def build_device_tree(self):
"""Retrieves the device list from the HAL daemon and builds
a tree of Device (Python) objects. The root is a virtual
device"""
device_names = self.hal_manager.GetAllDevices()
device_names.sort()
virtual_root = Device("virtual_root", None, {})
self.device_list = [virtual_root]
# first build list of Device objects
# name == device's udi
for name in device_names:
device_dbus_obj = self.bus.get_object("org.freedesktop.Hal" ,name)
# properties is the list of hal properies of "name"
properties = device_dbus_obj.GetAllProperties(dbus_interface="org.freedesktop.Hal.Device")
#print
#print "#######################"
#print properties
#print "#######################"
try:
parent_name = properties["info.parent"]
except KeyError:
# no parent, must be parent of virtual_root
parent_name = "/"
except TypeError:
print "Error: no properties for device %s"%name
continue
device = Device(name, parent_name, properties)
self.device_list.append(device)
# set parent_device and children for each Device object
for device in self.device_list:
parent_name = device.parent_name
device.parent_device = virtual_root
if parent_name!="/":
for p in self.device_list:
if p.device_name==parent_name:
device.parent_device = p
p.children.append(device)
if device!=virtual_root and device.parent_device==virtual_root:
virtual_root.children.append(device)
if device==virtual_root:
device.parent_device=None
return virtual_root
parent_name = properties["info.parent"]
except KeyError:
# no parent, must be parent of virtual_roo
parent_name = "/"
except TypeError:
print "Error: no properties for device %s"%name
continue
device = Device(name, parent_name, properties)
device_list.append(device)
#print device_list
for device in device_list:
parent_name = device.parent_name
#print parent_name
device.parent_device = virtual_root
if parent_name!="/":
for p in device_list:
if p.device_name==parent_name:
device.parent_device = p
p.children.append(device)
if device!=virtual_root and device.parent_device==virtual_root:
virtual_root.children.append(device)
if device==virtual_root:
device.parent_device=None
#device_obj = virtual_root.find_by_udi(device_udi)
if len(sys.argv) == 1:
device_udi=device_names
else:
device_udi=[sys.argv[1]]