Fix #1130

release-notes/VERSION

@@ -7,6 +7,8 @@ Project: jackson-databind
 2.7.2 (not released yet)
 
 #1129: When applying type modifiers, don't ignore container types.
+#1130: NPE in `StdDateFormat` hashCode and equals
+ (reported by Kazuki S, kazuki43zoo@github)
 #1134: Jackson 2.7 doesn't work with jdk6 due to use of `Collections.emptyIterator()`
  (reported by Timur S, saladinkzn@github)
 

src/main/java/com/fasterxml/jackson/databind/util/StdDateFormat.java

@@ -19,7 +19,7 @@
 public class StdDateFormat
     extends DateFormat
 {
-    /* TODO !!! 24-Nov-2009, tatu: Need to rewrite this class:
+    /* TODO !!! 24-Nov-2009, tatu: Should rewrite this class:
      * JDK date parsing is awfully brittle, and ISO-8601 is quite
      * permissive. The two don't mix, need to write a better one.
      */
@@ -386,7 +386,17 @@ public String toString() {
         str += "(locale: "+_locale+")";
         return str;
     }
-
+
+    @Override // since 2.7[.2], as per [databind#1130]
+    public boolean equals(Object o) {
+        return (o == this);
+    }
+
+    @Override // since 2.7[.2], as per [databind#1130]
+    public int hashCode() {
+        return System.identityHashCode(this);
+    }
+
     /*
     /**********************************************************
     /* Helper methods

src/test/java/com/fasterxml/jackson/databind/util/ISO8601DateFormatTest.java

@@ -58,4 +58,10 @@ public void testCloneObject() throws Exception {
         assertSame(df, clone);
     }
 
+    public void testHashCodeEquals() throws Exception {
+        // for [databind#1130]
+        DateFormat defaultDF = StdDateFormat.instance;
+        defaultDF.hashCode();
+        assertTrue(defaultDF.equals(defaultDF));
+    }
 }