Fix Enum[] type conversion.

Since 3.0.5, Enum[] type are detect as "UNKNOWN"

Closes #1460
Original Pull request #1521

Author: vgalloy

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateIntegrationTests.java

@@ -1082,6 +1082,16 @@ void insertOnlyPropertyDoesNotGetUpdated() {
 		assertThat(template.findById(entity.id, WithInsertOnly.class).insertOnly).isEqualTo("first value");
 	}
 
+	@Test // GH-1460
+	void readEnumArray() {
+		EnumArrayOwner entity = new EnumArrayOwner();
+		entity.digits = new Color[]{Color.BLUE};
+
+		assertThat(template.save(entity)).isNotNull();
+
+		assertThat(template.findById(entity.id, EnumArrayOwner.class).digits).isEqualTo(new Color[]{Color.BLUE});
+	}
+
 	private <T extends Number> void saveAndUpdateAggregateWithVersion(VersionedAggregate aggregate,
 			Function<Number, T> toConcreteNumber) {
 		saveAndUpdateAggregateWithVersion(aggregate, toConcreteNumber, 0);
@@ -1123,6 +1133,17 @@ private Long count(String tableName) {
 		return jdbcTemplate.queryForObject("SELECT COUNT(*) FROM " + tableName, emptyMap(), Long.class);
 	}
 
+	enum Color {
+		BLUE
+	}
+
+	@Table("ARRAY_OWNER")
+	private static class EnumArrayOwner {
+		@Id Long id;
+
+		Color[] digits;
+	}
+
 	@Table("ARRAY_OWNER")
 	private static class ArrayOwner {
 		@Id Long id;

spring-data-relational/src/main/java/org/springframework/data/relational/core/conversion/BasicRelationalConverter.java

@@ -176,7 +176,7 @@ public Object writeValue(@Nullable Object value, TypeInformation<?> type) {
 
 		// TODO: We should add conversion support for arrays, however,
 		// these should consider multi-dimensional arrays as well.
-		if (value.getClass().isArray() && (TypeInformation.OBJECT.equals(type) || type.isCollectionLike())) {
+		if (value.getClass().isArray() && !value.getClass().getComponentType().isEnum() && (TypeInformation.OBJECT.equals(type) || type.isCollectionLike())) {
 			return value;
 		}