use TimeZoneCache

Author: Neenu1995

java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryTypeCoercionUtility.java

@@ -34,7 +34,6 @@
 import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.ChronoUnit;
-import java.util.TimeZone;
 import java.util.concurrent.TimeUnit;
 import org.apache.arrow.vector.PeriodDuration;
 import org.apache.arrow.vector.util.Text;
@@ -116,7 +115,7 @@ class BigQueryTypeCoercionUtility {
                   // Custom conversion is used to preserve sub-second (millisecond) precision,
                   // as standard java.sql.Time.toLocalTime() truncates milliseconds.
                   long millis = time.getTime();
-                  long localMillis = millis + TimeZone.getDefault().getOffset(millis);
+                  long localMillis = millis + TimeZoneCache.getOffset(millis);
                   return LocalTime.ofNanoOfDay(TimeUnit.MILLISECONDS.toNanos(localMillis));
                 },
                 Time.class,

java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/TimeZoneCache.java

@@ -30,4 +30,8 @@ public static void reset() {
   public static long getLocalMillis(long millisOfDay) {
     return millisOfDay - defaultTimeZone.getOffset(millisOfDay);
   }
+
+  public static int getOffset(long millis) {
+    return defaultTimeZone.getOffset(millis);
+  }
 }

java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryArrowResultSetTest.java

@@ -30,7 +30,6 @@
 import com.google.cloud.bigquery.Schema;
 import com.google.cloud.bigquery.StandardSQLTypeName;
 import com.google.cloud.bigquery.jdbc.rules.TimeZoneRule;
-import org.junit.jupiter.api.extension.RegisterExtension;
 import com.google.cloud.bigquery.storage.v1.ArrowRecordBatch;
 import com.google.cloud.bigquery.storage.v1.ArrowSchema;
 import com.google.common.collect.ImmutableList;
@@ -47,7 +46,6 @@
 import java.time.LocalDateTime;
 import java.time.LocalTime;
 import java.util.Arrays;
-import java.util.Calendar;
 import java.util.List;
 import java.util.TimeZone;
 import java.util.concurrent.BlockingQueue;
@@ -72,6 +70,7 @@
 import org.apache.arrow.vector.util.Text;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
@@ -429,7 +428,6 @@ public void testGetObjectWithType_failure(Object column, Class<?> type) throws S
     }
   }
 
-
   private int resultSetRowCount(BigQueryArrowResultSet resultSet) throws SQLException {
     int rowCount = 0;
     while (resultSet.next()) {

java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryJsonResultSetTest.java

@@ -51,7 +51,6 @@
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
-import java.util.Calendar;
 import java.util.TimeZone;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingDeque;
@@ -441,7 +440,6 @@ public void testIterationNested() throws SQLException {
     assertThat(bigQueryJsonResultSetNested.isAfterLast()).isTrue();
   }
 
-
   public static Stream<Arguments> successfulCoercionCases() {
     return Stream.of(
         Arguments.of("fourteenth", LocalDate.class, LocalDate.of(2020, 1, 15)),