90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2017 Nick Hall
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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"""
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Serialization utilities for Gramps.
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"""
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#------------------------------------------------------------------------
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#
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# Python modules
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#
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#------------------------------------------------------------------------
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import json
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#------------------------------------------------------------------------
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#
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# Gramps modules
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#
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#------------------------------------------------------------------------
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import gramps.gen.lib as lib
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def __default(obj):
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obj_dict = {'_class': obj.__class__.__name__}
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if isinstance(obj, lib.GrampsType):
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obj_dict['string'] = getattr(obj, 'string')
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if isinstance(obj, lib.Date):
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if obj.is_empty() and not obj.text:
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return None
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for key, value in obj.__dict__.items():
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if not key.startswith('_'):
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obj_dict[key] = value
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for key, value in obj.__class__.__dict__.items():
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if isinstance(value, property):
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if key != 'year':
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obj_dict[key] = getattr(obj, key)
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return obj_dict
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def __object_hook(obj_dict):
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obj = getattr(lib, obj_dict['_class'])()
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for key, value in obj_dict.items():
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if key != '_class':
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if key in ('dateval', 'rect') and value is not None:
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value = tuple(value)
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if key == 'ranges':
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value = [tuple(item) for item in value]
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setattr(obj, key, value)
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if obj_dict['_class'] == 'Date':
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if obj.is_empty() and not obj.text:
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return None
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return obj
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def to_json(obj):
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"""
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Encode a Gramps object in JSON format.
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:param obj: The object to be serialized.
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:type obj: object
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:returns: A JSON string.
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:rtype: str
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"""
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return json.dumps(obj, default=__default, ensure_ascii=False)
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def from_json(data):
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"""
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Decode JSON data into a Gramps object hierarchy.
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:param data: The JSON string to be unserialized.
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:type data: str
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:returns: A Gramps object.
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:rtype: object
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"""
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return json.loads(data, object_hook=__object_hook)
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