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-rw-r--r--bsfs/front/builder.py6
-rw-r--r--bsfs/graph/ac/base.py16
-rw-r--r--bsfs/graph/graph.py35
-rw-r--r--bsfs/graph/nodes.py41
4 files changed, 62 insertions, 36 deletions
diff --git a/bsfs/front/builder.py b/bsfs/front/builder.py
index 73f1703..ecdc768 100644
--- a/bsfs/front/builder.py
+++ b/bsfs/front/builder.py
@@ -8,7 +8,7 @@ Author: Matthias Baumgartner, 2022
import typing
# bsfs imports
-from bsfs.graph import Graph
+from bsfs.graph import Graph, ac
from bsfs.triple_store import TripleStoreBase, SparqlStore
from bsfs.utils import URI, errors
@@ -68,8 +68,10 @@ def build_graph(cfg: typing.Any) -> Graph:
if 'backend' not in args:
raise errors.ConfigError('required argument "backend" is not provided')
backend = build_backend(args['backend'])
+ # build access controls
+ access_controls = ac.NullAC(backend, user)
# build and return graph
cls = _graph_classes[name]
- return cls(backend, user)
+ return cls(backend, access_controls)
## EOF ##
diff --git a/bsfs/graph/ac/base.py b/bsfs/graph/ac/base.py
index 79b09e5..0b9f988 100644
--- a/bsfs/graph/ac/base.py
+++ b/bsfs/graph/ac/base.py
@@ -12,7 +12,7 @@ import typing
from bsfs import schema
from bsfs.query import ast
from bsfs.triple_store import TripleStoreBase
-from bsfs.utils import URI
+from bsfs.utils import URI, typename
# exports
__all__: typing.Sequence[str] = (
@@ -44,6 +44,20 @@ class AccessControlBase(abc.ABC):
self._backend = backend
self._user = URI(user)
+ def __str__(self) -> str:
+ return f'{typename(self)}({self._user})'
+
+ def __repr__(self) -> str:
+ return f'{typename(self)}({self._user})'
+
+ def __eq__(self, other: typing.Any) -> bool:
+ return isinstance(other, type(self)) \
+ and self._backend == other._backend \
+ and self._user == other._user
+
+ def __hash__(self) -> int:
+ return hash((type(self), self._backend, self._user))
+
@abc.abstractmethod
def is_protected_predicate(self, pred: schema.Predicate) -> bool:
"""Return True if a predicate cannot be modified manually."""
diff --git a/bsfs/graph/graph.py b/bsfs/graph/graph.py
index df2e3a5..a74da01 100644
--- a/bsfs/graph/graph.py
+++ b/bsfs/graph/graph.py
@@ -40,31 +40,42 @@ class Graph():
# link to the triple storage backend.
_backend: TripleStoreBase
- # user uri.
- _user: URI
+ # access controls.
+ _ac: ac.AccessControlBase
- def __init__(self, backend: TripleStoreBase, user: URI):
+ # query resolver.
+ _resolver: resolve.Filter
+
+ # query validator.
+ _validate: validate.Filter
+
+ def __init__(
+ self,
+ backend: TripleStoreBase,
+ access_control: ac.AccessControlBase,
+ ):
+ # store members
self._backend = backend
- self._user = user
+ self._ac = access_control
+ # helper classes
self._resolver = resolve.Filter(self._backend.schema)
self._validate = validate.Filter(self._backend.schema)
- self._ac = ac.NullAC(self._backend, self._user)
# ensure Graph schema requirements
self.migrate(self._backend.schema)
def __hash__(self) -> int:
- return hash((type(self), self._backend, self._user))
+ return hash((type(self), self._backend, self._ac))
def __eq__(self, other) -> bool:
return isinstance(other, type(self)) \
and self._backend == other._backend \
- and self._user == other._user
+ and self._ac == other._ac
def __repr__(self) -> str:
- return f'{typename(self)}(backend={repr(self._backend)}, user={self._user})'
+ return f'{typename(self)}({repr(self._backend)}, {self._ac})'
def __str__(self) -> str:
- return f'{typename(self)}({str(self._backend)}, {self._user})'
+ return f'{typename(self)}({str(self._backend)})'
@property
def schema(self) -> bsc.Schema:
@@ -106,7 +117,7 @@ class Graph():
"""
type_ = self.schema.node(node_type)
# NOTE: Nodes constructor materializes guids.
- return _nodes.Nodes(self._backend, self._user, type_, guids)
+ return _nodes.Nodes(self._backend, self._ac, type_, guids)
def node(self, node_type: URI, guid: URI) -> _nodes.Nodes:
"""Return node *guid* of type *node_type* as a `bsfs.graph.Nodes` instance.
@@ -131,14 +142,14 @@ class Graph():
# query the backend
guids = self._backend.get(type_, query) # no need to materialize
# return Nodes instance
- return _nodes.Nodes(self._backend, self._user, type_, guids)
+ return _nodes.Nodes(self._backend, self._ac, type_, guids)
def all(self, node_type: URI) -> _nodes.Nodes:
"""Return all instances of type *node_type*."""
# get node type
type_ = self.schema.node(node_type)
guids = self._backend.get(type_, None) # no need to materialize
- return _nodes.Nodes(self._backend, self._user, type_, guids)
+ return _nodes.Nodes(self._backend, self._ac, type_, guids)
## EOF ##
diff --git a/bsfs/graph/nodes.py b/bsfs/graph/nodes.py
index bc71a32..91cbb5d 100644
--- a/bsfs/graph/nodes.py
+++ b/bsfs/graph/nodes.py
@@ -37,8 +37,8 @@ class Nodes():
# triple store backend.
_backend: TripleStoreBase
- # user uri.
- _user: URI
+ # access controls.
+ _ac: ac.AccessControlBase
# node type.
_node_type: bsc.Node
@@ -49,31 +49,30 @@ class Nodes():
def __init__(
self,
backend: TripleStoreBase,
- user: URI,
+ access_control: ac.AccessControlBase,
node_type: bsc.Node,
guids: typing.Iterable[URI],
):
# set main members
self._backend = backend
- self._user = user
+ self._ac = access_control
self._node_type = node_type
self._guids = set(guids)
# create helper instances
# FIXME: Assumes that the schema does not change while the instance is in use!
- self._ac = ac.NullAC(self._backend, self._user)
def __eq__(self, other: typing.Any) -> bool:
return isinstance(other, Nodes) \
and self._backend == other._backend \
- and self._user == other._user \
+ and self._ac == other._ac \
and self._node_type == other._node_type \
and self._guids == other._guids
def __hash__(self) -> int:
- return hash((type(self), self._backend, self._user, self._node_type, tuple(sorted(self._guids))))
+ return hash((type(self), self._backend, self._ac, self._node_type, tuple(sorted(self._guids))))
def __repr__(self) -> str:
- return f'{typename(self)}({self._backend}, {self._user}, {self._node_type}, {self._guids})'
+ return f'{typename(self)}({self._backend}, {self._ac}, {self._node_type}, {self._guids})'
def __str__(self) -> str:
return f'{typename(self)}({self._node_type}, {self._guids})'
@@ -94,44 +93,44 @@ class Nodes():
return self._backend.schema
def __add__(self, other: typing.Any) -> 'Nodes':
- """Concatenate guids. Backend, user, and node type must match."""
+ """Concatenate guids. Backend, AC, and node type must match."""
if not isinstance(other, type(self)):
return NotImplemented
if self._backend != other._backend:
raise ValueError(other)
- if self._user != other._user:
+ if self._ac != other._ac:
raise ValueError(other)
if self.node_type != other.node_type:
raise ValueError(other)
- return Nodes(self._backend, self._user, self.node_type, self._guids | other._guids)
+ return Nodes(self._backend, self._ac, self.node_type, self._guids | other._guids)
def __or__(self, other: typing.Any) -> 'Nodes':
- """Concatenate guids. Backend, user, and node type must match."""
+ """Concatenate guids. Backend, AC, and node type must match."""
return self.__add__(other)
def __sub__(self, other: typing.Any) -> 'Nodes':
- """Subtract guids. Backend, user, and node type must match."""
+ """Subtract guids. Backend, AC, and node type must match."""
if not isinstance(other, type(self)):
return NotImplemented
if self._backend != other._backend:
raise ValueError(other)
- if self._user != other._user:
+ if self._ac != other._ac:
raise ValueError(other)
if self.node_type != other.node_type:
raise ValueError(other)
- return Nodes(self._backend, self._user, self.node_type, self._guids - other._guids)
+ return Nodes(self._backend, self._ac, self.node_type, self._guids - other._guids)
def __and__(self, other: typing.Any) -> 'Nodes':
- """Intersect guids. Backend, user, and node type must match."""
+ """Intersect guids. Backend, AC, and node type must match."""
if not isinstance(other, type(self)):
return NotImplemented
if self._backend != other._backend:
raise ValueError(other)
- if self._user != other._user:
+ if self._ac != other._ac:
raise ValueError(other)
if self.node_type != other.node_type:
raise ValueError(other)
- return Nodes(self._backend, self._user, self.node_type, self._guids & other._guids)
+ return Nodes(self._backend, self._ac, self.node_type, self._guids & other._guids)
def __len__(self) -> int:
"""Return the number of guids."""
@@ -140,7 +139,7 @@ class Nodes():
def __iter__(self) -> typing.Iterator['Nodes']:
"""Iterate over individual guids. Returns `Nodes` instances."""
return iter(
- Nodes(self._backend, self._user, self.node_type, {guid})
+ Nodes(self._backend, self._ac, self.node_type, {guid})
for guid in self._guids
)
@@ -266,12 +265,12 @@ class Nodes():
# process triples
for root, name, raw in triples:
# get node
- node = Nodes(self._backend, self._user, self.node_type, {root})
+ node = Nodes(self._backend, self._ac, self.node_type, {root})
# get path
path, tail = name2path[name]
# covert raw to value
if isinstance(tail.range, bsc.Node):
- value = Nodes(self._backend, self._user, tail.range, {raw})
+ value = Nodes(self._backend, self._ac, tail.range, {raw})
else:
value = raw
# emit triple
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-03 09:31:28 +0000