Attempt early usage of custom converters.

We now try to eagerly apply a custom converter when reading Redis properties in the MappingRedisConverter before considering type hints from the hash.

We require type hints to properly restore the target type for a hash entry as Redis data is all byte arrays, so a simple String needs a type hint before we can load it back into an e.g. Object-typed property. Subtypes of properties (such as ZoneRegion for ZoneId) are sometimes not associated with a converter as only the parent type (ZoneId) is associated with a converter. Trying to convert the value into the subtype directly through our ConversionService would fail in that case.

Closes #2307

src/main/java/org/springframework/data/redis/core/convert/MappingRedisConverter.java

@@ -319,6 +319,10 @@ public class MappingRedisConverter implements RedisConverter, InitializingBean {
 			return null;
 		}
 
+		if (customConversions.hasCustomReadTarget(byte[].class, persistentProperty.getType())) {
+			return fromBytes(sourceBytes, persistentProperty.getType());
+		}
+
 		Class<?> typeToUse = getTypeHint(currentPath, source.getBucket(), persistentProperty.getType());
 		return fromBytes(sourceBytes, typeToUse);
 	}
@@ -728,8 +732,7 @@ public class MappingRedisConverter implements RedisConverter, InitializingBean {
 	 * @param sink
 	 */
 	private void writeCollection(@Nullable String keyspace, String path, @Nullable Iterable<?> values,
-			TypeInformation<?> typeHint,
-			RedisData sink) {
+			TypeInformation<?> typeHint, RedisData sink) {
 
 		if (values == null) {
 			return;