Fix Sonar issue

Author: garyrussell

spring-kafka/src/main/java/org/springframework/kafka/listener/adapter/MessagingMessageListenerAdapter.java

@@ -548,19 +548,12 @@ private Type extractGenericParameterTypFromMethodParameter(MethodParameter metho
 				genericParameterType = ((ParameterizedType) genericParameterType).getActualTypeArguments()[0];
 			}
 			else if (parameterizedType.getRawType().equals(List.class)
-					&& parameterizedType.getActualTypeArguments().length == 1) { // NOSONAR
+					&& parameterizedType.getActualTypeArguments().length == 1) {
 
 				Type paramType = parameterizedType.getActualTypeArguments()[0];
 				this.isConsumerRecordList = paramType.equals(ConsumerRecord.class)
-						|| (paramType instanceof ParameterizedType
-						&& ((ParameterizedType) paramType).getRawType().equals(ConsumerRecord.class)
-						|| (paramType instanceof WildcardType
-						&& ((WildcardType) paramType).getUpperBounds() != null
-						&& ((WildcardType) paramType).getUpperBounds().length > 0
-						&& ((WildcardType) paramType).getUpperBounds()[0] instanceof ParameterizedType
-						&& ((ParameterizedType) ((WildcardType)
-						paramType).getUpperBounds()[0]).getRawType().equals(ConsumerRecord.class))
-				);
+						|| (isSimpleListOfConsumerRecord(paramType)
+						|| isListOfConsumerRecordUpperBounded(paramType));
 				boolean messageHasGeneric = paramType instanceof ParameterizedType
 						&& ((ParameterizedType) paramType).getRawType().equals(Message.class);
 				this.isMessageList = paramType.equals(Message.class) || messageHasGeneric;
@@ -575,6 +568,24 @@ else if (parameterizedType.getRawType().equals(List.class)
 		return genericParameterType;
 	}
 
+	private boolean isSimpleListOfConsumerRecord(Type paramType) {
+		return paramType instanceof ParameterizedType
+				&& ((ParameterizedType) paramType).getRawType().equals(ConsumerRecord.class);
+	}
+
+	private boolean isListOfConsumerRecordUpperBounded(Type paramType) {
+		return isWildCardWithUpperBound(paramType)
+			&& ((WildcardType) paramType).getUpperBounds()[0] instanceof ParameterizedType
+			&& ((ParameterizedType) ((WildcardType) paramType).getUpperBounds()[0])
+						.getRawType().equals(ConsumerRecord.class);
+	}
+
+	private boolean isWildCardWithUpperBound(Type paramType) {
+		return paramType instanceof WildcardType
+			&& ((WildcardType) paramType).getUpperBounds() != null
+			&& ((WildcardType) paramType).getUpperBounds().length > 0;
+	}
+
 	/*
 	 * Don't consider parameter types that are available after conversion.
 	 * Acknowledgment, ConsumerRecord, Consumer, ConsumerRecord<...>, Consumer<...>, and Message<?>.