Fix: allow to_node_storage & try_get_in_node_storage on null nodes (#305)

Author: liss-h

src/rdf4cpp/BlankNode.cpp

@@ -29,7 +29,7 @@ BlankNode BlankNode::make_unchecked(std::string_view identifier, storage::DynNod
 }
 
 BlankNode BlankNode::to_node_storage(storage::DynNodeStoragePtr node_storage) const {
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 
@@ -38,7 +38,7 @@ BlankNode BlankNode::to_node_storage(storage::DynNodeStoragePtr node_storage) co
 }
 
 BlankNode BlankNode::try_get_in_node_storage(storage::DynNodeStoragePtr node_storage) const noexcept {
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 

src/rdf4cpp/IRI.cpp

@@ -61,7 +61,7 @@ void IRI::validate(std::string_view s) {
 }
 
 IRI IRI::to_node_storage(storage::DynNodeStoragePtr node_storage) const {
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 
@@ -70,7 +70,7 @@ IRI IRI::to_node_storage(storage::DynNodeStoragePtr node_storage) const {
 }
 
 IRI IRI::try_get_in_node_storage(storage::DynNodeStoragePtr node_storage) const noexcept {
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 

src/rdf4cpp/Literal.cpp

@@ -241,7 +241,7 @@ Literal Literal::to_node_storage(storage::DynNodeStoragePtr node_storage) const
     using datatypes::registry::DatatypeRegistry;
 
     node_storage = select_node_storage(node_storage);
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 
@@ -314,7 +314,7 @@ Literal Literal::try_get_in_node_storage(storage::DynNodeStoragePtr node_storage
     using datatypes::registry::DatatypeRegistry;
 
     node_storage = select_node_storage(node_storage);
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 

src/rdf4cpp/query/Variable.cpp

@@ -28,7 +28,7 @@ Variable Variable::make_unchecked(std::string_view name, bool anonymous, storage
 }
 
 Variable Variable::to_node_storage(storage::DynNodeStoragePtr node_storage) const {
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }
 
@@ -37,7 +37,7 @@ Variable Variable::to_node_storage(storage::DynNodeStoragePtr node_storage) cons
 }
 
 Variable Variable::try_get_in_node_storage(storage::DynNodeStoragePtr node_storage) const noexcept {
-    if (handle_.storage() == node_storage) {
+    if (handle_.storage() == node_storage || null()) {
         return *this;
     }