1 files changed, 44 insertions, 0 deletions

diff --git a/subprojects/store-query-viatra/src/main/java/tools/refinery/store/query/viatra/internal/context/RelationalQueryMetaContext.java b/subprojects/store-query-viatra/src/main/java/tools/refinery/store/query/viatra/internal/context/RelationalQueryMetaContext.java
new file mode 100644
index 00000000..64c23c61
--- /dev/null
+++ b/subprojects/store-query-viatra/src/main/java/tools/refinery/store/query/viatra/internal/context/RelationalQueryMetaContext.java
@@ -0,0 +1,44 @@
+package tools.refinery.store.query.viatra.internal.context;
+
+import org.eclipse.viatra.query.runtime.matchers.context.AbstractQueryMetaContext;
+import org.eclipse.viatra.query.runtime.matchers.context.IInputKey;
+import org.eclipse.viatra.query.runtime.matchers.context.InputKeyImplication;
+import tools.refinery.store.query.view.RelationView;
+
+import java.util.*;
+
+/**
+ * The meta context information for String scopes.
+ */
+public class RelationalQueryMetaContext extends AbstractQueryMetaContext {
+        @Override
+        public boolean isEnumerable(IInputKey key) {
+                ensureValidKey(key);
+                return key.isEnumerable();
+        }
+
+        @Override
+        public boolean isStateless(IInputKey key) {
+                ensureValidKey(key);
+                return true;
+        }
+
+        @Override
+        public Collection<InputKeyImplication> getImplications(IInputKey implyingKey) {
+                ensureValidKey(implyingKey);
+                return Set.of();
+        }
+
+        @Override
+        public Map<Set<Integer>, Set<Integer>> getFunctionalDependencies(IInputKey key) {
+                ensureValidKey(key);
+                return Map.of();
+        }
+
+        public void ensureValidKey(IInputKey key) {
+                if (key instanceof RelationView<?>) {
+                        return;
+                }
+                throw new IllegalArgumentException("The input key %s is not a valid input key.".formatted(key));
+        }
+}