1 files changed, 45 insertions, 0 deletions

diff --git a/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/translator/multiobject/MultiObjectStorageRefiner.java b/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/translator/multiobject/MultiObjectStorageRefiner.java
new file mode 100644
index 00000000..e48934d8
--- /dev/null
+++ b/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/translator/multiobject/MultiObjectStorageRefiner.java
@@ -0,0 +1,45 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.store.reasoning.translator.multiobject;
+
+import tools.refinery.store.model.Interpretation;
+import tools.refinery.store.model.Model;
+import tools.refinery.store.reasoning.refinement.StorageRefiner;
+import tools.refinery.store.representation.Symbol;
+import tools.refinery.store.representation.cardinality.CardinalityInterval;
+import tools.refinery.store.representation.cardinality.CardinalityIntervals;
+import tools.refinery.store.tuple.Tuple;
+
+class MultiObjectStorageRefiner implements StorageRefiner {
+        private final Interpretation<CardinalityInterval> countInterpretation;
+
+        public MultiObjectStorageRefiner(Symbol<CardinalityInterval> countSymbol, Model model) {
+                countInterpretation = model.getInterpretation(countSymbol);
+        }
+
+        @Override
+        public boolean split(int parentNode, int childNode) {
+                var parentKey = Tuple.of(parentNode);
+                var parentCount = countInterpretation.get(parentKey);
+                if (parentCount == null) {
+                        return false;
+                }
+                var newParentCount = parentCount.take(1);
+                if (newParentCount.isEmpty()) {
+                        return false;
+                }
+                var childKey = Tuple.of(childNode);
+                countInterpretation.put(parentKey, newParentCount);
+                countInterpretation.put(childKey, CardinalityIntervals.ONE);
+                return true;
+        }
+
+        @Override
+        public boolean cleanup(int nodeToDelete) {
+                var previousCount = countInterpretation.put(Tuple.of(nodeToDelete), null);
+                return previousCount.lowerBound() == 0;
+        }
+}