[1589] Add filter to hide expose elements in SysON Explorer View

Bug: #1589
Signed-off-by: Florian ROUËNÉ <florian.rouene@obeosoft.com>

Author: frouene

CHANGELOG.adoc

@@ -17,6 +17,7 @@
 === New features
 
 - https://github.com/eclipse-syson/syson/issues/1581[#1581] [diagrams] Display inherited `PortUsages` as border nodes in diagrams
+- https://github.com/eclipse-syson/syson/issues/1589[#1589] [explorer] Add a filter to hide expose elements in `ViewUsage`
 
 == v2025.10.0
 

backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/explorer/view/ExplorerViewControllerIntegrationTests.java

@@ -142,6 +142,28 @@ public void testDirectEditOnViewUsage() {
 
     }
 
+    @DisplayName("GIVEN the SysON Explorer View, WHEN hide expose element filter is active, THEN the expose element are not return as tree item")
+    @Sql(scripts = { ExplorerViewDirectEditTestProjectData.SCRIPT_PATH }, executionPhase = Sql.ExecutionPhase.BEFORE_TEST_METHOD,
+            config = @SqlConfig(transactionMode = SqlConfig.TransactionMode.ISOLATED))
+    @Sql(scripts = { "/scripts/cleanup.sql" }, executionPhase = Sql.ExecutionPhase.AFTER_TEST_METHOD, config = @SqlConfig(transactionMode = SqlConfig.TransactionMode.ISOLATED))
+    @Test
+    public void testHideExposeElementFilter() {
+        var expandedIds = this.getAllTreeItemIds();
+        var activatedFilters = List.of(SysONTreeFilterProvider.HIDE_ROOT_NAMESPACES_ID, SysONTreeFilterProvider.HIDE_MEMBERSHIPS_TREE_ITEM_FILTER_ID, SysONTreeFilterProvider.HIDE_EXPOSE_ELEMENTS_TREE_ITEM_FILTER_ID);
+        var treeRepresentationId = this.representationIdBuilder.buildExplorerRepresentationId(this.sysONTreeViewDescriptionProvider.getDescriptionId(), expandedIds, activatedFilters);
+
+        var treeEventInput = new ExplorerEventInput(UUID.randomUUID(), ExplorerViewDirectEditTestProjectData.EDITING_CONTEXT_ID, treeRepresentationId);
+        var treeFlux = this.treeEventSubscriptionRunner.run(treeEventInput);
+
+        var hasNoExposeElement = assertRefreshedTreeThat(tree -> assertThat(tree.getChildren()).allSatisfy(this::assertNoExposeChildren));
+
+        StepVerifier.create(treeFlux)
+                .consumeNextWith(hasNoExposeElement)
+                .thenCancel()
+                .verify(Duration.ofSeconds(100));
+
+    }
+
     private List<String> getAllTreeItemIds() {
         var optionalEditingContext = this.editingContextSearchService.findById(ExplorerViewDirectEditTestProjectData.EDITING_CONTEXT_ID)
                 .filter(IEMFEditingContext.class::isInstance)
@@ -179,4 +201,17 @@ private Runnable triggerDirectEditTreeItemLabel(String editingContextId, String
             assertThat(initialDirectEditLabel).isEqualTo(expectedLabel);
         };
     }
+
+    private void assertNoExposeChildren(TreeItem item) {
+        if (item == null) {
+            return;
+        }
+        assertThat(item.getKind()).doesNotEndWith("entity=MembershipExpose");
+        List<TreeItem> children = item.getChildren();
+        if (children != null) {
+            for (TreeItem child : children) {
+                this.assertNoExposeChildren(child);
+            }
+        }
+    }
 }

backend/application/syson-application/src/test/resources/scripts/database-content/ExplorerView-DirectEdit.sql

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2024 Obeo.
+ * Copyright (c) 2024, 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
@@ -39,6 +39,8 @@ public class SysONTreeFilterProvider implements ITreeFilterProvider {
 
     public static final String HIDE_ROOT_NAMESPACES_ID = UUID.nameUUIDFromBytes("SysONTreeRootNamespacesFilter".getBytes()).toString();
 
+    public static final String HIDE_EXPOSE_ELEMENTS_TREE_ITEM_FILTER_ID = UUID.nameUUIDFromBytes("SysONTreeExposeElementsFilter".getBytes()).toString();
+
     @Override
     public List<TreeFilter> get(String editingContextId, TreeDescription treeDescription, String representationId) {
         List<TreeFilter> filters = new ArrayList<>();
@@ -47,6 +49,7 @@ public List<TreeFilter> get(String editingContextId, TreeDescription treeDescrip
         filters.add(new TreeFilter(HIDE_SYSML_STANDARD_LIBRARIES_TREE_FILTER_ID, "Hide SysML Standard Libraries", false));
         filters.add(new TreeFilter(HIDE_USER_LIBRARIES_TREE_FILTER_ID, "Hide User Libraries", false));
         filters.add(new TreeFilter(HIDE_ROOT_NAMESPACES_ID, "Hide Root Namespaces", true));
+        filters.add(new TreeFilter(HIDE_EXPOSE_ELEMENTS_TREE_ITEM_FILTER_ID, "Hide Expose Elements", true));
         return filters;
     }
 }

backend/views/syson-tree-explorer-view/src/main/java/org/eclipse/syson/tree/explorer/view/filters/SysONTreeFilterProvider.java

@@ -19,6 +19,7 @@
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.syson.services.UtilService;
 import org.eclipse.syson.services.api.ISysONResourceService;
+import org.eclipse.syson.sysml.Expose;
 import org.eclipse.syson.sysml.Membership;
 import org.eclipse.syson.sysml.Namespace;
 import org.eclipse.syson.sysml.util.ElementUtil;
@@ -106,6 +107,13 @@ public List<Object> hideRootNamespace(List<Object> elements) {
         return alteredElements;
     }
 
+    @Override
+    public List<Object> hideExposeElements(List<Object> elements) {
+        return elements.stream()
+                .filter(element -> !(element instanceof Expose))
+                .toList();
+    }
+
     @Override
     public List<Object> applyFilters(List<?> elements, List<String> activeFilterIds) {
         List<Object> alteredElements = new ArrayList<>(elements);
@@ -124,6 +132,9 @@ public List<Object> applyFilters(List<?> elements, List<String> activeFilterIds)
         if (activeFilterIds.contains(SysONTreeFilterProvider.HIDE_ROOT_NAMESPACES_ID)) {
             alteredElements = this.hideRootNamespace(alteredElements);
         }
+        if (activeFilterIds.contains(SysONTreeFilterProvider.HIDE_EXPOSE_ELEMENTS_TREE_ITEM_FILTER_ID)) {
+            alteredElements = this.hideExposeElements(alteredElements);
+        }
         return alteredElements;
     }
 

backend/views/syson-tree-explorer-view/src/main/java/org/eclipse/syson/tree/explorer/view/services/SysONExplorerFilterService.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2024 Obeo.
+ * Copyright (c) 2024, 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
@@ -37,5 +37,7 @@ public interface ISysONExplorerFilterService {
 
     List<Object> hideRootNamespace(List<Object> elements);
 
+    List<Object> hideExposeElements(List<Object> elements);
+
     List<Object> applyFilters(List<?> elements, List<String> activeFilterIds);
 }

backend/views/syson-tree-explorer-view/src/main/java/org/eclipse/syson/tree/explorer/view/services/api/ISysONExplorerFilterService.java

@@ -58,11 +58,14 @@ Ensure the desired tree items are expanded to effectively use the filter and hig
 [#filter-explorer]
 === Filter from kind
 
-Three filters are available in the {explorer} to filter element by kind:
+Six filters are available in the {explorer} to filter element by kind:
 
 * Hide Memberships,
 * Hide {kerml} Standard Libraries,
 * Hide {sysml} Standard Libraries.
+* Hide Root Namespaces
+* Hide User Librairies
+* Hide Root Namespaces
 
 These filters allow to clear the {explorer} view.
 By hiding the technical elements, only the data directly exploited by the user are displayed, which make the model more readable in the {explorer} view.
@@ -72,4 +75,4 @@ To filter elements in the {explorer} by their kind using the filter tool:
 . Click filter button,
 . Select filters to activate.
 
-image::hands-on-filter-element.png[Filter kind]
+image::hands-on-filter-element.png[Filter kind]