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import typing as t
class DataType:
def __repr__(self) -> str:
return self.__class__.__name__ + "()"
def __hash__(self) -> int:
return hash(str(self))
def __eq__(self, other: t.Any) -> bool:
return isinstance(other, self.__class__) and self.__dict__ == other.__dict__
def __ne__(self, other: t.Any) -> bool:
return not self.__eq__(other)
def __str__(self) -> str:
return self.typeName()
@classmethod
def typeName(cls) -> str:
return cls.__name__[:-4].lower()
def simpleString(self) -> str:
return str(self)
def jsonValue(self) -> t.Union[str, t.Dict[str, t.Any]]:
return str(self)
class DataTypeWithLength(DataType):
def __init__(self, length: int):
self.length = length
def __repr__(self) -> str:
return f"{self.__class__.__name__}({self.length})"
def __str__(self) -> str:
return f"{self.typeName()}({self.length})"
class StringType(DataType):
pass
class CharType(DataTypeWithLength):
pass
class VarcharType(DataTypeWithLength):
pass
class BinaryType(DataType):
pass
class BooleanType(DataType):
pass
class DateType(DataType):
pass
class TimestampType(DataType):
pass
class TimestampNTZType(DataType):
@classmethod
def typeName(cls) -> str:
return "timestamp_ntz"
class DecimalType(DataType):
def __init__(self, precision: int = 10, scale: int = 0):
self.precision = precision
self.scale = scale
def simpleString(self) -> str:
return f"decimal({self.precision}, {self.scale})"
def jsonValue(self) -> str:
return f"decimal({self.precision}, {self.scale})"
def __repr__(self) -> str:
return f"DecimalType({self.precision}, {self.scale})"
class DoubleType(DataType):
pass
class FloatType(DataType):
pass
class ByteType(DataType):
def __str__(self) -> str:
return "tinyint"
class IntegerType(DataType):
def __str__(self) -> str:
return "int"
class LongType(DataType):
def __str__(self) -> str:
return "bigint"
class ShortType(DataType):
def __str__(self) -> str:
return "smallint"
class ArrayType(DataType):
def __init__(self, elementType: DataType, containsNull: bool = True):
self.elementType = elementType
self.containsNull = containsNull
def __repr__(self) -> str:
return f"ArrayType({self.elementType, str(self.containsNull)}"
def simpleString(self) -> str:
return f"array<{self.elementType.simpleString()}>"
def jsonValue(self) -> t.Dict[str, t.Any]:
return {
"type": self.typeName(),
"elementType": self.elementType.jsonValue(),
"containsNull": self.containsNull,
}
class MapType(DataType):
def __init__(self, keyType: DataType, valueType: DataType, valueContainsNull: bool = True):
self.keyType = keyType
self.valueType = valueType
self.valueContainsNull = valueContainsNull
def __repr__(self) -> str:
return f"MapType({self.keyType}, {self.valueType}, {str(self.valueContainsNull)})"
def simpleString(self) -> str:
return f"map<{self.keyType.simpleString()}, {self.valueType.simpleString()}>"
def jsonValue(self) -> t.Dict[str, t.Any]:
return {
"type": self.typeName(),
"keyType": self.keyType.jsonValue(),
"valueType": self.valueType.jsonValue(),
"valueContainsNull": self.valueContainsNull,
}
class StructField(DataType):
def __init__(
self, name: str, dataType: DataType, nullable: bool = True, metadata: t.Optional[t.Dict[str, t.Any]] = None
):
self.name = name
self.dataType = dataType
self.nullable = nullable
self.metadata = metadata or {}
def __repr__(self) -> str:
return f"StructField('{self.name}', {self.dataType}, {str(self.nullable)})"
def simpleString(self) -> str:
return f"{self.name}:{self.dataType.simpleString()}"
def jsonValue(self) -> t.Dict[str, t.Any]:
return {
"name": self.name,
"type": self.dataType.jsonValue(),
"nullable": self.nullable,
"metadata": self.metadata,
}
class StructType(DataType):
def __init__(self, fields: t.Optional[t.List[StructField]] = None):
if not fields:
self.fields = []
self.names = []
else:
self.fields = fields
self.names = [f.name for f in fields]
def __iter__(self) -> t.Iterator[StructField]:
return iter(self.fields)
def __len__(self) -> int:
return len(self.fields)
def __repr__(self) -> str:
return f"StructType({', '.join(str(field) for field in self)})"
def simpleString(self) -> str:
return f"struct<{', '.join(x.simpleString() for x in self)}>"
def jsonValue(self) -> t.Dict[str, t.Any]:
return {"type": self.typeName(), "fields": [x.jsonValue() for x in self]}
def fieldNames(self) -> t.List[str]:
return list(self.names)
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