Fix JDK8 compilation errors introduced by cherry-picking #1363. (#1817)

Closes #1816.

Author: mikereiche

src/main/java/com/querydsl/couchbase/document/CouchbaseDocumentSerializer.java

@@ -15,6 +15,9 @@
  */
 package com.querydsl.couchbase.document;
 
+import static com.querydsl.core.types.OrderSpecifier.NullHandling.NullsFirst;
+import static com.querydsl.core.types.OrderSpecifier.NullHandling.NullsLast;
+
 import java.util.Collection;
 import java.util.List;
 import java.util.regex.Pattern;
@@ -31,6 +34,7 @@
 import com.querydsl.core.types.Operation;
 import com.querydsl.core.types.Operator;
 import com.querydsl.core.types.Ops;
+import com.querydsl.core.types.Order;
 import com.querydsl.core.types.OrderSpecifier;
 import com.querydsl.core.types.ParamExpression;
 import com.querydsl.core.types.Path;
@@ -39,7 +43,6 @@
 import com.querydsl.core.types.SubQueryExpression;
 import com.querydsl.core.types.TemplateExpression;
 import com.querydsl.core.types.Visitor;
-import com.querydsl.core.types.Order;
 
 /**
  * Serializes the given Querydsl query to a Document query for Couchbase.
@@ -58,11 +61,8 @@ public Sort toSort(List<OrderSpecifier<?>> orderBys) {
 		for (OrderSpecifier<?> orderBy : orderBys) {
 			Object key = orderBy.getTarget().accept(this, null);
 			String keyAsString = key.toString();
-			Sort.NullHandling sortNullHandling = switch (orderBy.getNullHandling()) {
-				case NullsFirst -> Sort.NullHandling.NULLS_FIRST;
-				case NullsLast -> Sort.NullHandling.NULLS_LAST;
-				default -> Sort.NullHandling.NATIVE;
-			};
+			Sort.NullHandling sortNullHandling = orderBy.getNullHandling() == NullsFirst ? Sort.NullHandling.NULLS_FIRST
+					: orderBy.getNullHandling() == NullsLast ? Sort.NullHandling.NULLS_LAST : Sort.NullHandling.NATIVE;
 			Sort.Direction sortDirection = orderBy.getOrder() == Order.ASC ? Sort.Direction.ASC : Sort.Direction.DESC;
 			Sort.Order sortOrder = new Sort.Order(sortDirection, keyAsString, sortNullHandling);
 			sort = sort.and(Sort.by(sortOrder));

src/test/java/org/springframework/data/couchbase/repository/query/CouchbaseRepositoryQuerydslIntegrationTests.java

@@ -25,8 +25,10 @@
 
 import java.util.Arrays;
 import java.util.Comparator;
+import java.util.List;
 import java.util.Locale;
 import java.util.Optional;
+import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;
 
 import org.junit.jupiter.api.AfterAll;
@@ -419,7 +421,7 @@ void testIn() {
 	@Test
 	void testSort(){
 		{
-			BooleanExpression predicate = airline.name.in(Arrays.stream(saved).map(Airline::getName).toList());
+			BooleanExpression predicate = airline.name.in((Arrays.stream(saved).map(Airline::getName)).collect(Collectors.toList()));
 			Iterable<Airline> result = airlineRepository.findAll(predicate, Sort.by("name").ascending());
 			assertArrayEquals(StreamSupport.stream(result.spliterator(), false).toArray(Airline[]::new),
 							Arrays.stream(saved)
@@ -429,7 +431,7 @@ void testSort(){
 		}
 
 		{
-			BooleanExpression predicate = airline.name.in(Arrays.stream(saved).map(Airline::getName).toList());
+			BooleanExpression predicate = airline.name.in((Arrays.stream(saved).map(Airline::getName)).collect(Collectors.toList()));
 			Iterable<Airline> result = airlineRepository.findAll(predicate, Sort.by("name").descending());
 			assertArrayEquals(StreamSupport.stream(result.spliterator(), false).toArray(Airline[]::new),
 							Arrays.stream(saved)
@@ -439,7 +441,7 @@ void testSort(){
 		}
 
 		{
-			BooleanExpression predicate = airline.name.in(Arrays.stream(saved).map(Airline::getName).toList());
+			BooleanExpression predicate = airline.name.in((Arrays.stream(saved).map(Airline::getName)).collect(Collectors.toList()));
 			Iterable<Airline> result = airlineRepository.findAll(predicate, airline.name.asc());
 			assertArrayEquals(StreamSupport.stream(result.spliterator(), false).toArray(Airline[]::new),
 							Arrays.stream(saved)
@@ -449,7 +451,7 @@ void testSort(){
 		}
 
 		{
-			BooleanExpression predicate = airline.name.in(Arrays.stream(saved).map(Airline::getName).toList());
+			BooleanExpression predicate = airline.name.in((Arrays.stream(saved).map(Airline::getName)).collect(Collectors.toList()));
 			Iterable<Airline> result = airlineRepository.findAll(predicate, airline.name.desc());
 			assertArrayEquals(StreamSupport.stream(result.spliterator(), false).toArray(Airline[]::new),
 							Arrays.stream(saved)