Fix #2599

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -1022,3 +1022,8 @@ Greg Arakelian (arakelian@github)
   * Reported #2566: `MissingNode.toString()` returns `null` (4 character token) instead
     of empty string
   (2.10.2)
+
+Tobias Preuss (johnjohndoe@github)
+  * Reported #2599: NoClassDefFoundError at DeserializationContext.<init> on Android 4.1.2
+    and Jackson 2.10.0
+  (2.10.3)

release-notes/VERSION-2.x

@@ -4,6 +4,11 @@ Project: jackson-databind
 === Releases === 
 ------------------------------------------------------------------------
 
+2.10.3 (not yet released)
+
+#2599: NoClassDefFoundError at DeserializationContext.<init> on Android 4.1.2 and Jackson 2.10.0
+ (reported by Tobias P)
+
 2.10.2 (05-Jan-2020)
 
 #2101: `FAIL_ON_NULL_FOR_PRIMITIVES` failure does not indicate field name in exception message

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

@@ -155,7 +155,10 @@ protected DeserializationContext(DeserializerFactory df) {
     protected DeserializationContext(DeserializerFactory df,
             DeserializerCache cache)
     {
-        _factory = Objects.requireNonNull(df, "Cannot pass null DeserializerFactory");
+        if (df == null) {
+            throw new NullPointerException("Cannot pass null DeserializerFactory");
+        }
+        _factory = df;
         if (cache == null) {
             cache = new DeserializerCache();
         }

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

@@ -245,8 +245,17 @@ public DefaultTypeResolverBuilder(DefaultTyping t) {
          * @since 2.10
          */
         public DefaultTypeResolverBuilder(DefaultTyping t, PolymorphicTypeValidator ptv) {
-            _appliesFor = Objects.requireNonNull(t, "Can not pass `null` DefaultTyping");
-            _subtypeValidator = Objects.requireNonNull(ptv, "Can not pass `null` PolymorphicTypeValidator");
+            _appliesFor = _requireNonNull(t, "Can not pass `null` DefaultTyping");
+            _subtypeValidator = _requireNonNull(ptv, "Can not pass `null` PolymorphicTypeValidator");
+        }
+
+        // 20-Jan-2020: as per [databind#2599] Objects.requireNonNull() from JDK7 not in all Android so
+        private static <T> T _requireNonNull(T value, String msg) {
+            // Replacement for: return Objects.requireNonNull(t, msg);
+            if (value == null) {
+                throw new NullPointerException(msg);
+            }
+            return value;
         }
 
         /**