# 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
#
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# distributed under the License is distributed on an "AS IS" BASIS,
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# See the License for the specific language governing permissions and
# limitations under the License.


class OutputValidator(object):
    """
    Base output validator class. Validators must implement
    method validate, which returns a boolean.
    """

    def validate(self):
        """
        Return True if output is valid; False otherwise.
        """
        raise NotImplementedError("validate function needs to be implemented for validators")