[2387] Add support of objective inheritance in objective compartment

CHANGELOG.adoc

@@ -56,6 +56,7 @@ This removes Rollup warnings about missing global names for externalized peer de
 - https://github.com/eclipse-syson/syson/issues/2378[#2378] [diagrams] Add support of framed concern inheritance in frames compartment of RequirementUsage and RequirementDefinition.
 - https://github.com/eclipse-syson/syson/issues/2380[#2380] [diagrams] Add support of `SatisfyRequirementUsage` inheritance in _satisfy requirements_ compartment of `PartUsage` and `PartDefinition` graphical nodes.
 - https://github.com/eclipse-syson/syson/issues/2382[#2382] [diagrams] Add support of stakeholder inheritance in _stakeholders_ compartments of `RequirementUsage` and `RequirementDefinition` graphical nodes.
+- https://github.com/eclipse-syson/syson/issues/2387[#2387] [diagrams] Add support of objective requirement inheritance in _objective_ compartments of `CaseUsage` and `CaseDefinition` graphical nodes.
 
 == v2026.7.0
 

backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/diagrams/general/view/GVCompartmentItemInheritanceTests.java

@@ -23,6 +23,7 @@
 import java.util.UUID;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
+import java.util.stream.Stream;
 
 import org.eclipse.emf.ecore.EClass;
 import org.eclipse.sirius.components.collaborative.diagrams.dto.DiagramEventInput;
@@ -52,6 +53,9 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.transaction.annotation.Transactional;
@@ -916,6 +920,32 @@ public void checkConcernUsageStakeholdersInheritanceWithReferenceSubsetting() {
                 .run();
     }
 
+    private static Stream<Arguments> objectiveInheritanceParameters() {
+        return Stream.of(
+                Arguments.of("New Case Definition", "New Subclassification", SysmlPackage.eINSTANCE.getCaseDefinition(), GeneralViewWithTopNodesTestProjectData.GraphicalIds.CASE_DEFINITION_ID),
+                Arguments.of("New Case", "New Redefinition", SysmlPackage.eINSTANCE.getCaseUsage(), GeneralViewWithTopNodesTestProjectData.GraphicalIds.CASE_USAGE_ID),
+                Arguments.of("New Case", "New Subsetting", SysmlPackage.eINSTANCE.getCaseUsage(), GeneralViewWithTopNodesTestProjectData.GraphicalIds.CASE_USAGE_ID),
+                Arguments.of("New Case", "New Reference Subsetting", SysmlPackage.eINSTANCE.getCaseUsage(), GeneralViewWithTopNodesTestProjectData.GraphicalIds.CASE_USAGE_ID)
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("objectiveInheritanceParameters")
+    public void checkObjectiveInheritanceWithSpecialization(String subclassifier, String specialization, EClass eClass, String baseElementNodeId) {
+        new ElementSpecializationInheritanceTestRunner()
+                .baseElementToInheritFromEClass(eClass)
+                .baseElementToInheritFromNodeId(baseElementNodeId)
+                .elementToInheritCreationToolName("New Objective")
+                .withEdgeExpected()
+                .withSelectedElementId("")
+                .elementToInheritExpectedListItemLabelText("requirement1")
+                .compartmentName("objective")
+                .elementThatInheritFromBaseElementCreationToolName(subclassifier)
+                .elementThatInheritFromBaseElementEClass(eClass)
+                .specializationToolName(specialization)
+                .run();
+    }
+
     /**
      * This test runner verifies that creating a specializing relationship create inherited elements.
      *

backend/application/syson-application/src/test/java/org/eclipse/syson/application/data/GeneralViewWithTopNodesTestProjectData.java

@@ -75,6 +75,11 @@ public static class GraphicalIds {
         public static final String PORT_DEFINITION_ID = "bad8fa43-eb03-35dd-a025-34fd2e71d5a3";
 
         public static final String SATISFY_REQUIREMENT_USAGE_ID = "450a4e50-c67b-3c40-8801-64aa0cd85bd6";
+
+        public static final String CASE_DEFINITION_ID = "92a34fc4-058e-34c2-b4fa-829b5ef11090";
+
+        public static final String CASE_USAGE_ID = "0e713cc2-1872-31ec-ad87-c9d85b692458";
+
     }
 
     /**

backend/services/syson-diagram-services/src/main/java/org/eclipse/syson/diagram/services/InheritedCompartmentItemFilterSwitch.java

@@ -26,12 +26,14 @@
 import org.eclipse.syson.sysml.Definition;
 import org.eclipse.syson.sysml.ExhibitStateUsage;
 import org.eclipse.syson.sysml.Feature;
+import org.eclipse.syson.sysml.ObjectiveMembership;
 import org.eclipse.syson.sysml.OwningMembership;
 import org.eclipse.syson.sysml.PartUsage;
 import org.eclipse.syson.sysml.PerformActionUsage;
 import org.eclipse.syson.sysml.ReferenceUsage;
 import org.eclipse.syson.sysml.RequirementConstraintKind;
 import org.eclipse.syson.sysml.RequirementConstraintMembership;
+import org.eclipse.syson.sysml.RequirementUsage;
 import org.eclipse.syson.sysml.SatisfyRequirementUsage;
 import org.eclipse.syson.sysml.StakeholderMembership;
 import org.eclipse.syson.sysml.StateUsage;
@@ -142,19 +144,17 @@ public Boolean caseFeature(Feature object) {
      */
     @Override
     public Boolean casePartUsage(PartUsage object) {
-        boolean result;
+        final boolean result;
         if (this.shouldConsiderParameter(object)) {
             result = this.isInheritedParameter(object);
         } else if (this.isStakeholderReference()) {
             // We are dealing with a stakeholder
-            var membership = object.getOwningMembership();
             // so the part usage is a stakeholder if and only if, it is contained by a StakeholderMembership
-            result =  membership instanceof StakeholderMembership;
-        } if (this.isActorReference()) {
-            // We are dealing with an Actor?
-            var membership = object.getOwningMembership();
+            result =  object.getOwningMembership() instanceof StakeholderMembership;
+        } else if (this.isActorReference()) {
+            // We are dealing with an Actor
             // so the part usage is an actor if and only if, it is contained by a ActorMembership
-            result =  membership instanceof ActorMembership;
+            result =  object.getOwningMembership() instanceof ActorMembership;
         } else {
             EClassifier eType = this.eReference.getEType();
             EClass eClass = object.eClass();
@@ -211,6 +211,26 @@ public Boolean caseReferenceUsage(ReferenceUsage object) {
         return eType.equals(eClass) || (eType instanceof EClass eTypeEClass && eTypeEClass.isSuperTypeOf(eClass));
     }
 
+    @Override
+    public Boolean caseRequirementUsage(RequirementUsage object) {
+        final boolean result;
+        if (this.isObjectiveReference()) {
+            // We are dealing with an objective
+            // so the part usage is an objective if and only if, it is contained by an ObjectiveMembership
+            result =  object.getOwningMembership() instanceof ObjectiveMembership;
+        } else {
+            EClassifier eType = this.eReference.getEType();
+            EClass eClass = object.eClass();
+            return eType.equals(eClass) || (eType instanceof EClass eTypeEClass && eTypeEClass.isSuperTypeOf(eClass));
+        }
+        return result;
+    }
+
+    private boolean isObjectiveReference() {
+        return this.eReference.equals(SysmlPackage.eINSTANCE.getCaseDefinition_ObjectiveRequirement()) ||
+                this.eReference.equals(SysmlPackage.eINSTANCE.getCaseUsage_ObjectiveRequirement());
+    }
+
     /**
      * Filters inherited satisfy requirement usages against the targeted compartment.
      *

backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/SDVDiagramDescriptionProvider.java

@@ -848,18 +848,15 @@ private List<IDiagramElementDescriptionProvider<?>> createCompartmentsForObjecti
         final List<IDiagramElementDescriptionProvider<?>> compartmentNodeDescriptionProviders = new ArrayList<>();
 
         compartmentNodeDescriptionProviders.add(new CaseDefinitionObjectiveRequirementCompartmentNodeDescriptionProvider(colorProvider, this.getDescriptionNameGenerator()));
-        compartmentNodeDescriptionProviders.add(new CompartmentItemNodeDescriptionProvider(SysmlPackage.eINSTANCE.getCaseDefinition(),
-                SysmlPackage.eINSTANCE.getCaseDefinition_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
-        compartmentNodeDescriptionProviders
-                .add(new ObjectiveDocumentationCompartmentItemNodeDescription(SysmlPackage.eINSTANCE.getCaseDefinition(), SysmlPackage.eINSTANCE.getCaseDefinition_ObjectiveRequirement(),
-                        colorProvider, this.getDescriptionNameGenerator()));
+        compartmentNodeDescriptionProviders.add(new CompartmentItemNodeDescriptionProvider(SysmlPackage.eINSTANCE.getCaseDefinition(), SysmlPackage.eINSTANCE.getCaseDefinition_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
+        compartmentNodeDescriptionProviders.add(new ObjectiveDocumentationCompartmentItemNodeDescription(SysmlPackage.eINSTANCE.getCaseDefinition(), SysmlPackage.eINSTANCE.getCaseDefinition_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
 
         compartmentNodeDescriptionProviders.add(new CaseUsageObjectiveRequirementCompartmentNodeDescriptionProvider(colorProvider, this.getDescriptionNameGenerator()));
-        compartmentNodeDescriptionProviders.add(new CompartmentItemNodeDescriptionProvider(SysmlPackage.eINSTANCE.getCaseUsage(), SysmlPackage.eINSTANCE.getCaseUsage_ObjectiveRequirement(),
-                colorProvider, this.getDescriptionNameGenerator()));
-        compartmentNodeDescriptionProviders
-                .add(new ObjectiveDocumentationCompartmentItemNodeDescription(SysmlPackage.eINSTANCE.getCaseUsage(), SysmlPackage.eINSTANCE.getCaseUsage_ObjectiveRequirement(),
-                        colorProvider, this.getDescriptionNameGenerator()));
+        compartmentNodeDescriptionProviders.add(new CompartmentItemNodeDescriptionProvider(SysmlPackage.eINSTANCE.getCaseUsage(), SysmlPackage.eINSTANCE.getCaseUsage_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
+        compartmentNodeDescriptionProviders.add(new ObjectiveDocumentationCompartmentItemNodeDescription(SysmlPackage.eINSTANCE.getCaseUsage(), SysmlPackage.eINSTANCE.getCaseUsage_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
+
+        compartmentNodeDescriptionProviders.add(new InheritedCompartmentItemNodeDescriptionProvider(SysmlPackage.eINSTANCE.getCaseDefinition(), SysmlPackage.eINSTANCE.getCaseDefinition_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
+        compartmentNodeDescriptionProviders.add(new InheritedCompartmentItemNodeDescriptionProvider(SysmlPackage.eINSTANCE.getCaseUsage(), SysmlPackage.eINSTANCE.getCaseUsage_ObjectiveRequirement(), colorProvider, this.getDescriptionNameGenerator()));
 
         return compartmentNodeDescriptionProviders;
     }

doc/content/modules/user-manual/pages/release-notes/2026.9.0.adoc

@@ -10,11 +10,10 @@
 ** Add support of framed concern inheritance in _frames_ compartments of `RequirementUsage` and `RequirementDefinition` graphical nodes.
 ** Add support of `ItemUsage` inheritance in _items_ compartments of `PortUsage` and `PortDefinition` graphical nodes.
 ** Add support of assume constraint inheritance in _assume constraints_ compartments of `RequirementUsage` and `RequirementDefinition` graphical nodes.
-
 ** Add support of require constraints inheritance in _require constraints_ compartments of `RequirementUsage`, `RequirementDefinition` and subtypes graphical nodes.
 ** Add support of stakeholder inheritance in _stakeholders_ compartments of `RequirementUsage` and `RequirementDefinition` graphical nodes.
-
 ** Add support of `SatisfyRequirementUsage` inheritance in _satisfy requirements_ compartment of `PartUsage` and `PartDefinition` graphical nodes.
+** Add support of objective requirement inheritance in _objective_ compartments of `CaseUsage` and `CaseDefinition` graphical nodes.
 
 * In textual import/export: