def __init__(self,name,value,owner , copy = True):
super(MMAttribute,self).__init__(self,name,value,owner,copy)
self.name=str(name)
self.valueobj=CreateAttributeValue(value , copy)
self.owner=owner
self.oldvalue = None
self.logger = logging.getLogger("MysteryMachine.schema.MMAttribute")
def set_value(self,val, copy = True , writeback = True ):
#Quit early in case of No-Op
if val is self.valueobj:
return
try:
self.valueobj.assign(val)
except Exception, e:
if str(e): self.logger.warn(e)
self.valueobj = CreateAttributeValue(val,copy)
class MMAttribute (MMAttributeContainer):
"""
This class represents an attribute of an MMObject in a MMSystem, such attributes
are normally single values, or paragraphs of text, but can also be relationships
with other MMObjects
Again this is base class to be overr
:version:
:author:
"""
""" ATTRIBUTES
raw_val (private)
type (private)
object (private)
isLoaded (private)
"""
def __init__(self,name,value,owner , copy = True):
super(MMAttribute,self).__init__(self,name,value,owner,copy)
self.name=str(name)
self.valueobj=CreateAttributeValue(value , copy)
self.owner=owner
self.oldvalue = None
self.logger = logging.getLogger("MysteryMachine.schema.MMAttribute")
#self.logger.setLevel(logging.DEBUG)
def get_owner(self):
return self.owner
@Reader
def __str__(self):
"""
@return string :
"""
return self.get_raw_rst()
def __repr__(self):
"""
@return string :
@author
"""
return repr(self.owner)+":"+self.name
@Reader
def GetFullExpansion(self):
"""
This function returns a Fully expanded string represenation of the Attribute.
@return string :
"""
return self.get_parser().GetString(self.get_raw_rst(),repr(self))
def _compose(self):
"""
Do the second initialisation phase for the associated value object.
Value object support a two phase initialisation, for those values
which have a referential integrity requirement which is dependent
on their location within the schema.
_compose is called on the value object with the attribute object as
an argument - in the same manner that exports are called.
Calls _compose(self) on the value object.
"""
if hasattr(self.valueobj,"_compose"):
self.valueobj._compose(self)
#Special case to override the definiton in Base.
def _validate(self):
"""
@return bool :
@author
"""
self.valueobj._validate(self)
@Reader
def get_value(self):
return self.valueobj
@Reader
def get_type(self,):
"""return the type of value stored in the attribute"""
if valueobj: return valueobj.get_type()
else: return None
@Writer
def set_value(self,val, copy = True , writeback = True ):
#Quit early in case of No-Op
if val is self.valueobj:
return
try:
self.valueobj.assign(val)
except Exception, e:
if str(e): self.logger.warn(e)
self.valueobj = CreateAttributeValue(val,copy)
self._invalidate_cache()
self._compose()
