74 lines
2.0 KiB
Python
74 lines
2.0 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2006 Donald N. Allingham
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# $Id$
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"""
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Base Reference class for GRAMPS.
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"""
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#-------------------------------------------------------------------------
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#
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# RefBase class
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#
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#-------------------------------------------------------------------------
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class RefBase:
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"""
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Base reference class to manage references to other objects.
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Any *Ref class should derive from this class.
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"""
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def __init__(self, source=None):
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if source:
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self.ref = source.ref
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else:
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self.ref = None
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def serialize(self):
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"""
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Convert the object to a serialized tuple of data.
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"""
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return self.ref
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def unserialize(self, data):
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"""
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Convert a serialized tuple of data to an object.
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"""
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self.ref = str(data)
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return self
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def get_referenced_handles(self):
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"""
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Returns the list of (classname, handle) tuples for all directly
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referenced primary objects.
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@return: Returns the list of (classname, handle) tuples for referenced
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objects.
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@rtype: list
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"""
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assert False, "Must be overridden in the derived class"
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def set_reference_handle(self, val):
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self.ref = val
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def get_reference_handle(self):
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return self.ref
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