Add the following convenience methods

 - AllocationTable.getAllocationTableCollection()
 - AllocationTableCollection.getAllocationTable(Class<T> allocationTableType)
refs 3343

org.fortiss.af3.allocation/trunk/model/allocation.ecore

@@ -48,6 +48,21 @@
         </eGenericType>
       </eParameters>
     </eOperations>
+    <eOperations name="getAllocationTable">
+      <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
+        <details key="documentation" value="Returns the first {@link org.fortiss.af3.allocation.model.AllocationTable} contained by this {@link org.fortiss.af3.allocation.model.AllocationTableCollection} that is of the given {@link AllocationTable} specialization (or {@code null} in case it does not exist)."/>
+        <details key="body" value="return AllocationTableCollectionStaticImpl.getAllocationTable(this, allocationTableType);"/>
+      </eAnnotations>
+      <eGenericType eTypeParameter="#//AllocationTableCollection/getAllocationTable/T"/>
+      <eTypeParameters name="T">
+        <eBounds eClassifier="#//AllocationTable"/>
+      </eTypeParameters>
+      <eParameters name="allocationTableType">
+        <eGenericType eClassifier="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EJavaClass">
+          <eTypeArguments eTypeParameter="#//AllocationTableCollection/getAllocationTable/T"/>
+        </eGenericType>
+      </eParameters>
+    </eOperations>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="AllocationTable" abstract="true" eSuperTypes="platform:/resource/org.fortiss.tooling.base/model/base.ecore#//base/HierarchicElementBase">
     <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
@@ -273,6 +288,12 @@
         <details key="body" value="AllocationTableStaticImpl.clearAllocationEntries(this);"/>
       </eAnnotations>
     </eOperations>
+    <eOperations name="getAllocationTableCollection" eType="#//AllocationTableCollection">
+      <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
+        <details key="documentation" value="Returns the {@link AllocationTableCollection} that owns this {@link AllocationTable}."/>
+        <details key="body" value="return AllocationTableStaticImpl.getAllocationTableCollection(this);"/>
+      </eAnnotations>
+    </eOperations>
     <eStructuralFeatures xsi:type="ecore:EReference" name="sourceView" eType="ecore:EClass platform:/resource/org.fortiss.tooling.kernel/model/kernel.ecore#//IProjectRootElement">
       <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
         <details key="documentation" value="Source model for which to define {@link Allocation}."/>

org.fortiss.af3.allocation/trunk/model/allocation.genmodel

@@ -19,6 +19,10 @@
       <genOperations ecoreOperation="allocation.ecore#//AllocationTableCollection/getAllocationTables.2">
         <genParameters ecoreParameter="allocation.ecore#//AllocationTableCollection/getAllocationTables.2/allocationTypes"/>
       </genOperations>
+      <genOperations ecoreOperation="allocation.ecore#//AllocationTableCollection/getAllocationTable">
+        <genParameters ecoreParameter="allocation.ecore#//AllocationTableCollection/getAllocationTable/allocationTableType"/>
+        <genTypeParameters ecoreTypeParameter="allocation.ecore#//AllocationTableCollection/getAllocationTable/T"/>
+      </genOperations>
     </genClasses>
     <genClasses ecoreClass="allocation.ecore#//AllocationTable">
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference allocation.ecore#//AllocationTable/sourceView"/>
@@ -77,6 +81,7 @@
         <genTypeParameters ecoreTypeParameter="allocation.ecore#//AllocationTable/getSourceElements.2/T"/>
       </genOperations>
       <genOperations ecoreOperation="allocation.ecore#//AllocationTable/clearAllocationEntries"/>
+      <genOperations ecoreOperation="allocation.ecore#//AllocationTable/getAllocationTableCollection"/>
     </genClasses>
     <genClasses image="false" ecoreClass="allocation.ecore#//AllocationEntry">
       <genOperations ecoreOperation="allocation.ecore#//AllocationEntry/getAllocationTable"/>

org.fortiss.af3.allocation/trunk/src/org/fortiss/af3/allocation/model/impl/.ratings

 AF3AllocationFactoryImplCustom.java 46630be40ab1aa52cd8312c2abac7572cef06f41 GREEN
 AllocationEntryStaticImpl.java c32ceaafa60123f19e852b63860e62613ed98802 GREEN
-AllocationTableCollectionStaticImpl.java c8c413bf4c09cbba4bf1b47a86b693b5417b4062 GREEN
-AllocationTableStaticImpl.java 7acbe1b798a25908a23c30602a9929cc6f194663 GREEN
+AllocationTableCollectionStaticImpl.java 51aea2faf56a9193e1361b79dfb92d428e0a3370 YELLOW
+AllocationTableStaticImpl.java 3e9de4c1cc01c472874e3885bb33260a227efad6 YELLOW
 ParameterEntryStaticImpl.java 06582395715b198d2ffbfe0bafb81f10897a3149 GREEN
 ParameterTableStaticImpl.java cd90fc207370734ea590bdabc65a30efa8cb6e79 GREEN

org.fortiss.af3.allocation/trunk/src/org/fortiss/af3/allocation/model/impl/AllocationTableCollectionStaticImpl.java

@@ -17,6 +17,7 @@ package org.fortiss.af3.allocation.model.impl;
 
 import static org.eclipse.emf.common.util.ECollections.singletonEList;
 import static org.fortiss.tooling.common.util.LambdaUtils.filterByTypes;
+import static org.fortiss.tooling.kernel.utils.EcoreUtils.pickFirstInstanceOf;
 import static org.fortiss.tooling.kernel.utils.EcoreUtils.pickInstanceOf;
 
 import org.eclipse.emf.common.util.BasicEList;
@@ -93,4 +94,27 @@ public class AllocationTableCollectionStaticImpl {
 		Class<?>[] types = new Class<?>[allocationTypes.size()];
 		return new BasicEList<AllocationTable>(filterByTypes(ats, allocationTypes.toArray(types)));
 	}
+
+	/**
+	 * Returns the first {@link org.fortiss.af3.allocation.model.AllocationTable} contained by this
+	 * {@link org.fortiss.af3.allocation.model.AllocationTableCollection} that is of the given
+	 * {@link AllocationTable} specialization (or {@code null} in case it does not exist).
+	 * 
+	 * @param allocationTableCollection
+	 *            {@link AllocationTableCollection} for which to the return the contained
+	 *            {@link AllocationTable}
+	 * 
+	 * @param allocationTableType
+	 *            Type of desired {@link AllocationTable} specialization.
+	 * 
+	 * @return First {@link org.fortiss.af3.allocation.model.AllocationTable} contained by this
+	 *         {@link org.fortiss.af3.allocation.model.AllocationTableCollection} that is of the
+	 *         given {@link AllocationTable} specialization (or {@code null} in case it does not
+	 *         exist).
+	 */
+	public static <T extends AllocationTable> T getAllocationTable(
+			AllocationTableCollection allocationTableCollection, Class<T> allocationTableType) {
+		return pickFirstInstanceOf(allocationTableType,
+				allocationTableCollection.getAllocationTables());
+	}
 }

org.fortiss.af3.allocation/trunk/src/org/fortiss/af3/allocation/model/impl/AllocationTableStaticImpl.java

@@ -27,6 +27,7 @@ import org.eclipse.emf.common.util.EList;
 import org.eclipse.emf.ecore.EOperation;
 import org.fortiss.af3.allocation.model.AllocationEntry;
 import org.fortiss.af3.allocation.model.AllocationTable;
+import org.fortiss.af3.allocation.model.AllocationTableCollection;
 import org.fortiss.af3.allocation.model.IBidirectional;
 import org.fortiss.af3.allocation.model.IUnidirectional;
 import org.fortiss.af3.allocation.model.ManyToOneAllocationEntry;
@@ -446,4 +447,11 @@ public class AllocationTableStaticImpl {
 		// Eliminate duplicates that might arise from overlaps
 		return toEList(rval);
 	}
+
+	/** Returns the {@link AllocationTableCollection} that owns the given {@link AllocationTable}. */
+	public static AllocationTableCollection getAllocationTableCollection(
+			AllocationTable allocationTable) {
+
+		return (AllocationTableCollection)allocationTable.getContainer();
+	}
 }