Resolve element type from NodeType before falling back to reflection when reading values from JsonNode.

This commit changes the node value retrieval so that it first tries to determine the node type before falling back to reflective access of the _value field.

Closes #2838
Original pull request: #2842

Author: christophstrobl

src/main/java/org/springframework/data/redis/hash/Jackson2HashMapper.java

@@ -436,8 +436,20 @@ private void flattenElement(String propertyPrefix, Object source, Map<String, Ob
 		} else if (element.isContainerNode()) {
 			doFlatten(propertyPrefix, element.fields(), resultMap);
 		} else {
-			resultMap.put(propertyPrefix, new DirectFieldAccessFallbackBeanWrapper(element)
-					.getPropertyValue("_value"));
+
+			switch (element.getNodeType()) {
+				case STRING -> resultMap.put(propertyPrefix, element.textValue());
+				case NUMBER -> resultMap.put(propertyPrefix, element.numberValue());
+				case BOOLEAN -> resultMap.put(propertyPrefix, element.booleanValue());
+				case BINARY -> {
+					try {
+						resultMap.put(propertyPrefix, element.binaryValue());
+					} catch (IOException e) {
+						throw new IllegalStateException(e);
+					}
+				}
+				default -> resultMap.put(propertyPrefix, new DirectFieldAccessFallbackBeanWrapper(element).getPropertyValue("_value"));
+			}
 		}
 	}