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# This program is free software; you can redistribute it and/or modify
# it under the terms of the (LGPL) GNU Lesser General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library Lesser General Public License for more details at
# ( http://www.gnu.org/licenses/lgpl.html ).
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# written by: Jeff Ortel ( jortel@redhat.com )
"""
The I{schema} module provides a intelligent representation of
an XSD schema. The I{raw} model is the XML tree and the I{model}
is the denormalized, objectified and intelligent view of the schema.
Most of the I{value-add} provided by the model is centered around
tranparent referenced type resolution and targeted denormalization.
"""
from logging import getLogger
from suds import *
from suds.sax import Namespace, splitPrefix
log = getLogger(__name__)
def qualify(ref, resolvers, defns=Namespace.default):
"""
Get a reference that is I{qualified} by namespace.
@param ref: A referenced schema type name.
@type ref: str
@param resolvers: A list of objects to be used to resolve types.
@type resolvers: [L{sax.element.Element},]
@param defns: An optional target namespace used to qualify references
when no prefix is specified.
@type defns: A default namespace I{tuple: (prefix,uri)} used when ref not prefixed.
@return: A qualified reference.
@rtype: (name, namespace-uri)
"""
ns = None
p, n = splitPrefix(ref)
if p is not None:
if not isinstance(resolvers, (list, tuple)):
resolvers = (resolvers,)
for r in resolvers:
resolved = r.resolvePrefix(p)
if resolved[1] is not None:
ns = resolved
break
if ns is None:
raise Exception('prefix (%s) not resolved' % p)
else:
ns = defns
return (n, ns[1])
def isqref(object):
"""
Get whether the object is a I{qualified reference}.
@param object: An object to be tested.
@type object: I{any}
@rtype: boolean
@see: L{qualify}
"""
return (\
isinstance(object, tuple) and \
len(object) == 2 and \
isinstance(object[0], basestring) and \
isinstance(object[1], basestring))
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