# Copyright (c) 2019, MD2K Center of Excellence
# - Nasir Ali <nasir.ali08@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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[docs]class DataDescriptor():
def __init__(self):
"""
Constructor
"""
self.name = None
self.type = None
self.attributes = {}
[docs] def set_attribute(self, key, value):
"""
Attributes field is option in metadata object. Arbitrary number or attributes could be attached to a DataDescriptor
Args:
key (str): key of an attribute
value (str): value of an attribute
Returns:
self:
Raises:
ValueError: if key/value are missing
"""
if key is None or key=="" or value is None or value=="":
raise ValueError("Key and/or value cannot be None or empty.")
self.attributes[key]=value
return self
[docs] def set_name(self, value):
"""
Name of data descriptor
Args:
value (str): name
Returns:
self:
"""
self.name = value
return self
[docs] def set_type(self, value:str):
"""
Type of a data descriptor
Args:
value (str): type
Returns:
self:
"""
self.type = value
return self
[docs] def from_json(self, obj):
"""
Cast DataDescriptor class object into json
Args:
obj (DataDescriptor): object of a data descriptor class
Returns:
self:
"""
self.__dict__ = obj
return self