1 files changed, 32 insertions, 0 deletions

diff --git a/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/translator/opposite/OppositeRefiner.java b/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/translator/opposite/OppositeRefiner.java
new file mode 100644
index 00000000..d09684df
--- /dev/null
+++ b/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/translator/opposite/OppositeRefiner.java
@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.store.reasoning.translator.opposite;
+
+import tools.refinery.store.reasoning.ReasoningAdapter;
+import tools.refinery.store.reasoning.refinement.AbstractPartialInterpretationRefiner;
+import tools.refinery.store.reasoning.refinement.PartialInterpretationRefiner;
+import tools.refinery.store.reasoning.representation.PartialSymbol;
+import tools.refinery.store.tuple.Tuple;
+
+public class OppositeRefiner<A, C> extends AbstractPartialInterpretationRefiner<A, C> {
+        private final PartialInterpretationRefiner<A, C> opposite;
+
+        protected OppositeRefiner(ReasoningAdapter adapter, PartialSymbol<A, C> partialSymbol,
+                                                          PartialSymbol<A, C> oppositeSymbol) {
+                super(adapter, partialSymbol);
+                opposite = adapter.getRefiner(oppositeSymbol);
+        }
+
+        @Override
+        public boolean merge(Tuple key, A value) {
+                var oppositeKey = OppositeUtils.flip(key);
+                return opposite.merge(oppositeKey, value);
+        }
+
+        public static <A1, C1> Factory<A1, C1> of(PartialSymbol<A1, C1> oppositeSymbol) {
+                return (adapter, partialSymbol) -> new OppositeRefiner<>(adapter, partialSymbol, oppositeSymbol);
+        }
+}