JdbcTemplate: add queryOne method

2021-01-03 16:07:40 +03:00
parent c963c4bd60
commit f821691308
3 changed files with 26 additions and 0 deletions
--- a/src/main/java/ghast/database/JdbcTemplate.java
+++ b/src/main/java/ghast/database/JdbcTemplate.java
@@ -59,6 +59,17 @@ public class JdbcTemplate implements JdbcOperations {
 		}
 	}

+	@Override
+	public <T> Optional<T> queryOne(String sql, ResultSetExtractor<T> rse) throws DataAccessException {
+		return query(sql, rs -> {
+			if (rs.next()) {
+				return Optional.ofNullable(rse.extractData(rs));
+			} else {
+				return Optional.empty();
+			}
+		});
+	}
+
 	@Override
 	public <T> List<T> queryList(String sql, final RowMapper<T> rowMapper) throws DataAccessException {
 		return query(sql, rs -> {