Source code for sttp.data.columnexpression

# ******************************************************************************************************
#  columnexpression.py - Gbtc
#
#  Copyright © 2022, Grid Protection Alliance.  All Rights Reserved.
#
#  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See
#  the NOTICE file distributed with this work for additional information regarding copyright ownership.
#  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may not use this
#  file except in compliance with the License. You may obtain a copy of the License at:
#
#      http://opensource.org/licenses/MIT
#
#  Unless agreed to in writing, the subject software distributed under the License is distributed on an
#  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the
#  License for the specific language governing permissions and limitations.
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#  Code Modification History:
#  ----------------------------------------------------------------------------------------------------
#  09/03/2022 - J. Ritchie Carroll
#       Generated original version of source code.
#
# ******************************************************************************************************

from gsf import override
from .expression import Expression
from .datacolumn import DataColumn
from .constants import ExpressionType




class ColumnExpression(Expression):
    """
    Represents a `DataColumn` expression from a `DataTable`.
    """

    def __init__(self, dataColumn: DataColumn):
        self._datacolumn = dataColumn

    @override
    @property
    def expressiontype(self) -> ExpressionType:
        """
        Gets the type of this `ColumnExpression`.
        """

        return ExpressionType.COLUMN

    @property
    def datacolumn(self) -> DataColumn:
        """
        Gets the `DataColumn` associated with this `ColumnExpression`.
        """

        return self._datacolumn