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From GitBox <...@apache.org>
Subject [GitHub] [flink] dianfu commented on a change in pull request #8561: [FLINK-12588][python] Add TableSchema for Python Table API.
Date Wed, 29 May 2019 11:56:42 GMT
dianfu commented on a change in pull request #8561: [FLINK-12588][python] Add TableSchema for
Python Table API.
URL: https://github.com/apache/flink/pull/8561#discussion_r288500740
 
 

 ##########
 File path: flink-python/pyflink/table/types.py
 ##########
 @@ -1273,6 +1318,190 @@ def _to_java_type(data_type):
         raise TypeError("Not supported type: %s" % data_type)
 
 
+_primitive_to_boxed_map = {'int': 'java.lang.Integer',
+                           'long': 'java.lang.Long',
+                           'byte': 'java.lang.Byte',
+                           'short': 'java.lang.Short',
+                           'char': 'java.lang.Character',
+                           'boolean': 'java.lang.Boolean',
+                           'float': 'java.lang.Float',
+                           'double': 'java.lang.Double'}
+
+
+def is_instance_of(java_data_type, java_class):
+    gateway = get_gateway()
+    if isinstance(java_class, basestring):
+        param = java_class
+    elif isinstance(java_class, JavaClass):
+        param = get_java_class(java_class)
+    elif isinstance(java_class, JavaObject):
+        if not is_instance_of(java_class, gateway.jvm.Class):
+            param = java_class.getClass()
+        else:
+            param = java_class
+    else:
+        raise TypeError(
+            "java_class must be a string, a JavaClass, or a JavaObject")
+
+    return gateway.jvm.org.apache.flink.api.python.py4j.reflection.TypeUtil.isInstanceOf(
+        param, java_data_type)
+
+
+def _to_python_type(java_data_type_input):
 
 Review comment:
   _from_java_type?
   java_data_type_input -> j_data_type

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