oracle jdbc driver reports no primary key columns on a table that has a primary key - oracle

Question

This was reported by HibernateTools Reverse Engineering, but it seems to be true.
oracle jdbc driver reports no primary key columns on a table that has a primary key.
#Test
public void checkTable() throws SQLException, IOException {
System.out.println("in check table");
assertNotNull(conn);
Statement s = conn.createStatement();
ResultSet rset = s.executeQuery("select user from dual");
rset.next();
String username = rset.getString(1);
rset.close();
try {
s.execute("drop table " + username + ".x");
} catch (Exception e) {
// nothing it might not exist
}
s.execute("create table " + username + ".x (y number)");
s.execute("alter table x add constraint x_pk primary key (y)");
DatabaseMetaData meta = conn.getMetaData();
final String[] tableTypes = new String[] { "TABLE", "VIEW" };
ResultSet rs = meta.getTables(null, username, "X",tableTypes);
rs.next();
String table = rs.getString("table_name");
System.out.println("table is " + table);
rs.close();
rs = s.executeQuery("select * from user_constraints where table_name = 'X'");
rs.next();
String type = rs.getString("constraint_type");
assertEquals("P",type); // primary key
rs.close();
rs = meta.getPrimaryKeys(null, username, "X");
rs.next();
logger.info("getting pk");
System.out.print("wtf");
int colCount = 0;
while (rs.next()) {
final String pkName = rs.getString("pk_name");
logger.info("pkName: {}", pkName);
int keySeq = rs.getShort("key_seq"); // TODO should probably be column seq
String columnName = rs.getString("column_name");
logger.warn("seq: {}, columnName: {}, keySeq, columnName");
colCount++;
}
System.out.println("colCount: " + colCount);
assertEquals(1,colCount);
}