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# Copyright (c) 2004-2013 LOGILAB S.A. (Paris, FRANCE).
# http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""diagram objects
"""
import astroid
from pylint.pyreverse.utils import is_interface, FilterMixIn
from pylint.checkers.utils import decorated_with_property
class Figure(object):
"""base class for counter handling"""
class Relationship(Figure):
"""a relation ship from an object in the diagram to another
"""
def __init__(self, from_object, to_object, relation_type, name=None):
Figure.__init__(self)
self.from_object = from_object
self.to_object = to_object
self.type = relation_type
self.name = name
class DiagramEntity(Figure):
"""a diagram object, i.e. a label associated to an astroid node
"""
def __init__(self, title='No name', node=None):
Figure.__init__(self)
self.title = title
self.node = node
class ClassDiagram(Figure, FilterMixIn):
"""main class diagram handling
"""
TYPE = 'class'
def __init__(self, title, mode):
FilterMixIn.__init__(self, mode)
Figure.__init__(self)
self.title = title
self.objects = []
self.relationships = {}
self._nodes = {}
self.depends = []
def get_relationships(self, role):
# sorted to get predictable (hence testable) results
return sorted(self.relationships.get(role, ()),
key=lambda x: (x.from_object.fig_id, x.to_object.fig_id))
def add_relationship(self, from_object, to_object,
relation_type, name=None):
"""create a relation ship
"""
rel = Relationship(from_object, to_object, relation_type, name)
self.relationships.setdefault(relation_type, []).append(rel)
def get_relationship(self, from_object, relation_type):
"""return a relation ship or None
"""
for rel in self.relationships.get(relation_type, ()):
if rel.from_object is from_object:
return rel
raise KeyError(relation_type)
def get_attrs(self, node):
"""return visible attributes, possibly with class name"""
attrs = []
properties = [
(n, m) for n, m in node.items()
if isinstance(m, astroid.FunctionDef)
and decorated_with_property(m)
]
for node_name, ass_nodes in list(node.instance_attrs_type.items()) + \
list(node.locals_type.items()) + properties:
if not self.show_attr(node_name):
continue
names = self.class_names(ass_nodes)
if names:
node_name = "%s : %s" % (node_name, ", ".join(names))
attrs.append(node_name)
return sorted(attrs)
def get_methods(self, node):
"""return visible methods"""
methods = [
m for m in node.values()
if isinstance(m, astroid.FunctionDef)
and not decorated_with_property(m)
and self.show_attr(m.name)
]
return sorted(methods, key=lambda n: n.name)
def add_object(self, title, node):
"""create a diagram object
"""
assert node not in self._nodes
ent = DiagramEntity(title, node)
self._nodes[node] = ent
self.objects.append(ent)
def class_names(self, nodes):
"""return class names if needed in diagram"""
names = []
for ass_node in nodes:
if isinstance(ass_node, astroid.Instance):
ass_node = ass_node._proxied
if isinstance(ass_node, astroid.ClassDef) \
and hasattr(ass_node, "name") and not self.has_node(ass_node):
if ass_node.name not in names:
ass_name = ass_node.name
names.append(ass_name)
return names
def nodes(self):
"""return the list of underlying nodes
"""
return self._nodes.keys()
def has_node(self, node):
"""return true if the given node is included in the diagram
"""
return node in self._nodes
def object_from_node(self, node):
"""return the diagram object mapped to node
"""
return self._nodes[node]
def classes(self):
"""return all class nodes in the diagram"""
return [o for o in self.objects if isinstance(o.node, astroid.ClassDef)]
def classe(self, name):
"""return a class by its name, raise KeyError if not found
"""
for klass in self.classes():
if klass.node.name == name:
return klass
raise KeyError(name)
def extract_relationships(self):
"""extract relation ships between nodes in the diagram
"""
for obj in self.classes():
node = obj.node
obj.attrs = self.get_attrs(node)
obj.methods = self.get_methods(node)
# shape
if is_interface(node):
obj.shape = 'interface'
else:
obj.shape = 'class'
# inheritance link
for par_node in node.ancestors(recurs=False):
try:
par_obj = self.object_from_node(par_node)
self.add_relationship(obj, par_obj, 'specialization')
except KeyError:
continue
# implements link
for impl_node in node.implements:
try:
impl_obj = self.object_from_node(impl_node)
self.add_relationship(obj, impl_obj, 'implements')
except KeyError:
continue
# associations link
for name, values in list(node.instance_attrs_type.items()) + \
list(node.locals_type.items()):
for value in values:
if value is astroid.YES:
continue
if isinstance(value, astroid.Instance):
value = value._proxied
try:
ass_obj = self.object_from_node(value)
self.add_relationship(ass_obj, obj, 'association', name)
except KeyError:
continue
class PackageDiagram(ClassDiagram):
"""package diagram handling
"""
TYPE = 'package'
def modules(self):
"""return all module nodes in the diagram"""
return [o for o in self.objects if isinstance(o.node, astroid.Module)]
def module(self, name):
"""return a module by its name, raise KeyError if not found
"""
for mod in self.modules():
if mod.node.name == name:
return mod
raise KeyError(name)
def get_module(self, name, node):
"""return a module by its name, looking also for relative imports;
raise KeyError if not found
"""
for mod in self.modules():
mod_name = mod.node.name
if mod_name == name:
return mod
#search for fullname of relative import modules
package = node.root().name
if mod_name == "%s.%s" % (package, name):
return mod
if mod_name == "%s.%s" % (package.rsplit('.', 1)[0], name):
return mod
raise KeyError(name)
def add_from_depend(self, node, from_module):
"""add dependencies created by from-imports
"""
mod_name = node.root().name
obj = self.module(mod_name)
if from_module not in obj.node.depends:
obj.node.depends.append(from_module)
def extract_relationships(self):
"""extract relation ships between nodes in the diagram
"""
ClassDiagram.extract_relationships(self)
for obj in self.classes():
# ownership
try:
mod = self.object_from_node(obj.node.root())
self.add_relationship(obj, mod, 'ownership')
except KeyError:
continue
for obj in self.modules():
obj.shape = 'package'
# dependencies
for dep_name in obj.node.depends:
try:
dep = self.get_module(dep_name, obj.node)
except KeyError:
continue
self.add_relationship(obj, dep, 'depends')
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