Backport #913 fix in 2.6

Author: cowtowncoder

release-notes/CREDITS

@@ -309,7 +309,11 @@ Andy Wilkinson (wilkinsona@github)
    (2.6.1)
 
 lufe66@github:
-
   * Reported 894: When using withFactory on ObjectMapper, the created Factory has a TypeParser
     which still has the original Factory
    (2.6.2)
+
+Daniel Walker (dsw2127@github)
+  * Reported, contributed fix for #913: `ObjectMapper.copy()` does not preserve
+   `MappingJsonFactory` features
+   (2.6.2)

release-notes/VERSION

@@ -10,6 +10,8 @@ Project: jackson-databind
   which still has the original Factory
  (reported by lufe66@github)
 #899: Problem serializing `ObjectReader` (and possibly `ObjectMapper`)
+#913: ObjectMapper.copy does not preserve MappingJsonFactory features
+ (reported, fixed by Daniel W)
 
 2.6.1 (09-Aug-2015)
 

src/main/java/com/fasterxml/jackson/databind/MappingJsonFactory.java

@@ -33,6 +33,14 @@ public MappingJsonFactory(ObjectMapper mapper)
         }
     }
 
+    public MappingJsonFactory(JsonFactory src, ObjectMapper mapper)
+    {
+        super(src, mapper);
+        if (mapper == null) {
+          setCodec(new ObjectMapper(this));
+        }
+    }
+
     /**
      * We'll override the method to return more specific type; co-variance
      * helps here
@@ -46,7 +54,7 @@ public JsonFactory copy()
     {
         _checkInvalidCopy(MappingJsonFactory.class);
         // note: as with base class, must NOT copy mapper reference
-        return new MappingJsonFactory(null);
+        return new MappingJsonFactory(this, null);
     }
 
     /*

src/test/java/com/fasterxml/jackson/databind/ObjectMapperTest.java

@@ -159,6 +159,9 @@ public void testCopy() throws Exception
         assertFalse(m.isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
         InjectableValues inj = new InjectableValues.Std();
         m.setInjectableValues(inj);
+        assertFalse(m.isEnabled(JsonParser.Feature.ALLOW_COMMENTS));
+        m.enable(JsonParser.Feature.ALLOW_COMMENTS);
+        assertTrue(m.isEnabled(JsonParser.Feature.ALLOW_COMMENTS));
 
         // // First: verify that handling of features is decoupled:
 
@@ -193,6 +196,10 @@ public void testCopy() throws Exception
         assertEquals(0, m2.getSerializationConfig().mixInCount());
         assertEquals(1, m.getDeserializationConfig().mixInCount());
         assertEquals(0, m2.getDeserializationConfig().mixInCount());
+
+        // [Issue#913]: Ensure JsonFactory Features copied
+        assertTrue(m2.isEnabled(JsonParser.Feature.ALLOW_COMMENTS));
+        
     }
 
     public void testAnnotationIntrospectorCopyin()