serialization_xml.py

   1 #!/usr/bin/env python
   2 #
   3 # This file is part of jack_mixer
   4 #
   5 # Copyright (C) 2006 Nedko Arnaudov <nedko@arnaudov.name>
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; version 2 of the License
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19
  20 from serialization import *
  21 import xml.dom
  22 import xml.dom.minidom
  23 import xml.dom.ext
  24
  25 class xml_serialization(serialization_backend):
  26     def __init__(self):
  27         self.doctype = xml.dom.implementation.createDocumentType("pyserialzation", None, None)
  28
  29     def get_root_serialization_object(self, name):
  30         self.doc = xml.dom.implementation.createDocument(xml.dom.EMPTY_NAMESPACE, name, self.doctype)
  31         return xml_serialization_object(self.doc, self.doc.documentElement)
  32
  33     def get_root_unserialization_object(self, name):
  34         if name != self.doc.documentElement.nodeName:
  35             return None
  36         return xml_serialization_object(self.doc, self.doc.documentElement)
  37
  38     def get_child_serialization_object(self, name, backend_object):
  39         child = self.doc.createElement(name)
  40         backend_object.element.appendChild(child)
  41         return xml_serialization_object(self.doc, child)
  42
  43     def save(self, file):
  44         xml.dom.ext.PrettyPrint(self.doc, file)
  45
  46     def load(self, file):
  47         self.doc = xml.dom.minidom.parse(file)
  48         #rint "Loaded:"
  49         #xml.dom.ext.PrettyPrint(self.doc)
  50
  51 class xml_serialization_object:
  52     def __init__(self, doc, element):
  53         self.doc = doc
  54         self.element = element
  55
  56     def add_property(self, name, value):
  57         self.add_property_as_attribute(name, value)
  58
  59     def add_property_as_attribute(self, name, value):
  60         self.element.setAttribute(name, value)
  61
  62     #def add_property_as_child_element(self, name, value):
  63     #    child = self.doc.createElement(name)
  64     #    value = self.doc.createTextNode(value)
  65     #    child.appendChild(value)
  66     #    self.element.appendChild(child)
  67
  68     def get_childs(self):
  69         child_elements = self.element.childNodes
  70         childs = []
  71         for child in child_elements:
  72             if child.nodeType == child.ELEMENT_NODE:
  73                 childs.append(xml_serialization_object(self.doc, child))
  74         return childs
  75
  76     def get_properties(self):
  77         properties = self.element.attributes
  78         dictionary = {}
  79         for i in range(properties.length):
  80             dictionary[properties.item(i).name] = properties.item(i).nodeValue
  81         return dictionary
  82
  83     def serialization_name(self):
  84         return self.element.nodeName