DATACMNS-1294 - Enforce JSR-310 type mapping to java.util.Date.

After considering JSR-310 types to be simple we map these types primarily to java.util.Date as the majority of stores does not natively support JSR-310 types. Converters referencing JSR-310 types are now properly annotated with Reading/WritingConverter annotations to distinguish between reading and writing intents.

Othwerise, converters between JSR-310/java.util types and Joda/ThreeTenBackport to JSR-310 types interfere with conversion as regular java.util.Date types would convert to e.g. LocalDateTime.

src/main/java/org/springframework/data/convert/JodaTimeConverters.java

@@ -38,6 +38,7 @@ import org.springframework.util.ClassUtils;
  * @author Oliver Gierke
  * @author Christoph Strobl
  * @author Jens Schauder
+ * @author Mark Paluch
  */
 public abstract class JodaTimeConverters {
 
@@ -74,6 +75,7 @@ public abstract class JodaTimeConverters {
 		return converters;
 	}
 
+	@ReadingConverter
 	public enum LocalDateTimeToJsr310Converter implements Converter<LocalDateTime, java.time.LocalDateTime> {
 
 		INSTANCE;
@@ -151,6 +153,7 @@ public abstract class JodaTimeConverters {
 		}
 	}
 
+	@ReadingConverter
 	public enum LocalDateTimeToJodaLocalDateTime implements Converter<java.time.LocalDateTime, LocalDateTime> {
 
 		INSTANCE;

src/main/java/org/springframework/data/convert/Jsr310Converters.java

@@ -45,6 +45,7 @@ import org.springframework.util.ClassUtils;
  * @author Barak Schoster
  * @author Christoph Strobl
  * @author Jens Schauder
+ * @author Mark Paluch
  */
 public abstract class Jsr310Converters {
 
@@ -93,6 +94,7 @@ public abstract class Jsr310Converters {
 				.contains(type);
 	}
 
+	@ReadingConverter
 	public static enum DateToLocalDateTimeConverter implements Converter<Date, LocalDateTime> {
 
 		INSTANCE;
@@ -104,6 +106,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@WritingConverter
 	public static enum LocalDateTimeToDateConverter implements Converter<LocalDateTime, Date> {
 
 		INSTANCE;
@@ -115,6 +118,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@ReadingConverter
 	public static enum DateToLocalDateConverter implements Converter<Date, LocalDate> {
 
 		INSTANCE;
@@ -126,6 +130,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@WritingConverter
 	public static enum LocalDateToDateConverter implements Converter<LocalDate, Date> {
 
 		INSTANCE;
@@ -137,6 +142,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@ReadingConverter
 	public static enum DateToLocalTimeConverter implements Converter<Date, LocalTime> {
 
 		INSTANCE;
@@ -148,6 +154,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@WritingConverter
 	public static enum LocalTimeToDateConverter implements Converter<LocalTime, Date> {
 
 		INSTANCE;
@@ -159,6 +166,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@ReadingConverter
 	public static enum DateToInstantConverter implements Converter<Date, Instant> {
 
 		INSTANCE;
@@ -170,6 +178,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@WritingConverter
 	public static enum InstantToDateConverter implements Converter<Instant, Date> {
 
 		INSTANCE;
@@ -181,6 +190,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@ReadingConverter
 	public static enum LocalDateTimeToInstantConverter implements Converter<LocalDateTime, Instant> {
 
 		INSTANCE;
@@ -192,6 +202,7 @@ public abstract class Jsr310Converters {
 		}
 	}
 
+	@ReadingConverter
 	public static enum InstantToLocalDateTimeConverter implements Converter<Instant, LocalDateTime> {
 
 		INSTANCE;

src/main/java/org/springframework/data/convert/ThreeTenBackPortConverters.java

@@ -45,6 +45,7 @@ import org.threeten.bp.ZoneOffset;
  * @author Oliver Gierke
  * @author Christoph Strobl
  * @author Jens Schauder
+ * @author Mark Paluch
  * @see <a href="http://www.threeten.org/threetenbp">http://www.threeten.org/threetenbp</a>
  * @since 1.10
  */
@@ -92,6 +93,7 @@ public abstract class ThreeTenBackPortConverters {
 				.contains(type);
 	}
 
+	@ReadingConverter
 	public static enum LocalDateTimeToJsr310LocalDateTimeConverter
 			implements Converter<LocalDateTime, java.time.LocalDateTime> {