GaudiKernel.PropertyProxy Namespace Reference

Classes
class	DataObjectHandleBasePropertyProxy
class	GaudiHandleArrayPropertyProxy
class	GaudiHandlePropertyProxy
class	GaudiHandlePropertyProxyBase
class	PropertyProxy

Functions
def	derives_from (derived, base)
def	_isCompatible (tp, value)
def	PropertyProxyFactory (descr, doc, default)

Variables
list	__all__
	log = logging.getLogger('PropertyProxy')

Function Documentation

def GaudiKernel.PropertyProxy._isCompatible (   tp,   value  )

private

Definition at line 37 of file PropertyProxy.py.

def _isCompatible(tp, value):
    errmsg = "received an instance of %s, but %s expected" % (type(value), tp)

    if derives_from(value, 'PropertyReference'):
        # TODO: implement type checking for references
        return value  # references are valid
    if (tp is str):
        if (type(value) is str) or derives_from(value, 'Configurable'):
            # we can set string properties only from strings or configurables
            return value
        elif isinstance(value, DataObjectHandleBase):
            # Implicitly convert DataObjectHandleBase to str for backward
            # compatiblity in cases like B.Input (str) = A.Output (handle)
            return str(value)
        else:
            raise ValueError(errmsg)
    elif (tp in [list, tuple, dict]):
        if (type(value) is tp):
            # We need to check that the types match for lists, tuples and
            # dictionaries (bug #34769).
            return value
        else:
            raise ValueError(errmsg)
    elif derives_from(tp, 'Configurable'):
        return value
    else:
        # all other types: accept if conversion allowed
        try:
            dummy = tp(value)
        except (TypeError, ValueError):
            raise ValueError(errmsg)

    return dummy         # in case of e.g. classes with __int__, __iter__, etc. implemented

def GaudiKernel.PropertyProxy.derives_from	(		derived,
			base
	)

A string version of isinstance().
<derived> is either an object instance, or a type
<base>    is a string containing the name of the base class (or <derived> class)

Definition at line 22 of file PropertyProxy.py.

def derives_from(derived, base):
    """A string version of isinstance().
    <derived> is either an object instance, or a type
    <base>    is a string containing the name of the base class (or <derived> class)"""
    if not isinstance(derived, type):
        derived = type(derived)
    if derived.__name__ == base:
        return True
    for b in derived.__bases__:
        if derives_from(b, base):
            return True

    return False

def GaudiKernel.PropertyProxy.PropertyProxyFactory	(		descr,
			doc,
			default
	)

Definition at line 405 of file PropertyProxy.py.

def PropertyProxyFactory(descr, doc, default):
    #   print "PropertyProxyFactory( %s, %r )" % (descr.__name__,default)

    if isinstance(default, GaudiHandleArray):
        return GaudiHandleArrayPropertyProxy(descr, doc, default)

    if isinstance(default, GaudiHandle):
        return GaudiHandlePropertyProxy(descr, doc, default)

    if isinstance(default, DataObjectHandleBase):
        return DataObjectHandleBasePropertyProxy(descr, doc, default)

    return PropertyProxy(descr, doc, default)

Variable Documentation

list GaudiKernel.PropertyProxy.__all__

private

Initial value:

= ['PropertyProxy', 'GaudiHandlePropertyProxy',
           'GaudiHandleArrayPropertyProxy']

Definition at line 6 of file PropertyProxy.py.

GaudiKernel.PropertyProxy.log = logging.getLogger('PropertyProxy')

Definition at line 16 of file PropertyProxy.py.