1 files changed, 48 insertions, 0 deletions

diff --git a/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/actions/FocusActionLiteral.java b/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/actions/FocusActionLiteral.java
new file mode 100644
index 00000000..5a6f22d2
--- /dev/null
+++ b/subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/actions/FocusActionLiteral.java
@@ -0,0 +1,48 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.store.reasoning.actions;
+
+import tools.refinery.store.dse.transition.actions.AbstractActionLiteral;
+import tools.refinery.store.dse.transition.actions.BoundActionLiteral;
+import tools.refinery.store.model.Model;
+import tools.refinery.store.query.term.NodeVariable;
+import tools.refinery.store.reasoning.ReasoningAdapter;
+
+import java.util.List;
+
+public class FocusActionLiteral extends AbstractActionLiteral {
+        private final NodeVariable parentNode;
+        private final NodeVariable childNode;
+
+        public FocusActionLiteral(NodeVariable parentNode, NodeVariable childNode) {
+                this.parentNode = parentNode;
+                this.childNode = childNode;
+        }
+
+        public NodeVariable getParentNode() {
+                return parentNode;
+        }
+
+        public NodeVariable getChildNode() {
+                return childNode;
+        }
+
+        @Override
+        public List<NodeVariable> getInputVariables() {
+                return List.of(parentNode);
+        }
+
+        @Override
+        public List<NodeVariable> getOutputVariables() {
+                return List.of(childNode);
+        }
+
+        @Override
+        public BoundActionLiteral bindToModel(Model model) {
+                var reasoningAdapter = model.getAdapter(ReasoningAdapter.class);
+                return tuple -> reasoningAdapter.focus(tuple.get(0));
+        }
+}