Annotations: Add migrator to ensure their existence after startup

Issue-Ref: 3746
Issue-Url: https://af3-developer.fortiss.org/issues/3746


Signed-off-by: Alexander Diewald <diewald@fortiss.org>

org.fortiss.tooling.base/plugin.xml

@@ -37,9 +37,11 @@
    </extension>
    
    <extension point="org.fortiss.tooling.kernel.migrationProvider">
+      <migrationProvider migrationProvider="org.fortiss.tooling.base.migration.AddMissingAnnotationsMigrationProvider">
+         <objectClass objectClass="org.fortiss.tooling.kernel.extension.data.ITopLevelElement"/>
+      </migrationProvider>
       <migrationProvider migrationProvider="org.fortiss.tooling.base.migration.RemoveDuplicatedAnnotationsMigrationProvider">
          <objectClass objectClass="org.fortiss.tooling.kernel.extension.data.ITopLevelElement"/>
       </migrationProvider>
-
    </extension>
 </plugin>

org.fortiss.tooling.base/src/org/fortiss/tooling/base/migration/.ratings

+AddMissingAnnotationsMigrationProvider.java 8424a4e54cd747e2d9af9b85d8b9d4a2440456c3 YELLOW
 RemoveDuplicatedAnnotationsMigrationProvider.java f1bdb4733d5b9c6003a2b7fee59b89240a0a3b61 GREEN
 RemoveOutdatedAnnotationInstanceMigrationProvider.java 29c29f2bb7515cad1de45a30ffc185001b47a016 GREEN

org.fortiss.tooling.base/src/org/fortiss/tooling/base/migration/AddMissingAnnotationsMigrationProvider.java

+/*-------------------------------------------------------------------------+
+| Copyright 2019 fortiss GmbH                                              |
+|                                                                          |
+| Licensed under the Apache License, Version 2.0 (the "License");          |
+| you may not use this file except in compliance with the License.         |
+| You may obtain a copy of the License at                                  |
+|                                                                          |
+|    http://www.apache.org/licenses/LICENSE-2.0                            |
+|                                                                          |
+| Unless required by applicable law or agreed to in writing, software      |
+| distributed under the License is distributed on an "AS IS" BASIS,        |
+| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+| See the License for the specific language governing permissions and      |
+| limitations under the License.                                           |
++--------------------------------------------------------------------------*/
+package org.fortiss.tooling.base.migration;
+
+import static org.fortiss.tooling.base.utils.AnnotationUtils.instantiateAnnotationsRecursive;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Map;
+
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.xml.type.AnyType;
+import org.fortiss.tooling.base.model.element.IModelElement;
+import org.fortiss.tooling.kernel.extension.IMigrationProvider;
+import org.fortiss.tooling.kernel.extension.data.ITopLevelElement;
+
+/**
+ * Adds missing annotations to {@link IModelElement}s.
+ * 
+ * @author diewald
+ */
+public class AddMissingAnnotationsMigrationProvider implements IMigrationProvider {
+
+	/** Remembers the processed {@link ITopLevelElement}s. */
+	Collection<ITopLevelElement> migratedProjects = new ArrayList<>();
+
+	/** {@inheritDoc} */
+	@Override
+	public boolean needMigration(ITopLevelElement modelElement,
+			Map<EObject, AnyType> unknownFeatures) {
+		if(migratedProjects.contains(modelElement)) {
+			return false;
+		}
+		return true;
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public void migrate(ITopLevelElement modelElement, Map<EObject, AnyType> unknownFeatures) {
+		EObject rootElement = modelElement.getRootModelElement();
+		instantiateAnnotationsRecursive(rootElement);
+		migratedProjects.add(modelElement);
+	}
+}