Previously, JdbcCustomConversion rejected any default converter that was not converting from and to java.util.Date. This probably stemmed from the fact that up until recently, Spring Data Commons' CustomConversions only registered date related default converters. As of spring-projects/spring-data-commons#2315 we also support jMolecules' Association and Identifier converters. We've relaxed the rejection to only explicitly reject all non Date/Time related converters if the conversion is from/to java.util.Date but allow everything else out of the box.
Original pull request #937
faaaeab4b5