Polishing.

Code formatting.
Adding author tags.
Added test for jdbc.
Fixed typo.

See #1744
Original pull request #1745

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/convert/QueryMapper.java

@@ -53,6 +53,7 @@ import org.springframework.util.ClassUtils;
  *
  * @author Mark Paluch
  * @author Jens Schauder
+ * @author Yan Qiang
  * @since 3.0
  */
 public class QueryMapper {

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

@@ -19,6 +19,8 @@ import static org.assertj.core.api.Assertions.*;
 import static org.mockito.Mockito.*;
 import static org.springframework.data.domain.Sort.Order.*;
 
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
@@ -26,6 +28,7 @@ import java.util.Objects;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
+import org.springframework.core.convert.converter.Converter;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jdbc.core.mapping.JdbcMappingContext;
 import org.springframework.data.relational.core.mapping.Column;
@@ -52,6 +55,16 @@ public class QueryMapperUnitTests {
 	QueryMapper mapper = new QueryMapper(converter);
 	MapSqlParameterSource parameterSource = new MapSqlParameterSource();
 
+	QueryMapper createMapper(Converter<?, ?>... converters) {
+
+		JdbcCustomConversions conversions = new JdbcCustomConversions(Arrays.asList(converters));
+
+		JdbcConverter converter = new MappingJdbcConverter(context, mock(RelationResolver.class), conversions,
+				mock(JdbcTypeFactory.class));
+
+		return new QueryMapper(converter);
+	}
+
 	@Test // DATAJDBC-318
 	public void shouldNotMapEmptyCriteria() {
 
@@ -308,6 +321,18 @@ public class QueryMapperUnitTests {
 		assertThat(condition).hasToString("person.\"NAME\" NOT IN (?[:name], ?[:name1], ?[:name2])");
 	}
 
+	@Test
+	void shouldMapIsNotInWithCollectionToStringConverter() {
+
+		mapper = createMapper(CollectionToStringConverter.INSTANCE);
+
+		Criteria criteria = Criteria.where("name").notIn("a", "b", "c");
+
+		Condition bindings = map(criteria);
+
+		assertThat(bindings).hasToString("person.\"NAME\" NOT IN (?[:name], ?[:name1], ?[:name2])");
+	}
+
 	@Test // DATAJDBC-318
 	public void shouldMapIsGt() {
 
@@ -415,7 +440,7 @@ public class QueryMapperUnitTests {
 
 		assertThatThrownBy(
 				() -> mapper.getMappedSort(Table.create("tbl"), sort, context.getRequiredPersistentEntity(Person.class)))
-						.isInstanceOf(IllegalArgumentException.class);
+				.isInstanceOf(IllegalArgumentException.class);
 	}
 
 	@Test // GH-1507
@@ -429,7 +454,7 @@ public class QueryMapperUnitTests {
 
 		assertThat(fields) //
 				.extracting(Objects::toString) //
-				.containsExactly( unsafeExpression + " ASC");
+				.containsExactly(unsafeExpression + " ASC");
 	}
 
 	private Condition map(Criteria criteria) {
@@ -443,4 +468,13 @@ public class QueryMapperUnitTests {
 		String name;
 		@Column("another_name") String alternative;
 	}
+
+	enum CollectionToStringConverter implements Converter<Collection<?>, String> {
+		INSTANCE;
+
+		@Override
+		public String convert(Collection<?> source) {
+			return source.toString();
+		}
+	}
 }

spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/query/QueryMapper.java

@@ -58,6 +58,7 @@ import org.springframework.util.ClassUtils;
  * @author Roman Chigvintsev
  * @author Manousos Mathioudakis
  * @author Jens Schauder
+ * @author Yan Qiang
  */
 public class QueryMapper {
 
@@ -142,15 +143,13 @@ public class QueryMapper {
 			SqlSort.validate(order);
 
 			OrderByField simpleOrderByField = createSimpleOrderByField(table, entity, order);
-			OrderByField orderBy = simpleOrderByField
-					.withNullHandling(order.getNullHandling());
+			OrderByField orderBy = simpleOrderByField.withNullHandling(order.getNullHandling());
 			mappedOrder.add(order.isAscending() ? orderBy.asc() : orderBy.desc());
 		}
 
 		return mappedOrder;
 	}
 
-
 	private OrderByField createSimpleOrderByField(Table table, RelationalPersistentEntity<?> entity, Sort.Order order) {
 
 		if (order instanceof SqlSort.SqlOrder sqlOrder && sqlOrder.isUnsafe()) {
@@ -364,7 +363,7 @@ public class QueryMapper {
 		Class<?> typeHint;
 
 		Comparator comparator = criteria.getComparator();
-		if (criteria.getValue()instanceof Parameter parameter) {
+		if (criteria.getValue() instanceof Parameter parameter) {
 
 			mappedValue = convertValue(comparator, parameter.getValue(), propertyField.getTypeHint());
 			typeHint = getTypeHint(mappedValue, actualType.getType(), parameter);
@@ -411,7 +410,8 @@ public class QueryMapper {
 	@Nullable
 	private Object convertValue(Comparator comparator, @Nullable Object value, TypeInformation<?> typeHint) {
 
-		if ((Comparator.IN.equals(comparator) || Comparator.NOT_IN.equals(comparator)) && value instanceof Collection<?> collection && !collection.isEmpty()) {
+		if ((Comparator.IN.equals(comparator) || Comparator.NOT_IN.equals(comparator))
+				&& value instanceof Collection<?> collection && !collection.isEmpty()) {
 
 			Collection<Object> mapped = new ArrayList<>(collection.size());
 

spring-data-r2dbc/src/test/java/org/springframework/data/r2dbc/query/QueryMapperUnitTests.java

@@ -19,7 +19,11 @@ import static org.assertj.core.api.Assertions.*;
 import static org.mockito.Mockito.*;
 import static org.springframework.data.domain.Sort.Order.*;
 
-import java.util.*;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.core.convert.converter.Converter;
@@ -50,6 +54,7 @@ import org.testcontainers.shaded.com.fasterxml.jackson.databind.node.TextNode;
  * @author Mark Paluch
  * @author Mingyuan Wu
  * @author Jens Schauder
+ * @author Yan Qiang
  */
 class QueryMapperUnitTests {
 
@@ -61,6 +66,7 @@ class QueryMapperUnitTests {
 	}
 
 	QueryMapper createMapper(R2dbcDialect dialect, Converter<?, ?>... converters) {
+
 		R2dbcCustomConversions conversions = R2dbcCustomConversions.of(dialect, Arrays.asList(converters));
 
 		R2dbcMappingContext context = new R2dbcMappingContext();
@@ -359,9 +365,10 @@ class QueryMapperUnitTests {
 	}
 
 	@Test
-	void sholdMapIsNotInWithCollectionToStringConverter() {
+	void shouldMapIsNotInWithCollectionToStringConverter() {
 
-		mapper = createMapper(PostgresDialect.INSTANCE, JsonNodeToStringConverter.INSTANCE, StringToJsonNodeConverter.INSTANCE, CollectionToStringConverter.INSTANCE);
+		mapper = createMapper(PostgresDialect.INSTANCE, JsonNodeToStringConverter.INSTANCE,
+				StringToJsonNodeConverter.INSTANCE, CollectionToStringConverter.INSTANCE);
 
 		Criteria criteria = Criteria.where("name").notIn("a", "b", "c");
 
@@ -479,14 +486,14 @@ class QueryMapperUnitTests {
 				.containsExactly("tbl.x(._)x DESC");
 	}
 
-
 	@Test // GH-1507
 	public void shouldNotMapSortWithIllegalExpression() {
 
 		Sort sort = Sort.by(desc("unknown Field"));
 
 		assertThatThrownBy(() -> mapper.getMappedSort(Table.create("tbl"), sort,
-				mapper.getMappingContext().getRequiredPersistentEntity(Person.class))).isInstanceOf(IllegalArgumentException.class);
+				mapper.getMappingContext().getRequiredPersistentEntity(Person.class)))
+				.isInstanceOf(IllegalArgumentException.class);
 	}
 
 	@Test // gh-369
@@ -588,13 +595,13 @@ class QueryMapperUnitTests {
 
 	enum CollectionToStringConverter implements Converter<Collection<?>, String> {
 		INSTANCE;
+
 		@Override
 		public String convert(Collection<?> source) {
 			return source.toString();
 		}
 	}
 
-
 	enum StringToJsonNodeConverter implements Converter<String, JsonNode> {
 		INSTANCE;