Systematiki/Database/Dummy.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 """
   4 Systematiki Dummy Database.
   5
   6 - Implements documents and links to objects.
   7 """
   8
   9 # Copyright (C) 2007  Felix Rabe <public@felixrabe.textdriven.com>
  10
  11 # This library is free software; you can redistribute it and/or
  12 # modify it under the terms of the GNU Lesser General Public
  13 # License as published by the Free Software Foundation; either
  14 # version 2.1 of the License, or (at your option) any later version.
  15
  16 # This library is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 # Lesser General Public License for more details.
  20
  21 # You should have received a copy of the GNU Lesser General Public License
  22 # along with this library; if not, write to the Free Software Foundation,
  23 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  24
  25 # Recommended line length or text width: 75 characters.
  26
  27 from base64 import decodestring as bdec
  28 import StringIO
  29 from zlib import decompress as zdec
  30
  31 from Systematiki.ElementTree import ET
  32 from Systematiki.Database.Classes import *
  33 from Systematiki.Database import Interface
  34 from Systematiki.DeferredReturn import DeferredReturn
  35
  36
  37 class Database(Interface.Database):
  38
  39     def __init__(self, config):
  40         super(Database, self).__init__()
  41         self.documents = {}
  42
  43         # I use base64'ed zlib here to make the contained XML documents
  44         # more compact.  Feel free to decode using
  45         # zlib.decompress(base64.decodestring(s)) on your own.
  46
  47         d = lambda s: self.store_document(Document(ET.XML(zdec(bdec(s)))))
  48
  49         # TODO list
  50         d("""
  51             eJxNjLEOgjAURfd+xUt3QDcHWhI1cTEhURLnSos0lD7SPoj+vcSgeMd7Tk5e
  52             PHsHkwnRohd8m244GF+jtv4h+EhNsuOFZCwPpgFCwTXWAZG4rMpjCc5GYuI7
  53             xhI4Ifzca4vDMId4JtMZHZRzKzxbP0aoMEzK6bgoNwwdoP9LvCKZXpHt7KJc
  54             jNJArVmdvb0786F5Nn+SvQFKDUDM
  55         """)
  56
  57         # People I know
  58         d("""
  59             eJylk+9OwjAUxb/3KW760YgyQAXDRjTGxATF+OcBynaRhnJL2qrs7a1xbOsM
  60             gtpkW7adnl/uOdtwtF4qeENjpaaYR0dtDkipziS9xPzVzVp9PkoYGxqcgdMx
  61             z3RqtHY8uUe9Ugg3sCD9zuL6YmxCKgdNCNrvmqM/DCLYuX6nDcyCtGBQKK8k
  62             TNFaYfJDWHkQGjH1T/1GpoR1n0ZHjD2TkrTADHgm7UqJnG+sWGvrYqwF98IZ
  63             mS7gxjkkBn4dwKU2dA6dM7jy6OUUDUSDfs+LLzIjBcEd2kAZ9WCSOl0IT7zw
  64             GpVcw4OYYiDswq0w6XyjGkt6tfCkzZtQWWjZ6dfhpwPGxsV8pKllcSnIyXSf
  65             IYs5y46CgXkSUEvRVBo350kzguGxFyRf57pnlcsOw0ZS2/yq+Hb41QPdZham
  66             vGviRu6BadlBuesxt8534eRCcii+vJiX9RwnezT053aq365z5lHV+2XUCe7z
  67             z+78k3/XVxGjXoPY/kY8+YG4d8EVsRsCu7/i/eobqOXa35Xr6aBJLS4fIoyF
  68             eg==
  69         """)
  70
  71     def close(self):
  72         deferred_return = DeferredReturn()
  73         deferred_return.callback(self)
  74         return deferred_return
  75
  76     def connect_client(self):
  77         deferred_return = DeferredReturn()
  78         deferred_return.callback(self)
  79         return deferred_return
  80
  81     def connect_server(self):
  82         deferred_return = DeferredReturn()
  83         deferred_return.callback(self)
  84         return deferred_return
  85
  86     def retrieve_document(self, document_uuid):
  87         deferred_return = DeferredReturn()
  88         for (uuid, document) in self.documents.iteritems():
  89             if uuid == document_uuid:
  90                 deferred_return.callback(self, document)
  91                 return deferred_return
  92         deferred_return.callback(self, None)
  93         return deferred_return
  94
  95     def retrieve_object(self, obj_name):
  96         deferred_return = DeferredReturn()
  97         obj = Object(obj_name)
  98         for document in self.documents.itervalues():
  99             for link in document.iterrefs(obj_name):
 100                 obj.add_ref(document, link)
 101         if not obj.refs: obj = None
 102         deferred_return.callback(self, obj)
 103         return deferred_return
 104
 105     def store_document(self, document):
 106         self.documents[document.uuid] = document
 107         deferred_return = DeferredReturn()
 108         deferred_return.callback(self)
 109         return deferred_return
 110