[3740] Add support for object duplication from Explorer

CHANGELOG.adoc

@@ -36,7 +36,7 @@ This may have some consequences for downstream applications which are embedding
 + Added by default to all sirius-web diagrams
 - https://github.com/eclipse-sirius/sirius-web/issues/4346[#4346] [query] Add support for a query view.
 Specifiers can contribute dedicated AQL services for this feature using implementations of `IInterpreterJavaServiceProvider`.
-
+- https://github.com/eclipse-sirius/sirius-web/issues/3740[#3740] [sirius-web] Add support for object duplication from explorer
 
 === Improvements
 

doc/iterations/2024.9/add_support_for_object_duplication.adoc

@@ -7,7 +7,8 @@ Currently, it is not possible to duplicate an object from the Explorer.
 == Key Result
 
 The user can duplicate a semantic object with contextual menu on tree items in the explorer.
-The user can choose 
+The user can choose
+
 * the target container where the duplicated object will be added
 * the target containment feature 
 * options to define how is duplicated the content of the duplicated object 
@@ -72,4 +73,4 @@ Nothing identified
 
 == No-gos
 
-Nothing identified
+Nothing identified

integration-tests/cypress/e2e/project/explorer/explorer-duplicate.cy.ts

@@ -0,0 +1,82 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+
+import { isCreateProjectFromTemplateSuccessPayload } from '../../../support/server/createProjectFromTemplateCommand';
+import { Project } from '../../../pages/Project';
+import { Explorer } from '../../../workbench/Explorer';
+
+describe('Explorer - duplicate object', () => {
+  let studioProjectId: string = '';
+  let domainName: string = '';
+  context('Given a studio with a domain', () => {
+    beforeEach(() => {
+      cy.createProjectFromTemplate('studio-template').then((res) => {
+        const payload = res.body.data.createProjectFromTemplate;
+        if (isCreateProjectFromTemplateSuccessPayload(payload)) {
+          const projectId = payload.project.id;
+          studioProjectId = projectId;
+
+          const project = new Project();
+          project.visit(projectId);
+
+          const explorer = new Explorer();
+          explorer.expandWithDoubleClick('DomainNewModel');
+          cy.get('[title="domain::Domain"]').then(($div) => {
+            domainName = $div.data().testid;
+            explorer.expandWithDoubleClick(domainName);
+            explorer.expandWithDoubleClick('Entity1');
+            explorer.expandWithDoubleClick('Entity2');
+          });
+        }
+      });
+    });
+
+    afterEach(() => cy.deleteProject(studioProjectId));
+
+    context('When we duplicate an object using the contextual menu', () => {
+      it('Then the object is twice in the explorer', () => {
+        const explorer = new Explorer();
+        explorer.getTreeItemByLabel('attribute2').should('have.length', 1);
+        cy.getByTestId('attribute2-more').click();
+        cy.getByTestId('duplicate-object').click();
+        cy.getByTestId('duplicate-object-tree').find(`[data-treeitemlabel="DomainNewModel"]`).dblclick();
+        cy.getByTestId('duplicate-object-tree').find(`[data-treeitemlabel="${domainName}"]`).dblclick();
+        cy.getByTestId('duplicate-object-tree').find(`[data-treeitemlabel="Entity2"]`).click();
+        cy.getByTestId('containment-feature-name')
+          .children('[role="combobox"]')
+          .invoke('text')
+          .should('eq', 'attributes');
+        cy.getByTestId('duplicate-object-button').click();
+        explorer.getTreeItemByLabel('attribute2').should('have.length', 2);
+      });
+    });
+
+    context('When we duplicate an object using the shortcut', () => {
+      it('Then the object is twice in the explorer', () => {
+        const explorer = new Explorer();
+        explorer.getTreeItemByLabel('attribute3').should('have.length', 1);
+        explorer.select('attribute3');
+        cy.getByTestId('attribute3').type('{ctrl}d');
+        cy.getByTestId('duplicate-object-tree').find(`[data-treeitemlabel="DomainNewModel"]`).dblclick();
+        cy.getByTestId('duplicate-object-tree').find(`[data-treeitemlabel="${domainName}"]`).dblclick();
+        cy.getByTestId('duplicate-object-tree').find(`[data-treeitemlabel="Entity2"]`).click();
+        cy.getByTestId('containment-feature-name')
+          .children('[role="combobox"]')
+          .invoke('text')
+          .should('eq', 'attributes');
+        cy.getByTestId('duplicate-object-button').click();
+        explorer.getTreeItemByLabel('attribute3').should('have.length', 2);
+      });
+    });
+  });
+});

packages/emf/backend/sirius-components-emf/src/main/java/org/eclipse/sirius/components/emf/utils/SiriusEMFCopier.java

@@ -0,0 +1,56 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.sirius.components.emf.utils;
+
+import org.eclipse.emf.ecore.EAttribute;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EStructuralFeature;
+import org.eclipse.emf.ecore.util.EcoreUtil;
+
+/**
+ * This class inherits from org.eclipse.emf.ecore.util.EcoreUtil.Copier to leverage protected methods.
+ *
+ * @author lfasani
+ */
+public class SiriusEMFCopier extends EcoreUtil.Copier {
+
+    /*
+     * This method copies the EObject with all its attributes but not its cross references nor its content.
+     * This code is partially copied from org.eclipse.emf.ecore.util.EcoreUtil.Copier.copy
+     * */
+    public EObject copyWithoutContent(EObject eObject) {
+        if (eObject == null) {
+            return null;
+        } else {
+            EObject copyEObject = this.createCopy(eObject);
+            if (copyEObject != null) {
+                this.put(eObject, copyEObject);
+                EClass eClass = eObject.eClass();
+                for (int i = 0, size = eClass.getFeatureCount(); i < size; ++i) {
+                    EStructuralFeature eStructuralFeature = eClass.getEStructuralFeature(i);
+                    if (eStructuralFeature.isChangeable() && !eStructuralFeature.isDerived()) {
+                        if (eStructuralFeature instanceof EAttribute) {
+                            this.copyAttribute((EAttribute) eStructuralFeature, eObject, copyEObject);
+                        }
+                    }
+                }
+
+                this.copyProxyURI(eObject, copyEObject);
+            }
+
+            return copyEObject;
+        }
+    }
+}

packages/sirius-web/backend/sirius-web-application/src/main/java/org/eclipse/sirius/web/application/object/DuplicateDialogTreeEventInput.java

@@ -0,0 +1,26 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.web.application.object;
+
+import java.util.UUID;
+
+import org.eclipse.sirius.components.core.api.IInput;
+
+/**
+ * The input of the duplicate dialog tree event subscription.
+ *
+ * @author frouene
+ */
+public record DuplicateDialogTreeEventInput(UUID id, String editingContextId, String representationId) implements IInput {
+
+}

packages/sirius-web/backend/sirius-web-application/src/main/java/org/eclipse/sirius/web/application/object/SubscriptionDuplicateDialogTreeEventDataFetcher.java

@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.web.application.object;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+import org.eclipse.sirius.components.annotations.spring.graphql.SubscriptionDataFetcher;
+import org.eclipse.sirius.components.core.api.IPayload;
+import org.eclipse.sirius.components.graphql.api.IDataFetcherWithFieldCoordinates;
+import org.eclipse.sirius.components.graphql.api.IEventProcessorSubscriptionProvider;
+import org.eclipse.sirius.components.graphql.api.IExceptionWrapper;
+import org.eclipse.sirius.components.graphql.api.LocalContextConstants;
+import org.reactivestreams.Publisher;
+
+import graphql.execution.DataFetcherResult;
+import graphql.schema.DataFetchingEnvironment;
+
+/**
+ * The data fetcher used to send the refreshed tree to a duplicate dialog subscription .
+ *
+ * @author frouene
+ */
+@SubscriptionDataFetcher(type = "Subscription", field = "duplicateDialogTreeEvent")
+public class SubscriptionDuplicateDialogTreeEventDataFetcher implements IDataFetcherWithFieldCoordinates<Publisher<DataFetcherResult<IPayload>>> {
+
+    private static final String INPUT_ARGUMENT = "input";
+
+    private final ObjectMapper objectMapper;
+
+    private final IExceptionWrapper exceptionWrapper;
+
+    private final IEventProcessorSubscriptionProvider eventProcessorSubscriptionProvider;
+
+    public SubscriptionDuplicateDialogTreeEventDataFetcher(ObjectMapper objectMapper, IExceptionWrapper exceptionWrapper, IEventProcessorSubscriptionProvider eventProcessorSubscriptionProvider) {
+        this.objectMapper = Objects.requireNonNull(objectMapper);
+        this.exceptionWrapper = Objects.requireNonNull(exceptionWrapper);
+        this.eventProcessorSubscriptionProvider = Objects.requireNonNull(eventProcessorSubscriptionProvider);
+    }
+
+    @Override
+    public Publisher<DataFetcherResult<IPayload>> get(DataFetchingEnvironment environment) throws Exception {
+        Object argument = environment.getArgument(INPUT_ARGUMENT);
+        var input = this.objectMapper.convertValue(argument, DuplicateDialogTreeEventInput.class);
+
+        Map<String, Object> localContext = new HashMap<>();
+        localContext.put(LocalContextConstants.EDITING_CONTEXT_ID, input.editingContextId());
+        localContext.put(LocalContextConstants.REPRESENTATION_ID, input.representationId());
+
+        return this.exceptionWrapper.wrapFlux(() -> this.eventProcessorSubscriptionProvider.getSubscription(input.editingContextId(), input.representationId(), input), input)
+                .map(payload -> DataFetcherResult.<IPayload>newResult()
+                        .data(payload)
+                        .localContext(localContext)
+                        .build());
+    }
+}

packages/sirius-web/backend/sirius-web-application/src/main/java/org/eclipse/sirius/web/application/views/explorer/controllers/EditingContextContainmentFeatureNamesDataFetcher.java

@@ -0,0 +1,55 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.web.application.views.explorer.controllers;
+
+import java.util.Objects;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+
+import org.eclipse.sirius.components.annotations.spring.graphql.QueryDataFetcher;
+import org.eclipse.sirius.components.collaborative.api.IEditingContextEventProcessorRegistry;
+import org.eclipse.sirius.components.core.api.IPayload;
+import org.eclipse.sirius.components.graphql.api.IDataFetcherWithFieldCoordinates;
+import org.eclipse.sirius.web.application.views.explorer.dto.EditingContextContainmentFeatureNamesInput;
+
+import graphql.schema.DataFetchingEnvironment;
+
+/**
+ * Data fetcher for the field EditingContext#containmentFeatureNames.
+ * It is used to find the containment feature names of a container object given the candidate contained object.
+ *
+ * @author lfasani
+ */
+@QueryDataFetcher(type = "EditingContext", field = "containmentFeatureNames")
+public class EditingContextContainmentFeatureNamesDataFetcher implements IDataFetcherWithFieldCoordinates<CompletableFuture<IPayload>> {
+    private static final String CONTAINER_ID = "containerId";
+
+    private static final String CONTAINED_OBJECT_ID = "containedObjectId";
+
+    private final IEditingContextEventProcessorRegistry editingContextEventProcessorRegistry;
+
+    public EditingContextContainmentFeatureNamesDataFetcher(IEditingContextEventProcessorRegistry editingContextEventProcessorRegistry) {
+        this.editingContextEventProcessorRegistry = Objects.requireNonNull(editingContextEventProcessorRegistry);
+    }
+
+    @Override
+    public CompletableFuture<IPayload> get(DataFetchingEnvironment environment) throws Exception {
+        String editingContextId = environment.getSource();
+        String containerId = environment.getArgument(CONTAINER_ID);
+        String containedObjectId = environment.getArgument(CONTAINED_OBJECT_ID);
+
+        EditingContextContainmentFeatureNamesInput input = new EditingContextContainmentFeatureNamesInput(UUID.randomUUID(), editingContextId, containerId, containedObjectId);
+        return this.editingContextEventProcessorRegistry.dispatchEvent(editingContextId, input)
+                .toFuture();
+    }
+}

packages/sirius-web/backend/sirius-web-application/src/main/java/org/eclipse/sirius/web/application/views/explorer/controllers/MutationDuplicateObjectDataFetcher.java

@@ -0,0 +1,54 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.web.application.views.explorer.controllers;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+
+import org.eclipse.sirius.components.annotations.spring.graphql.MutationDataFetcher;
+import org.eclipse.sirius.components.core.api.IPayload;
+import org.eclipse.sirius.components.graphql.api.IDataFetcherWithFieldCoordinates;
+import org.eclipse.sirius.components.graphql.api.IEditingContextDispatcher;
+import org.eclipse.sirius.web.application.views.explorer.dto.DuplicateObjectInput;
+
+import graphql.schema.DataFetchingEnvironment;
+
+/**
+ * Data fetcher for the field Mutation#duplicateObject.
+ *
+ * @author lfasani
+ */
+@MutationDataFetcher(type = "Mutation", field = "duplicateObject")
+public class MutationDuplicateObjectDataFetcher implements IDataFetcherWithFieldCoordinates<CompletableFuture<IPayload>> {
+
+    private static final String INPUT_ARGUMENT = "input";
+
+    private final ObjectMapper objectMapper;
+
+    private final IEditingContextDispatcher editingContextDispatcher;
+
+    public MutationDuplicateObjectDataFetcher(ObjectMapper objectMapper, IEditingContextDispatcher editingContextDispatcher) {
+        this.objectMapper = Objects.requireNonNull(objectMapper);
+        this.editingContextDispatcher = Objects.requireNonNull(editingContextDispatcher);
+    }
+
+    @Override
+    public CompletableFuture<IPayload> get(DataFetchingEnvironment environment) throws Exception {
+        Object argument = environment.getArgument(INPUT_ARGUMENT);
+        var input = this.objectMapper.convertValue(argument, DuplicateObjectInput.class);
+
+        return this.editingContextDispatcher.dispatchMutation(input.editingContextId(), input).toFuture();
+    }
+}