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# SPDX-FileCopyrightText: All Contributors to the PyTango project
# SPDX-License-Identifier: LGPL-3.0-or-later
"""
This is an internal PyTango module.
"""
__all__ = (
"get_class",
"get_classes",
"get_cpp_class",
"get_cpp_classes",
"get_constructed_class",
"get_constructed_classes",
"class_factory",
"delete_class_list",
"class_list",
"cpp_class_list",
"constructed_class",
)
__docformat__ = "restructuredtext"
# list of tuple<DeviceClass class, DeviceImpl class, tango device class name>
class_list = []
# list of tuple<DeviceClass name, tango device class name>
cpp_class_list = []
# list of DeviceClass objects, one for each registered device class
constructed_class = []
def get_classes():
global class_list
return class_list
def get_class(name):
for klass_info in get_classes():
if klass_info[2] == name:
return klass_info
return None
def get_class_by_class(klass):
for klass_info in get_classes():
if klass_info[0] == klass:
return klass_info
return None
def get_cpp_classes():
global cpp_class_list
return cpp_class_list
def get_cpp_class(name):
for klass_info in get_cpp_classes():
if klass_info[1] == name:
return klass_info
return None
def get_constructed_classes():
global constructed_class
return constructed_class
def get_constructed_class(name):
for klass in get_constructed_classes():
if klass.get_name() == name:
return klass
return None
def get_constructed_class_by_class(klass):
for k in get_constructed_classes():
if k.__class__ == klass:
return k
return None
#
# A method to delete Tango classes from Python
#
def delete_class_list():
global constructed_class
if len(constructed_class) != 0:
del constructed_class[:]
#
# A generic class_factory method
#
def class_factory():
local_class_list = get_classes()
local_cpp_class_list = get_cpp_classes()
if (len(local_class_list) + len(local_cpp_class_list)) == 0:
print("Oups, no Tango class defined within this device server !!!")
print("Sorry, but I exit")
import sys
sys.exit()
# Call the delete_class_list function in order to clear the global
# constructed class Python list. This is necessary only in case of
# ServerRestart command
delete_class_list()
# Clear also all remaining references to the old DeviceClass instances
for class_info in local_class_list:
class_info[1]._device_class_instance = None
local_constructed_class = get_constructed_classes()
for class_info in local_class_list:
device_class_class = class_info[0]
tango_device_class_name = class_info[2]
device_class = device_class_class(tango_device_class_name)
local_constructed_class.append(device_class)
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