Package Products :: Package ZenRelations :: Module ZenPropertyManager :: Class PropertyDescriptor

Class PropertyDescriptor

object --+
         |
        PropertyDescriptor

Transforms the property value based on its type.

Follows the Descriptor protocol defined at http://docs.python.org/reference/datamodel.html#descriptors

Instance Methods

[hide private]

__init__(self, id, type, transformer)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature

source code

__get__(self, instance, owner)
Returns self for class attribute access.

source code

__set__(self, instance, value)
Transforms the value and sets it.

source code

__delete__(self, instance)
Delete the property.

source code

_migrate(self, instance)
If the id is in __dict__ then move the value to the _propertyValues dictionary.

source code

_set(self, instance, value)
Transform and set the value in the _propertyValues dictionary.

source code

_transform(self, instance, value, method)
Lookup the transformer for the type and transform the value.

source code

Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __str__

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, id, type, transformer)
(Constructor)

source code

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Overrides: object.__init__: (inherited documentation)

get(self, instance, owner)

source code

Returns self for class attribute access. Returns the transformed value for instance attribute access.

_migrate(self, instance)

source code

If the id is in __dict__ then move the value to the _propertyValues dictionary. Check to make sure that the type of this descriptor class and the type in the Zope OFS PropertyManager metadata are the same.

_transform(self, instance, value, method)

source code

Lookup the transformer for the type and transform the value. The method parameter can be 'transformForGet' or 'transformForSet' and determines the transformer method that is called.

Class PropertyDescriptor

__init__(self, id, type, transformer) (Constructor)

__get__(self, instance, owner)

_migrate(self, instance)

_transform(self, instance, value, method)

init(self, id, type, transformer)
(Constructor)

get(self, instance, owner)