485539: [Performances - Facet Manager] FacetManager recomputes the

Facets for a given element too many times
https://bugs.eclipse.org/bugs/show_bug.cgi?id=485539

- Replace the custom property isVisible(EObject, EStructuralFeature)
with getVisibleReferences(EObject) and getVisibleAttributes(EObject).
This improves performances a lot, especially for complex metamodels such
as UML

Change-Id: I170b70774b8f6f19ded7fe1e824097b0c5cf7300
Signed-off-by: Camille Letavernier <camille.letavernier@cea.fr>

9 files changed, 248 insertions, 43 deletions

diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.classpath b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.classpath
index 2d1a4302f04..b862a296d38 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.classpath
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.classpath
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>

 <classpath>

-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>

+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>

 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>

 	<classpathentry kind="src" path="src"/>

 	<classpathentry kind="output" path="bin"/>

diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.settings/org.eclipse.jdt.core.prefs b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.settings/org.eclipse.jdt.core.prefs
index 4759947300a..62a08f4494d 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/.settings/org.eclipse.jdt.core.prefs
@@ -1,10 +1,10 @@
 eclipse.preferences.version=1

 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled

-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5

-org.eclipse.jdt.core.compiler.compliance=1.5

+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8

+org.eclipse.jdt.core.compiler.compliance=1.8

 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error

 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error

-org.eclipse.jdt.core.compiler.source=1.5

+org.eclipse.jdt.core.compiler.source=1.8

 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false

 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16

 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=0

diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/META-INF/MANIFEST.MF b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/META-INF/MANIFEST.MF
index 40375517a3a..e895e11360e 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/META-INF/MANIFEST.MF
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/META-INF/MANIFEST.MF
@@ -25,4 +25,4 @@ Bundle-Name: %Bundle-Name
 Bundle-Activator: org.eclipse.papyrus.emf.facet.custom.ui.internal.Activator

 Bundle-ManifestVersion: 2

 Bundle-SymbolicName: org.eclipse.papyrus.emf.facet.custom.ui;singleton:=true

-Bundle-RequiredExecutionEnvironment: J2SE-1.5

+Bundle-RequiredExecutionEnvironment: JavaSE-1.8

diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/resources/customproperties.efacet b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/resources/customproperties.efacet
index 0399612b056..93197289336 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/resources/customproperties.efacet
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/resources/customproperties.efacet
@@ -307,6 +307,26 @@
       <query

           xsi:type="query:FalseLiteralQuery"/>

     </facetOperations>

+    <facetOperations

+        name="visibleReferences"

+        upperBound="-1">

+      <eType

+          xsi:type="ecore:EClass"

+          href="http://www.eclipse.org/emf/2002/Ecore#//EReference"/>

+      <query

+          xsi:type="javaQuery:JavaQuery"

+          implementationClassName="org.eclipse.papyrus.emf.facet.custom.ui.internal.query.DefaultVisibleReferencesQuery"/>

+    </facetOperations>

+    <facetOperations

+        name="visibleAttributes"

+        upperBound="-1">

+      <eType

+          xsi:type="ecore:EClass"

+          href="http://www.eclipse.org/emf/2002/Ecore#//EAttribute"/>

+      <query

+          xsi:type="javaQuery:JavaQuery"

+          implementationClassName="org.eclipse.papyrus.emf.facet.custom.ui.internal.query.DefaultVisibleAttributesQuery"/>

+    </facetOperations>

   </eClassifiers>

   <eClassifiers

       xsi:type="efacet:Facet"

diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/IContentPropertiesHandler.java b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/IContentPropertiesHandler.java
index 1215c4bbfd7..6ae256b8abf 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/IContentPropertiesHandler.java
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/IContentPropertiesHandler.java
@@ -21,7 +21,34 @@ import org.eclipse.papyrus.emf.facet.efacet.metamodel.v0_2_0.efacet.FacetOperati
  * @noimplement This interface is not intended to be implemented by clients.

  */

 public interface IContentPropertiesHandler {

+

+	/**

+	 * The isVisible customization operation

+	 *

+	 * Since Papyrus 1.2.0, this operation is only used for Objects (Not Features)

+	 *

+	 * @return

+	 */

 	FacetOperation getIsVisible();

 

+	/**

+	 * Return the collapseLink customization operation

+	 *

+	 * @return

+	 */

 	public FacetOperation getCollapseLink();

+

+	/**

+	 * Return the getVisibleAttributes customization operation

+	 *

+	 * @return

+	 */

+	public FacetOperation getVisibleAttributes();

+

+	/**

+	 * Return the getVisibleReferences customization operation

+	 *

+	 * @return

+	 */

+	public FacetOperation getVisibleReferences();

 }

diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/CustomizedTreeContentProvider.java b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/CustomizedTreeContentProvider.java
index c6e86d7115a..73052bca244 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/CustomizedTreeContentProvider.java
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/CustomizedTreeContentProvider.java
@@ -30,7 +30,6 @@ import org.eclipse.emf.ecore.EAttribute;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EReference;
 import org.eclipse.emf.ecore.EStructuralFeature;
-import org.eclipse.emf.ecore.ETypedElement;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.papyrus.emf.facet.custom.core.ICustomizationManager;
 import org.eclipse.papyrus.emf.facet.custom.core.exception.CustomizationException;
@@ -140,6 +139,7 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		return result;
 	}
 
+	@Override
 	public Object[] getElements(final Object inputElement) {
 		// Reconcile the (possibly changed) list of root elements with our tree element proxies
 
@@ -161,7 +161,7 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		}
 
 		for (final Object element : elements) {
-			if (!isVisible(element, null)) {
+			if (!isVisible(element)) {
 				continue;
 			}
 
@@ -189,6 +189,7 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		return eObjectProxy;
 	}
 
+	@Override
 	public Object[] getChildren(final Object parentElement) {
 		Object[] result;
 		if (parentElement == null) {
@@ -320,6 +321,7 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		return children;
 	}
 
+	@Override
 	public Object getParent(final Object element) {
 		Object result = null;
 		if (element instanceof TreeElement) {
@@ -329,28 +331,31 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		return result;
 	}
 
+	@Override
 	public boolean hasChildren(final Object element) {
 		return getChildren(element).length > 0;
 	}
 
 
 
+	@Override
 	public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) {
 		if (oldInput != newInput) {
 			cache.clear();
 		}
 	}
 
+	@Override
 	public ICustomizationManager getCustomizationManager() {
 		return this.customManager;
 	}
 
-	public boolean isVisible(final Object object, final ETypedElement eTypedElement) {
+	public boolean isVisible(final Object object) {
 		Boolean result = Boolean.TRUE;
 		if (object instanceof EObject) {
 			final EObject eObject = (EObject) object;
 			try {
-				result = this.customManager.getCustomValueOf(eObject, eTypedElement, this.contentHandler.getIsVisible(), Boolean.class);
+				result = this.customManager.getCustomValueOf(eObject, this.contentHandler.getIsVisible(), Boolean.class);
 			} catch (final CustomizationException e) {
 				Logger.logError(e, Activator.getDefault());
 			}
@@ -376,7 +381,7 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 	private void createReferences(final EObjectTreeElement treeElement, Collection<EStructuralFeature> facetFeatures, Collection<Object> children) {
 		final EObject eObject = treeElement.getEObject();
 
-		for (EReference next : eObject.eClass().getEAllReferences()) {
+		for (EReference next : getVisibleReferences(eObject)) {
 			createReference(treeElement, eObject, next, children);
 		}
 		for (EStructuralFeature next : facetFeatures) {
@@ -387,26 +392,24 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 	}
 
 	private void createReference(EObjectTreeElement treeElement, EObject eObject, EReference eReference, Collection<Object> children) {
-		if (isVisible(eObject, eReference)) {
-			if (collapseLink(eObject, eReference)) {
-				if (eReference.getUpperBound() != 1) {
-					collectMultiValuedReferenceChildren(eReference, eObject, treeElement, children);
-				} else {
-					Object child = getSingleValuedReferenceChild(eReference, eObject, treeElement);
-					if (child != null) {
-						children.add(child);
-					}
-				}
+		if (collapseLink(eObject, eReference)) {
+			if (eReference.getUpperBound() != 1) {
+				collectMultiValuedReferenceChildren(eReference, eObject, treeElement, children);
 			} else {
-				children.add(getEReferenceProxy(eReference, treeElement));
+				Object child = getSingleValuedReferenceChild(eReference, eObject, treeElement);
+				if (child != null) {
+					children.add(child);
+				}
 			}
+		} else {
+			children.add(getEReferenceProxy(eReference, treeElement));
 		}
 	}
 
 	private void createAttributes(final EObjectTreeElement treeElement, Collection<EStructuralFeature> facetFeatures, Collection<? super TreeElement> children) {
 		final EObject eObject = treeElement.getEObject();
 
-		for (EAttribute next : eObject.eClass().getEAllAttributes()) {
+		for (EAttribute next : getVisibleAttributes(eObject)) {
 			createAttribute(treeElement, eObject, next, children);
 		}
 		for (EStructuralFeature next : facetFeatures) {
@@ -416,36 +419,48 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		}
 	}
 
+	private List<EAttribute> getVisibleAttributes(EObject eObject) {
+		List<EAttribute> result = null;
+		try {
+			result = this.customManager.getCustomValuesOf(eObject, this.contentHandler.getVisibleAttributes(), EAttribute.class);
+		} catch (final CustomizationException e) {
+			Logger.logError(e, Activator.getDefault());
+		}
+
+		return result == null ? Collections.emptyList() : result;
+	}
+
+	private List<EReference> getVisibleReferences(EObject eObject) {
+		List<EReference> result = null;
+		try {
+			result = this.customManager.getCustomValuesOf(eObject, this.contentHandler.getVisibleReferences(), EReference.class);
+		} catch (final CustomizationException e) {
+			Logger.logError(e, Activator.getDefault());
+		}
+
+		return result == null ? Collections.emptyList() : result;
+	}
+
 	private void createAttribute(EObjectTreeElement treeElement, EObject eObject, EAttribute eAttribute, Collection<? super TreeElement> children) {
-		if (isVisible(eObject, eAttribute)) {
-			TreeElement eAttributeTreeElement = getEAttributeProxy(eAttribute, treeElement);
-			if (eAttributeTreeElement != null) {
-				children.add(eAttributeTreeElement);
-			}
+		TreeElement eAttributeTreeElement = getEAttributeProxy(eAttribute, treeElement);
+		if (eAttributeTreeElement != null) {
+			children.add(eAttributeTreeElement);
 		}
 	}
 
 
 	private EReferenceTreeElement createReferenceProxy(final EReference reference, final EObjectTreeElement parent) {
-		final EObject eObject = parent.getEObject();
-		if (isVisible(eObject, reference)) {
-			final EReferenceTreeElement referenceProxy = TreeproxyFactory.eINSTANCE.createEReferenceTreeElement();
-			referenceProxy.setEReference(reference);
-			referenceProxy.setParent(parent);
-			return referenceProxy;
-		}
-		return null;
+		final EReferenceTreeElement referenceProxy = TreeproxyFactory.eINSTANCE.createEReferenceTreeElement();
+		referenceProxy.setEReference(reference);
+		referenceProxy.setParent(parent);
+		return referenceProxy;
 	}
 
 	private EAttributeTreeElement createAttributeProxy(final EAttribute attribute, final EObjectTreeElement parent) {
-		final EObject eObject = parent.getEObject();
-		if (isVisible(eObject, attribute)) {
-			final EAttributeTreeElement attributeProxy = TreeproxyFactory.eINSTANCE.createEAttributeTreeElement();
-			attributeProxy.setEAttribute(attribute);
-			attributeProxy.setParent(parent);
-			return attributeProxy;
-		}
-		return null;
+		final EAttributeTreeElement attributeProxy = TreeproxyFactory.eINSTANCE.createEAttributeTreeElement();
+		attributeProxy.setEAttribute(attribute);
+		attributeProxy.setParent(parent);
+		return attributeProxy;
 	}
 
 	private Object getSingleValuedReferenceChild(final EReference eReference, final EObject eObject, final TreeElement parent) {
@@ -502,6 +517,7 @@ public class CustomizedTreeContentProvider implements ICustomizedTreeContentProv
 		return (EReferenceTreeElement) cache.get(cacheElement);
 	}
 
+	@Override
 	public void dispose() {
 		cache.clear();
 		rootElements = null;
diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/PropertiesHandler.java b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/PropertiesHandler.java
index 482e8939219..a33fef2cef2 100644
--- a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/PropertiesHandler.java
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/PropertiesHandler.java
@@ -52,6 +52,8 @@ public class PropertiesHandler implements IContentPropertiesHandler,
 	private static final String IS_ITALIC = "isItalic"; //$NON-NLS-1$

 	private static final String COLLAPSE_LINK = "collapseLink"; //$NON-NLS-1$

 	private static final String IS_VISIBLE = "isVisible"; //$NON-NLS-1$

+	private static final String VISIBLE_REFERENCES = "visibleReferences"; //$NON-NLS-1$

+	private static final String VISIBLE_ATTRIBUTES = "visibleAttributes"; //$NON-NLS-1$

 	private static final String IS_UNDERLINED = "isUnderlined"; //$NON-NLS-1$

 	private static final String IS_STRUCKTHROUGH = "isStruckthrough"; //$NON-NLS-1$

 	private static final String TOP_L_OVERLAY = "topLeftOverlay"; //$NON-NLS-1$

@@ -126,56 +128,67 @@ public class PropertiesHandler implements IContentPropertiesHandler,
 	}

 

 

+	@Override

 	public FacetOperation getCollapseLink() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.COLLAPSE_LINK);

 	}

 

+	@Override

 	public FacetOperation getLabelProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.LABEL);

 	}

 

+	@Override

 	public FacetOperation getBackgroundProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.BACKGROUND);

 	}

 

+	@Override

 	public FacetOperation getForegroundProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.FOREGROUND);

 	}

 

+	@Override

 	public FacetOperation getFontNameProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.FONT);

 	}

 

+	@Override

 	public FacetOperation getFontSizeProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.FONT_SIZE);

 	}

 

+	@Override

 	public FacetOperation getIsBoldProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.IS_BOLD);

 	}

 

+	@Override

 	public FacetOperation getIsItalicProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.IS_ITALIC);

 	}

 

+	@Override

 	public FacetOperation getIsVisible() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.IS_VISIBLE);

 	}

 

+	@Override

 	public FacetOperation getIsUnderlinedProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.IS_UNDERLINED);

 	}

 

+	@Override

 	public FacetOperation getIsStruckthroughProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.IS_STRUCKTHROUGH);

@@ -211,6 +224,7 @@ public class PropertiesHandler implements IContentPropertiesHandler,
 				PropertiesHandler.BOTTOM_R_OVERLAY);

 	}

 

+	@Override

 	public FacetOperation getSelectionProperty() {

 		return getPropertyByName(PropertiesHandler.CUSTOM,

 				PropertiesHandler.SELECTION);

@@ -306,4 +320,26 @@ public class PropertiesHandler implements IContentPropertiesHandler,
 		return getPropertyByName(PropertiesHandler.TT_CUSTOM,

 				PropertiesHandler.SHADOW);

 	}

+

+	/**

+	 * @see org.eclipse.papyrus.emf.facet.custom.ui.IContentPropertiesHandler#getVisibleAttributes()

+	 *

+	 * @return

+	 */

+	@Override

+	public FacetOperation getVisibleAttributes() {

+		return getPropertyByName(PropertiesHandler.CUSTOM,

+				PropertiesHandler.VISIBLE_ATTRIBUTES);

+	}

+

+	/**

+	 * @see org.eclipse.papyrus.emf.facet.custom.ui.IContentPropertiesHandler#getVisibleReferences()

+	 *

+	 * @return

+	 */

+	@Override

+	public FacetOperation getVisibleReferences() {

+		return getPropertyByName(PropertiesHandler.CUSTOM,

+				PropertiesHandler.VISIBLE_REFERENCES);

+	}

 }
\ No newline at end of file
diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/query/DefaultVisibleAttributesQuery.java b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/query/DefaultVisibleAttributesQuery.java
new file mode 100644
index 00000000000..68912cf4308
--- /dev/null
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/query/DefaultVisibleAttributesQuery.java
@@ -0,0 +1,46 @@
+/*****************************************************************************
+ * Copyright (c) 2016 CEA LIST and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   CEA LIST - Initial API and implementation
+ *
+ *****************************************************************************/
+
+package org.eclipse.papyrus.emf.facet.custom.ui.internal.query;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.eclipse.emf.ecore.EAttribute;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager;
+import org.eclipse.papyrus.emf.facet.efacet.core.exception.DerivedTypedElementException;
+import org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2;
+import org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2;
+
+/**
+ * @author Camille Letavernier
+ *
+ */
+public class DefaultVisibleAttributesQuery implements IJavaQuery2<EObject, List<EAttribute>> {
+
+	/**
+	 * @see org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2#evaluate(org.eclipse.emf.ecore.EObject, org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2, org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager)
+	 *
+	 * @param source
+	 * @param parameterValues
+	 * @param facetManager
+	 * @return
+	 * @throws DerivedTypedElementException
+	 */
+	@Override
+	public List<EAttribute> evaluate(EObject source, IParameterValueList2 parameterValues, IFacetManager facetManager) throws DerivedTypedElementException {
+		return Collections.emptyList();
+	}
+
+}
diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/query/DefaultVisibleReferencesQuery.java b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/query/DefaultVisibleReferencesQuery.java
new file mode 100644
index 00000000000..c224ee07c8e
--- /dev/null
+++ b/plugins/facet/org.eclipse.papyrus.emf.facet.custom.ui/src/org/eclipse/papyrus/emf/facet/custom/ui/internal/query/DefaultVisibleReferencesQuery.java
@@ -0,0 +1,60 @@
+/*****************************************************************************
+ * Copyright (c) 2016 CEA LIST and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   CEA LIST - Initial API and implementation
+ *
+ *****************************************************************************/
+
+package org.eclipse.papyrus.emf.facet.custom.ui.internal.query;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager;
+import org.eclipse.papyrus.emf.facet.efacet.core.exception.DerivedTypedElementException;
+import org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2;
+import org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2;
+
+/**
+ * @author Camille Letavernier
+ *
+ */
+public class DefaultVisibleReferencesQuery implements IJavaQuery2<EObject, List<EReference>> {
+
+	/**
+	 * @see org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2#evaluate(org.eclipse.emf.ecore.EObject, org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2, org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager)
+	 *
+	 * @param source
+	 * @param parameterValues
+	 * @param facetManager
+	 * @return
+	 * @throws DerivedTypedElementException
+	 */
+	@Override
+	public List<EReference> evaluate(EObject source, IParameterValueList2 parameterValues, IFacetManager facetManager) throws DerivedTypedElementException {
+		return source.eClass().getEAllReferences().stream().filter(
+				ref -> !isEmpty(ref, source) //
+		).collect(Collectors.toList());
+	}
+
+	private boolean isEmpty(EReference reference, EObject source) {
+		Object value = source.eGet(reference);
+		if (value == null) {
+			return true;
+		}
+		if (value instanceof Collection) {
+			return ((Collection<?>) value).isEmpty();
+		}
+		return false;
+	}
+
+}