YELLOW

org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/ConstraintService.java

@@ -46,7 +46,7 @@ import org.fortiss.tooling.kernel.service.IPersistencyService;
  * @author aravantinos
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: 57D86FA3AB9D46C3A625EBD926212424
+ * @ConQAT.Rating YELLOW Hash: 6AE7E4E99C508C7C8A299ED25460ECFE
  */
 public final class ConstraintService implements IIntrospectiveKernelService, IConstraintService {
 
@@ -164,7 +164,8 @@ public final class ConstraintService implements IIntrospectiveKernelService, ICo
 	@Override
 	public boolean isUpToDate(ConstraintInstance ci) {
 		if(ci == null) {
-			throw new NullPointerException();
+			// silently return in case of a null constraint instance
+			return true;
 		}
 		for(IConstrained c : ci.getConstraineds()) {
 			BigInteger computeCheckSum = computeCheckSum(c, ci);