private synchronized void init() throws SQLException {
if (isClosed) return;
// do tables exists?
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(TABLE_NAMES_SELECT_STMT);
ArrayList<String> missingTables = new ArrayList(TABLES.keySet());
while (rs.next()) {
String tableName = rs.getString("name");
missingTables.remove(tableName);
}
for (String missingTable : missingTables) {
try {
Statement createStmt = conn.createStatement();
// System.out.println("Adding table "+ missingTable);
createStmt.executeUpdate(TABLES.get(missingTable));
createStmt.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
}
}
}
public boolean delete(String table, String deleteString) {
Statement stmt = null;
try {
stmt = conn.createStatement();
stmt.executeUpdate("delete from " + table + " where " + deleteString + ";");
return true;
} catch (SQLException sqe) {
sqe.printStackTrace();
return false;
} finally {
if (stmt != null)
try {
stmt.close();
} catch (SQLException sqe2) {
sqe2.printStackTrace();
}
}
}
public boolean delete() {
Statement stmt = null;
try {
stmt = conn.createStatement();
stmt.executeUpdate(deleteStatement());
return true;
} catch (SQLException sqe) {
System.err.println(deleteStatement());
sqe.printStackTrace();
return false;
} finally {
if (stmt != null)
try {
stmt.close();
} catch (SQLException sqe2) {
sqe2.printStackTrace();
}
}
}