[FLINK-39252][sqlserver] fix: replace Java 9+ APIs with Java 8 compatible code in SQL Server connector

Author: Daishuyuan

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-sqlserver/src/main/java/org/apache/flink/cdc/connectors/sqlserver/factory/SqlServerDataSourceFactory.java

@@ -49,7 +49,6 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.Properties;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -274,7 +273,9 @@ public String identifier() {
 
     private static List<String> getTableList(
             @Nullable List<TableId> tableIdList, Selectors selectors) {
-        return Objects.requireNonNullElse(tableIdList, Collections.<TableId>emptyList()).stream()
+        List<TableId> resolvedTableIdList =
+                tableIdList == null ? Collections.emptyList() : tableIdList;
+        return resolvedTableIdList.stream()
                 .filter(selectors::isMatch)
                 // SQL Server tableList format: schemaName.tableName (without database prefix)
                 // See SqlServerSourceBuilder: "Each identifier is of the form

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-sqlserver/src/test/java/org/apache/flink/cdc/connectors/sqlserver/source/SqlServerOnlineSchemaMigrationITCase.java

@@ -53,7 +53,6 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
-import java.util.Map;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -187,7 +186,7 @@ void testSchemaMigrationFromScratch() throws Exception {
                         new AlterColumnTypeEvent(
                                 tableId,
                                 Collections.singletonMap("ext", DataTypes.DOUBLE()),
-                                Map.of("ext", DataTypes.INT())),
+                                Collections.singletonMap("ext", DataTypes.INT())),
                         DataChangeEvent.insertEvent(
                                 tableId,
                                 generate(