1 files changed, 69 insertions, 0 deletions

diff --git a/subprojects/store-dse/src/main/java/tools/refinery/store/dse/transition/objectives/CompositeObjective.java b/subprojects/store-dse/src/main/java/tools/refinery/store/dse/transition/objectives/CompositeObjective.java
new file mode 100644
index 00000000..192a824b
--- /dev/null
+++ b/subprojects/store-dse/src/main/java/tools/refinery/store/dse/transition/objectives/CompositeObjective.java
@@ -0,0 +1,69 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.store.dse.transition.objectives;
+
+import tools.refinery.store.model.Model;
+import tools.refinery.store.model.ModelStore;
+import tools.refinery.store.model.ModelStoreBuilder;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+public class CompositeObjective implements Objective {
+        private final List<Objective> objectives;
+
+        CompositeObjective(Collection<? extends Objective> objectives) {
+                var unwrappedObjectives = new ArrayList<Objective>();
+                for (var objective : objectives) {
+                        if (objective instanceof CompositeObjective compositeObjective) {
+                                unwrappedObjectives.addAll(compositeObjective.getObjectives());
+                        } else {
+                                unwrappedObjectives.add(objective);
+                        }
+                }
+                this.objectives = Collections.unmodifiableList(unwrappedObjectives);
+        }
+
+        public List<Objective> getObjectives() {
+                return objectives;
+        }
+
+        @Override
+        public boolean isAlwaysZero(ModelStore store) {
+                for (var objective : objectives) {
+                        if (!objective.isAlwaysZero(store)) {
+                                return false;
+                        }
+                }
+                return true;
+        }
+
+        @Override
+        public ObjectiveCalculator createCalculator(Model model) {
+                var calculators = new ArrayList<ObjectiveCalculator>();
+                for (var objective : objectives) {
+                        if (!objective.isAlwaysZero(model.getStore())) {
+                                calculators.add(objective.createCalculator(model));
+                        }
+                }
+                return () -> {
+                        double value = 0;
+                        for (var calculator : calculators) {
+                                value += calculator.getValue();
+                        }
+                        return value;
+                };
+        }
+
+        @Override
+        public void configure(ModelStoreBuilder storeBuilder) {
+                for (var objective : objectives) {
+                        objective.configure(storeBuilder);
+                }
+        }
+}