Package ndg :: Package xacml :: Package core :: Module expression :: Class Expression

Class Expression

   object --+    
            |    
XacmlCoreBase --+
                |
               Expression

Known Subclasses:

XACML Expression type

Nested Classes

[hide private]

__metaclass__
Metaclass for defining Abstract Base Classes (ABCs).

Instance Methods

[hide private]

__init__(self)
Element local name check makes this a virtual method

source code

_get_dataType(self)

source code

_set_dataType(self, value)

source code

AttributeValue/NoneType

evaluate(self, context)
Evaluate the result of the expression in a condition.

source code

dict

__getstate__(self)
Enable pickling

source code

Inherited from XacmlCoreBase (private): _getXmlns, _setXmlns

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

Class Variables

[hide private]

NoneType but implement as string in derived classes ELEMENT_LOCAL_NAME = None
XML element local name for the given type

string DATA_TYPE_ATTRIB_NAME = 'DataType'
XML attribute name for data type

__abstractmethods__ = frozenset(['evaluate'])

_abc_cache = <_weakrefset.WeakSet object at 0x1011b9750>

_abc_negative_cache = <_weakrefset.WeakSet object at 0x1011b97d0>

_abc_negative_cache_version = 10

_abc_registry = <_weakrefset.WeakSet object at 0x1011b9690>

Inherited from XacmlCoreBase: XACML_1_0_NS_PREFIX, XACML_2_0_NS_PREFIX, XMLNS

Instance Variables

[hide private]

None / basestring

__dataType
data type for this expression

Properties

[hide private]

dataType
expression value data type

Inherited from XacmlCoreBase: elem, isValidXmlns, xmlns

Inherited from object: __class__

Method Details

[hide private]

init(self)
(Constructor)

source code

Element local name check makes this a virtual method

Raises:

NotImplementedError - derived classes must set ELEMENT_LOCAL_NAME to a string

Overrides: object.__init__

(inherited documentation)

evaluate(self, context)

source code

Evaluate the result of the expression in a condition. Derived classes must implement

Parameters:

context (ndg.xacml.core.context.request.Request) - the request context

Returns: AttributeValue/NoneType

attribute value(s) resulting from execution of this expression in a condition

Decorators:

@abstractmethod

getstate(self)

source code

Enable pickling

Returns: dict: object's attribute dictionary
Overrides: XacmlCoreBase.__getstate__

Property Details

[hide private]

dataType

expression value data type

Get Method:: _get_dataType(self)
Set Method:: _set_dataType(self, value)

Class Expression

__init__(self) (Constructor)

evaluate(self, context)

__getstate__(self)

dataType

init(self)
(Constructor)

getstate(self)