def evaluate(self, state, local_scope):
"""
Evaluate this statement.
"""
var = state.get_ref("variable").value
for loop_var in var:
# generate a subscope/namespace for each loop
object_id = Scope.object_to_name(loop_var)
namespace = Namespace(object_id, state.namespace)
sub_scope = Scope.get_or_create_scope(state.graph,
namespace.to_path())
# add the loop variable to the scope
if not isinstance(loop_var, Variable):
loop_var = Variable(loop_var)
sub_scope.add_variable(self.loop_var, loop_var)
# generate the import statement
import_stmt = Import(self.module_name)
import_stmt.namespace = namespace
import_stmt.child_namespace = False
child_state = DynamicState(state.compiler, namespace, import_stmt)
child_state.add_to_graph(state.graph)
state._child_statements[import_stmt] = child_state
def load(self):
"""
Compile the configuration model
"""
root_ns = Namespace("__root__")
main_ns = Namespace("__config__")
main_ns.parent = root_ns
# add namespaces to the graph
self.graph.add_namespace(root_ns)
self._units.append(root_ns)
self.graph.add_namespace(main_ns, root_ns)
self._units.append(main_ns)
self._add_other_ns(root_ns)
# load main file
cf_file = FileCompileUnit(self, self.__cf_file, main_ns)
main_ns.unit = cf_file
# load libraries
for library in self.__lib_dirs:
# TODO: take into account the precedence
self.load_libdir(library, root_ns)
self.__root_ns = root_ns
return root_ns
def load_libdir(self, cf_dir, root_ns):
"""
Load all libraries located in a directory.
@param cf_dir: The directory to get all files from
@param root_ns: The root namespace to add the libraries too
"""
for cf_file in glob.glob(os.path.join(cf_dir, '*')):
if os.path.isdir(cf_file) and self._is_cf_module(cf_file):
name = os.path.basename(cf_file)
namespace = Namespace(name)
namespace.parent = root_ns
self.graph.add_namespace(namespace, root_ns)
self._units.append(namespace)
self._load_dir(cf_file, namespace)
# check for plugins
plugin_path = os.path.join(cf_file, "plugins")
if os.path.isdir(os.path.join(cf_file, "plugins")):
self._load_plugins(plugin_path, namespace)
# register the module
self.loaded_modules[name] = cf_file
def _load_dir(self, cf_dir, namespace):
"""
Create a list of compile units for the given directory
@param cf_dir: The directory to get all files from
@param namespace: The namespace the files need to be added to
"""
for cf_file in glob.glob(os.path.join(cf_dir, "model", '*')):
file_name = os.path.basename(cf_file)
if os.path.isdir(cf_file) and self._is_cf_module(cf_file):
# create a new namespace
new_ns = Namespace(file_name)
new_ns.parent = namespace
self.graph.add_namespace(new_ns, namespace)
self._units.append(new_ns)
self._load_dir(cf_file, new_ns)
elif file_name[-3:] == ".cf":
if file_name == self.__init_cf:
namespace.unit = FileCompileUnit(self, cf_file, namespace)
else:
new_ns = Namespace(file_name[:-3])
new_ns.parent = namespace
self.graph.add_namespace(new_ns, namespace)
self._units.append(new_ns)
new_ns.unit = FileCompileUnit(self, cf_file, new_ns)
def _add_other_ns(self, root_ns):
"""
Add the namespace of builtin types and plugins.
"""
type_ns = Namespace("__types__")
plugin_ns = Namespace("__plugins__")
type_ns.parent = root_ns
plugin_ns.parent = root_ns
type_ns.unit = BuiltinCompileUnit(self, type_ns)
plugin_ns.unit = PluginCompileUnit(self, plugin_ns)
self.graph.add_namespace(type_ns, root_ns)
self._units.append(type_ns)
self.graph.add_namespace(plugin_ns, root_ns)
self._units.append(plugin_ns)
def new_statements(self, state):
"""
Add any arguments that need to be validated to the graph
"""
attributes = set()
# Set the value from the constructor
object_ref = state.get_result_reference()
for name, value in self.__attributes.items():
# set the attributes passed with the constructor
stmt = SetAttribute(object_ref, name, value)
self.copy_location(stmt)
stmt.namespace = self.namespace
state.add_statement(stmt)
attributes.add(name)
# Set values defined in default constructors
type_class = state.get_type("classtype")
if isinstance(type_class, Default):
default = type_class
type_class = type_class.get_entity()
# set default values
for attribute_name in type_class.get_all_attribute_names():
attribute = type_class.get_attribute(attribute_name)
if attribute.name not in attributes:
try:
value = default.get_default(attribute.name)
stmt = SetAttribute(object_ref, attribute.name, value)
self.copy_location(stmt)
stmt.namespace = self.namespace
state.add_statement(stmt)
attributes.add(attribute.name)
except AttributeError:
pass
# Set default values if they have not been set yet
for name, value in type_class.get_default_values().items():
if name not in attributes and value is not None:
stmt = SetAttribute(object_ref, name, value)
self.copy_location(stmt)
stmt.namespace = self.namespace
state.add_statement(stmt)
# Make values of attributes available in subscopes by defining
# variables with matching names in the subscope
object_id = Scope.object_to_name(state)
namespace = Namespace(object_id, state.namespace)
scope = Scope.get_or_create_scope(state.graph, namespace.to_path())
added_variables = set()
for attribute in type_class.get_all_attribute_names():
if attribute in added_variables:
continue
var = AttributeVariable.create(object_ref, attribute)
self.copy_location(var)
added_variables.add(attribute)
scope.add_variable(attribute, var)
# Set a attributes with low multiplicity == 0 -> set []
attribute_obj = type_class.get_attribute(attribute)
if hasattr(attribute_obj, "low") and attribute_obj.low == 0:
value = Variable(QList())
stmt = SetAttribute(object_ref, attribute_obj.name, value)
self.copy_location(stmt)
stmt.namespace = self.namespace
state.add_statement(stmt)
# set the self variable
scope.add_variable("self", object_ref)
# now check that all variables that have indexes on them, are already
# defined and add the instance to the index
for index in type_class._index_def:
for attr in index:
if attr not in attributes:
raise Exception("%s is part of an index and should be set in the constructor." % attr)
