1 files changed, 28 insertions, 0 deletions

diff --git a/subprojects/language-semantics/src/main/java/tools/refinery/language/semantics/model/internal/MutableSeed.java b/subprojects/language-semantics/src/main/java/tools/refinery/language/semantics/model/internal/MutableSeed.java
new file mode 100644
index 00000000..99019e2a
--- /dev/null
+++ b/subprojects/language-semantics/src/main/java/tools/refinery/language/semantics/model/internal/MutableSeed.java
@@ -0,0 +1,28 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.language.semantics.model.internal;
+
+import tools.refinery.store.reasoning.seed.Seed;
+import tools.refinery.store.representation.TruthValue;
+import tools.refinery.store.tuple.Tuple;
+
+public interface MutableSeed<T> extends Seed<T> {
+        void mergeValue(Tuple tuple, T value);
+
+        void setIfMissing(Tuple tuple, T value);
+
+        void setAllMissing(T value);
+
+        void overwriteValues(MutableSeed<T> other);
+
+        static MutableSeed<TruthValue> of(int levels, TruthValue initialValue) {
+                if (levels == 0) {
+                        return new NullaryMutableSeed(initialValue);
+                } else {
+                        return new DecisionTree(levels, initialValue);
+                }
+        }
+}