1 files changed, 17 insertions, 0 deletions

diff --git a/subprojects/store-query/src/main/java/tools/refinery/store/query/equality/LiteralHashCodeHelper.java b/subprojects/store-query/src/main/java/tools/refinery/store/query/equality/LiteralHashCodeHelper.java
new file mode 100644
index 00000000..5495160a
--- /dev/null
+++ b/subprojects/store-query/src/main/java/tools/refinery/store/query/equality/LiteralHashCodeHelper.java
@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.store.query.equality;
+
+import tools.refinery.store.query.term.Variable;
+
+import java.util.Objects;
+
+@FunctionalInterface
+public interface LiteralHashCodeHelper {
+        LiteralHashCodeHelper DEFAULT = Objects::hashCode;
+
+        int getVariableHashCode(Variable variable);
+}