- Avoid NPE in getEStructuralFeature()

refs 2240

org.fortiss.tooling.base/trunk/src/org/fortiss/tooling/base/annotation/valueprovider/EStructuralFeatureValueProviderBase.java

@@ -39,7 +39,7 @@ import org.fortiss.tooling.base.model.element.IModelElement;
  * @author barner
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: 0B98B87CEB9B2AC5940668F4DD147710
+ * @ConQAT.Rating YELLOW Hash: 484315167A409237789D478428543CAF
  */
 public abstract class EStructuralFeatureValueProviderBase<T extends IAnnotatedSpecification>
 		extends ValueProviderBase<T> {
@@ -169,8 +169,10 @@ public abstract class EStructuralFeatureValueProviderBase<T extends IAnnotatedSp
 			throws Exception {
 		EStructuralFeatureDescriptor eStructuralFeatureDescriptor =
 				structuralFeatureDescriptorMap.get(instanceKey);
-		EStructuralFeature structuralFeature =
-				eStructuralFeatureDescriptor.getEStructuralFeature(specification);
+		EStructuralFeature structuralFeature = null;
+		if(eStructuralFeatureDescriptor != null) {
+			structuralFeature = eStructuralFeatureDescriptor.getEStructuralFeature(specification);
+		}
 		if(structuralFeature == null) {
 			throw new Exception("Instance key " + instanceKey +
 					" is unknown for annotation provider " +