1 files changed, 30 insertions, 0 deletions

diff --git a/subprojects/store-query/src/main/java/tools/refinery/store/query/term/NodeSort.java b/subprojects/store-query/src/main/java/tools/refinery/store/query/term/NodeSort.java
new file mode 100644
index 00000000..1a4b2d4b
--- /dev/null
+++ b/subprojects/store-query/src/main/java/tools/refinery/store/query/term/NodeSort.java
@@ -0,0 +1,30 @@
+package tools.refinery.store.query.term;
+
+import org.jetbrains.annotations.Nullable;
+
+public final class NodeSort implements Sort {
+        public static final NodeSort INSTANCE = new NodeSort();
+
+        private NodeSort() {
+        }
+
+        @Override
+        public boolean isInstance(Variable variable) {
+                return variable instanceof NodeVariable;
+        }
+
+        @Override
+        public NodeVariable newInstance(@Nullable String name) {
+                return new NodeVariable(name);
+        }
+
+        @Override
+        public NodeVariable newInstance() {
+                return newInstance(null);
+        }
+
+        @Override
+        public String toString() {
+                return "<node>";
+        }
+}