def _predicate_orm_attr(self, iri):
try:
table_iri_str, _, colspec = iri.partition('#')
except AttributeError:
raise TypeError(u'invalid predicate IRI {!r}: not a string'
.format(iri))
if not table_iri_str or not colspec:
raise ValueError(u'invalid predicate IRI {!r}:'
u' does not match either format {!r}'
.format(iri,
('table#colname',
'table#ref-colname[;colname]...')))
table_iri = _rdf.URIRef(table_iri_str)
if colspec.startswith('ref-'):
cols = frozenset(_pct_decoded(colname)
for colname in colspec[4:].split(';'))
try:
prop = self._orm_relationships[table_iri][cols]
except KeyError:
raise ValueError('unknown reference property {!r}'.format(iri))
else:
col = _pct_decoded(colspec)
try:
prop = self._orm_columns_properties[table_iri][col]
except KeyError:
raise ValueError('unknown literal property {!r}'.format(iri))
return prop.class_attribute
def _predicate_orm_attr(self, iri):
try:
table_iri_str, _, colspec = iri.partition('#')
except AttributeError:
raise TypeError(
u'invalid predicate IRI {!r}: not a string'.format(iri))
if not table_iri_str or not colspec:
raise ValueError(
u'invalid predicate IRI {!r}:'
u' does not match either format {!r}'.format(
iri, ('table#colname', 'table#ref-colname[;colname]...')))
table_iri = _rdf.URIRef(table_iri_str)
if colspec.startswith('ref-'):
cols = frozenset(
_pct_decoded(colname) for colname in colspec[4:].split(';'))
try:
prop = self._orm_relationships[table_iri][cols]
except KeyError:
raise ValueError('unknown reference property {!r}'.format(iri))
else:
col = _pct_decoded(colspec)
try:
prop = self._orm_columns_properties[table_iri][col]
except KeyError:
raise ValueError('unknown literal property {!r}'.format(iri))
return prop.class_attribute
def _parse_row_node(self, node):
try:
table_iri_str, _, pkeyspec = node.rpartition('/')
except AttributeError:
raise TypeError(u'invalid row node {!r}: not a string'
.format(node))
if not table_iri_str or '=' not in pkeyspec:
raise ValueError\
(u'invalid row node {!r}: does not match format {!r}'
.format(node, 'table/colname=value[;colname=value]...'))
table_iri = _rdf.URIRef(table_iri_str)
if table_iri in self._orm_bnode_tables:
if not isinstance(node, _rdf.BNode):
raise ValueError('invalid node type {!r} for blank node table'
' {!r}: not blank node'
.format(node.__class__, table_iri))
else:
if not isinstance(node, _rdf.URIRef):
raise ValueError('invalid node type {!r} for IRI node table'
' {!r}: not IRI node'
.format(node.__class__, table_iri))
pkey = {}
cols_props = self._orm_columns_properties[table_iri]
cols_datatypes = self._orm_columns_rdf_datatypes[table_iri]
for name_irisafe, value_irisafe in (item.split('=')
for item in pkeyspec.split(';')):
colname = _pct_decoded(name_irisafe)
value_rdf = _rdf.Literal(_pct_decoded(value_irisafe),
datatype=cols_datatypes[colname])
pkey[cols_props[colname].class_attribute] = \
_common.sql_literal_from_rdf(value_rdf)
return table_iri, pkey
def _parse_row_node(self, node):
try:
table_iri_str, _, pkeyspec = node.rpartition('/')
except AttributeError:
raise TypeError(
u'invalid row node {!r}: not a string'.format(node))
if not table_iri_str or '=' not in pkeyspec:
raise ValueError\
(u'invalid row node {!r}: does not match format {!r}'
.format(node, 'table/colname=value[;colname=value]...'))
table_iri = _rdf.URIRef(table_iri_str)
if table_iri in self._orm_bnode_tables:
if not isinstance(node, _rdf.BNode):
raise ValueError('invalid node type {!r} for blank node table'
' {!r}: not blank node'.format(
node.__class__, table_iri))
else:
if not isinstance(node, _rdf.URIRef):
raise ValueError('invalid node type {!r} for IRI node table'
' {!r}: not IRI node'.format(
node.__class__, table_iri))
pkey = {}
cols_props = self._orm_columns_properties[table_iri]
cols_datatypes = self._orm_columns_rdf_datatypes[table_iri]
for name_irisafe, value_irisafe in (item.split('=')
for item in pkeyspec.split(';')):
colname = _pct_decoded(name_irisafe)
value_rdf = _rdf.Literal(_pct_decoded(value_irisafe),
datatype=cols_datatypes[colname])
pkey[cols_props[colname].class_attribute] = \
_common.sql_literal_from_rdf(value_rdf)
return table_iri, pkey
