unknowntpo commented on code in PR #7357: URL: https://github.com/apache/gravitino/pull/7357#discussion_r2160024962
########## clients/client-python/gravitino/dto/rel/column_dto.py: ########## @@ -0,0 +1,163 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +from __future__ import annotations + +from dataclasses import dataclass, field +from typing import List, Optional, Union, cast + +from dataclasses_json import DataClassJsonMixin, config + +from gravitino.api.column import Column +from gravitino.api.expressions.expression import Expression +from gravitino.api.types.json_serdes.type_serdes import TypeSerdes +from gravitino.api.types.type import Type +from gravitino.api.types.types import Types +from gravitino.dto.rel.expressions.literal_dto import LiteralDTO +from gravitino.utils.precondition import Precondition + + +@dataclass +class ColumnDTO(Column, DataClassJsonMixin): + """Represents a Model DTO (Data Transfer Object).""" + + _name: str = field(metadata=config(field_name="name")) + """The name of the column.""" + + _data_type: Type = field( + metadata=config( + field_name="type", + encoder=TypeSerdes.serialize, + decoder=TypeSerdes.deserialize, + ) + ) + """The data type of the column.""" + + _comment: str = field(metadata=config(field_name="comment")) + """The comment associated with the column.""" + + # TODO: We shall specify encoder/decoder in the future PR. They're now dummy serdes. + _default_value: Optional[Union[Expression, List[Expression]]] = field( + default_factory=lambda: Column.DEFAULT_VALUE_NOT_SET, + metadata=config( + field_name="defaultValue", + encoder=lambda _: None, + decoder=lambda _: Column.DEFAULT_VALUE_NOT_SET, + exclude=lambda value: value is None + or value is Column.DEFAULT_VALUE_NOT_SET, + ), + ) + """The default value of the column.""" + + _nullable: bool = field(default=True, metadata=config(field_name="nullable")) + """Whether the column value can be null.""" + + _auto_increment: bool = field( + default=False, metadata=config(field_name="autoIncrement") + ) + """Whether the column is an auto-increment column.""" + + def name(self) -> str: + return self._name + + def data_type(self) -> Type: + return self._data_type + + def comment(self) -> str: + return self._comment + + def nullable(self) -> bool: + return self._nullable + + def auto_increment(self) -> bool: + return self._auto_increment + + def default_value(self) -> Union[Expression, List[Expression]]: + return self._default_value + + def validate(self) -> None: + Precondition.check_string_not_empty( + self._name, "Column name cannot be null or empty." + ) + Precondition.check_argument( + self._data_type is not None, "Column data type cannot be null." + ) + non_nullable_condition = ( + not self._nullable + and isinstance(self._default_value, LiteralDTO) + and cast(LiteralDTO, self._default_value).data_type() + == Types.NullType.get() + ) + Precondition.check_argument( + not non_nullable_condition, + f"Column cannot be non-nullable with a null default value: {self._name}.", + ) + + @classmethod + def builder( + cls, + name: str, + data_type: Type, + comment: str, + nullable: bool = True, + auto_increment: bool = False, + default_value: Optional[Expression] = None, + ) -> ColumnDTO: + Precondition.check_string_not_empty( Review Comment: I think this should be aligned in this PR, because I don't want the behavior be different between Python and Java. ########## clients/client-python/gravitino/dto/rel/partition_utils.py: ########## @@ -0,0 +1,57 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +from itertools import filterfalse +from typing import TYPE_CHECKING, List + +from gravitino.utils.precondition import Precondition + +if TYPE_CHECKING: + from gravitino.dto.rel.column_dto import ColumnDTO + + +class PartitionUtils: + """Validates the existence of the partition field in the table.""" + + @staticmethod + def validate_field_existence( + columns: List["ColumnDTO"], field_name: List[str] + ) -> None: + """Validates the existence of the partition field in the table. + + Args: + columns (List[ColumnDTO]): The columns of the table. + field_name (List[str]): The name of the field to validate. + + Raises: + IllegalArgumentException: If the field does not exist in the table, this exception is thrown. + """ + Precondition.check_argument( Review Comment: ok -- This is an automated message from the Apache Git Service. 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