1 files changed, 42 insertions, 0 deletions

diff --git a/subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/CardinalityDomain.java b/subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/CardinalityDomain.java
new file mode 100644
index 00000000..29775615
--- /dev/null
+++ b/subprojects/logic/src/main/java/tools/refinery/logic/term/cardinalityinterval/CardinalityDomain.java
@@ -0,0 +1,42 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.logic.term.cardinalityinterval;
+
+import tools.refinery.logic.AbstractDomain;
+
+// Singleton pattern, because there is only one domain for truth values.
+@SuppressWarnings("squid:S6548")
+public class CardinalityDomain implements AbstractDomain<CardinalityInterval, Integer> {
+        public static final CardinalityDomain INSTANCE = new CardinalityDomain();
+
+        private CardinalityDomain() {
+        }
+
+        @Override
+        public Class<CardinalityInterval> abstractType() {
+                return CardinalityInterval.class;
+        }
+
+        @Override
+        public Class<Integer> concreteType() {
+                return Integer.class;
+        }
+
+        @Override
+        public CardinalityInterval unknown() {
+                return CardinalityIntervals.SET;
+        }
+
+        @Override
+        public CardinalityInterval error() {
+                return CardinalityIntervals.ERROR;
+        }
+
+        @Override
+        public CardinalityInterval toAbstract(Integer concreteValue) {
+                return CardinalityIntervals.exactly(concreteValue);
+        }
+}