def in_lambda(string):
return putinto(string, "lambda: %s")
def map_types(string):
return putinto(string, "map(type, %s)")
def type_of(string):
return putinto(string, "type(%s)")
def list_of(strings):
return putinto(join(', ', strings), "[%s]")
def constructor_as_string(object, assigned_names={}):
"""For a given object (either a SerializedObject or a list of them) return
a string representing a code that will construct it.
>>> from test.helper import make_fresh_serialize
>>> serialize = make_fresh_serialize()
>>> m = Module(None, 'myclasses')
It handles built-in types
>>> constructor_as_string(serialize(123))
'123'
>>> constructor_as_string(serialize('string'))
"'string'"
>>> constructor_as_string([serialize(1), serialize('two')])
"[1, 'two']"
as well as instances of user-defined classes
>>> obj = UserObject(None, Class('SomeClass', module=m))
>>> constructor_as_string(obj)
'SomeClass()'
interpreting their arguments correctly
>>> obj.add_call(MethodCall(Method('__init__', ['self', 'arg']), {'arg': serialize('whatever')}, serialize(None)))
>>> constructor_as_string(obj)
"SomeClass('whatever')"
even if they're user objects themselves:
>>> otherobj = UserObject(None, Class('SomeOtherClass', module=m))
>>> otherobj.add_call(MethodCall(Method('__init__', ['self', 'object']), {'object': obj}, serialize(None)))
>>> constructor_as_string(otherobj)
"SomeOtherClass(SomeClass('whatever'))"
or they are already named:
>>> s = serialize("string")
>>> anotherobj = UserObject(None, Class('AnotherClass', module=m))
>>> anotherobj.add_call(MethodCall(Method('__init__', ['self', 's']), {'s': s}, serialize(None)))
>>> constructor_as_string(anotherobj, {s: 's'})
'AnotherClass(s)'
Handles composite objects:
>>> constructor_as_string(serialize([1, "a", None]))
"[1, 'a', None]"
even when they contain instances of user-defined classes:
>>> constructor_as_string(SequenceObject([obj], lambda x:x))
"[SomeClass('whatever')]"
or other composite objects:
>>> constructor_as_string(serialize((23, [4, [5]], {'a': 'b'})))
"(23, [4, [5]], {'a': 'b'})"
or already named objects:
>>> seq = serialize(["a", None])
>>> astring = seq.contained_objects[0]
>>> constructor_as_string(seq, {astring: 'astring'})
'[astring, None]'
Empty tuples are recreated properly:
>>> constructor_as_string(serialize((((42,),),)))
'(((42,),),)'
Recreated objects keep their import information:
>>> cs = constructor_as_string(UserObject(None, Class('MyClass', module=m)))
>>> cs
'MyClass()'
>>> cs.imports
set([('myclasses', 'MyClass')])
Library objects like xml.dom.minidom.Element are recreated properly as well:
>>> from xml.dom.minidom import Element
>>> constructor_as_string(serialize(Element("tag", "uri", "prefix")))
"Element('tag', 'uri', 'prefix')"
"""
if isinstance(object, list):
return list_of(map(constructor_as_string, object))
elif assigned_names.has_key(object):
return CodeString(assigned_names[object])
elif isinstance(object, UserObject):
# Look for __init__ call and base the constructor on that.
init_call = object.get_init_call()
if init_call:
cs = call_as_string_for(object.klass.name, init_call.input,
init_call.definition, assigned_names)
else:
cs = call_as_string(object.klass.name, {})
return addimport(cs, import_for(object.klass))
elif isinstance(object, ImmutableObject):
return CodeString(object.reconstructor, imports=object.imports)
elif isinstance(object, (CompositeObject, LibraryObject)):
arguments = join(', ', get_contained_objects_info(object, assigned_names))
return putinto(arguments, object.constructor_format, object.imports)
elif isinstance(object, GeneratorObject):
if object.is_activated():
cs = call_as_string_for(object.definition.name, object.args,
object.definition)
return addimport(cs, import_for(object.definition))
else:
return todo_value('generator')
elif isinstance(object, UnknownObject):
return todo_value(object.partial_reconstructor)
else:
raise TypeError("constructor_as_string expected SerializedObject at input, not %s" % object)
def constructor_as_string(object, assigned_names={}):
"""For a given object (either a SerializedObject or a list of them) return
a string representing a code that will construct it.
>>> from test.helper import make_fresh_serialize
>>> serialize = make_fresh_serialize()
>>> m = Module(None, 'myclasses')
It handles built-in types
>>> constructor_as_string(serialize(123))
'123'
>>> constructor_as_string(serialize('string'))
"'string'"
>>> constructor_as_string([serialize(1), serialize('two')])
"[1, 'two']"
as well as instances of user-defined classes
>>> obj = UserObject(None, Class('SomeClass', module=m))
>>> constructor_as_string(obj)
'SomeClass()'
interpreting their arguments correctly
>>> obj.add_call(MethodCall(Method('__init__', ['self', 'arg']), {'arg': serialize('whatever')}, serialize(None)))
>>> constructor_as_string(obj)
"SomeClass('whatever')"
even if they're user objects themselves:
>>> otherobj = UserObject(None, Class('SomeOtherClass', module=m))
>>> otherobj.add_call(MethodCall(Method('__init__', ['self', 'object']), {'object': obj}, serialize(None)))
>>> constructor_as_string(otherobj)
"SomeOtherClass(SomeClass('whatever'))"
or they are already named:
>>> s = serialize("string")
>>> anotherobj = UserObject(None, Class('AnotherClass', module=m))
>>> anotherobj.add_call(MethodCall(Method('__init__', ['self', 's']), {'s': s}, serialize(None)))
>>> constructor_as_string(anotherobj, {s: 's'})
'AnotherClass(s)'
Handles composite objects:
>>> constructor_as_string(serialize([1, "a", None]))
"[1, 'a', None]"
even when they contain instances of user-defined classes:
>>> constructor_as_string(SequenceObject([obj], lambda x:x))
"[SomeClass('whatever')]"
or other composite objects:
>>> constructor_as_string(serialize((23, [4, [5]], {'a': 'b'})))
"(23, [4, [5]], {'a': 'b'})"
or already named objects:
>>> seq = serialize(["a", None])
>>> astring = seq.contained_objects[0]
>>> constructor_as_string(seq, {astring: 'astring'})
'[astring, None]'
Empty tuples are recreated properly:
>>> constructor_as_string(serialize((((42,),),)))
'(((42,),),)'
Recreated objects keep their import information:
>>> cs = constructor_as_string(UserObject(None, Class('MyClass', module=m)))
>>> cs
'MyClass()'
>>> cs.imports
set([('myclasses', 'MyClass')])
Library objects like xml.dom.minidom.Element are recreated properly as well:
>>> from xml.dom.minidom import Element
>>> constructor_as_string(serialize(Element("tag", "uri", "prefix")))
"Element('tag', 'uri', 'prefix')"
"""
if isinstance(object, list):
return list_of(map(constructor_as_string, object))
elif assigned_names.has_key(object):
return CodeString(assigned_names[object])
elif isinstance(object, UserObject):
# Look for __init__ call and base the constructor on that.
init_call = object.get_init_call()
if init_call:
cs = call_as_string_for(object.klass.name, init_call.input,
init_call.definition, assigned_names)
else:
cs = call_as_string(object.klass.name, {})
return addimport(cs, import_for(object.klass))
elif isinstance(object, ImmutableObject):
return CodeString(object.reconstructor, imports=object.imports)
elif isinstance(object, (CompositeObject, LibraryObject)):
arguments = join(', ',
get_contained_objects_info(object, assigned_names))
return putinto(arguments, object.constructor_format, object.imports)
elif isinstance(object, GeneratorObject):
if object.is_activated():
cs = call_as_string_for(object.definition.name, object.args,
object.definition)
return addimport(cs, import_for(object.definition))
else:
return todo_value('generator')
elif isinstance(object, UnknownObject):
return todo_value(object.partial_reconstructor)
else:
raise TypeError(
"constructor_as_string expected SerializedObject at input, not %s"
% object)
def list_of(strings):
return putinto(join(', ', strings), "[%s]")
def in_lambda(string):
return putinto(string, "lambda: %s")
def type_of(string):
return putinto(string, "type(%s)")
def map_types(string):
return putinto(string, "map(type, %s)")
