Merge branch 'mb/filter' into develop

1 files changed, 11 insertions, 0 deletions

diff --git a/bsfs/triple_store/base.py b/bsfs/triple_store/base.py
index 6561262..7e03714 100644
--- a/bsfs/triple_store/base.py
+++ b/bsfs/triple_store/base.py
@@ -9,6 +9,7 @@ import abc
 import typing
 
 # inner-module imports
+from bsfs.query import ast
 from bsfs.utils import URI, typename
 import bsfs.schema  as _schema
 
@@ -109,6 +110,16 @@ class TripleStoreBase(abc.ABC):
         """
 
     @abc.abstractmethod
+    def get(
+            self,
+            node_type: _schema.Node,
+            query: typing.Optional[ast.filter.FilterExpression] = None,
+            ) -> typing.Iterator[URI]:
+        """Return guids of nodes of type *node_type* that match the *query*.
+        Return all guids of the respective type if *query* is None.
+        """
+
+    @abc.abstractmethod
     def exists(
             self,
             node_type: _schema.Node,