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_r288521221
##########
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):
+ gateway = get_gateway()
+
+ if is_instance_of(java_data_type_input, gateway.jvm.TypeInformation):
+ # input is TypeInformation
+ LegacyTypeInfoDataTypeConverter = \
+
gateway.jvm.org.apache.flink.table.types.utils.LegacyTypeInfoDataTypeConverter
+ java_data_type =
LegacyTypeInfoDataTypeConverter.toDataType(java_data_type_input)
+ else:
+ # input is DataType
+ java_data_type = java_data_type_input
+
+ # Atomic Type with parameters.
+ if is_instance_of(java_data_type, gateway.jvm.AtomicDataType):
+ logical_type = java_data_type.getLogicalType()
+ conversion_clz = java_data_type.getConversionClass()
+ if is_instance_of(logical_type, gateway.jvm.CharType):
+ python_type = DataTypes.CHAR(logical_type.getLength(),
logical_type.isNullable())
Review comment:
python_type -> data_type
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