move del to javaparams

Author: techaddict

python/pyspark/ml/wrapper.py

@@ -33,10 +33,6 @@ def __init__(self, java_obj=None):
         super(JavaWrapper, self).__init__()
         self._java_obj = java_obj
 
-    def __del__(self):
-        if SparkContext._active_spark_context:
-            SparkContext._active_spark_context._gateway.detach(self._java_obj)
-
     @classmethod
     def _create_from_java_class(cls, java_class, *args):
         """
@@ -75,6 +71,10 @@ class JavaParams(JavaWrapper, Params):
 
     __metaclass__ = ABCMeta
 
+    def __del__(self):
+        if SparkContext._active_spark_context:
+            SparkContext._active_spark_context._gateway.detach(self._java_obj)
+
     def _make_java_param_pair(self, param, value):
         """
         Makes a Java parm pair.