "Aloha");
+                    i.literal("Langeoog", "Moin");
+                    i.literal("Baltrum", "Moin Moin");
+                    i.endEntity();
+                    i.startEntity("USA2");
+                    i.literal("Langeoog", "Moin");
+                    i.literal("Baltrum", "Moin Moin");
+                    i.endEntity();
+                    i.startEntity("USA3");
+                    i.literal("Baltrum", "Moin Moin");
+                    i.endEntity();
+                    i.endRecord();
+                },
+                (o, f) -> {
+                    o.get().startRecord("1");
+                    o.get().literal("Shikotan", "Aekap");
+                    o.get().startEntity("Germany");
+                    o.get().literal("Langeoog", "Moin");
+                    o.get().literal("Baltrum", "Moin Moin");
+                    o.get().endEntity();
+                    o.get().startEntity("USA1");
+                    o.get().literal("Hawaii", "Aloha");
+                    o.get().endEntity();
+                    o.get().startEntity("USA2");
+                    o.get().literal("Hawaii", "Aloha");
+                    o.get().literal("Langeoog", "Moin");
+                    o.get().endEntity();
+                    o.get().startEntity("USA2");
+                    o.get().literal("Langeoog", "Moin");
+                    o.get().endEntity();
+                    o.get().endRecord();
+                }
+        );
+    }
+
+
     @Test
     public void shouldMatchCharacterWithQuestionMarkWildcard() {
         assertMorph(receiver,