serialization_xml.py

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