public SqlRexConvertlet get(SqlCall call) {
SqlRexConvertlet convertlet;
final SqlOperator op = call.getOperator();
// Is there a convertlet for this operator
// (e.g. SqlStdOperatorTable.plusOperator)?
convertlet = (SqlRexConvertlet) map.get(op);
if (convertlet != null) {
return convertlet;
}
// Is there a convertlet for this class of operator
// (e.g. SqlBinaryOperator)?
Class<? extends Object> clazz = op.getClass();
while (clazz != null) {
convertlet = (SqlRexConvertlet) map.get(clazz);
if (convertlet != null) {
return convertlet;
}
clazz = clazz.getSuperclass();
}
// Is there a convertlet for this class of expression
// (e.g. SqlCall)?
clazz = call.getClass();
while (clazz != null) {
convertlet = (SqlRexConvertlet) map.get(clazz);
if (convertlet != null) {
return convertlet;
}
clazz = clazz.getSuperclass();
}
return null;
}
public static Connection getConnection(Connection c) throws Exception {
Connection conn = c;
if (c != null && !c.isClosed()) {
return c;
} else {
Class clazz = Class.forName("org.luciddb.jdbc.LucidDbLocalDriver");
LucidDbLocalDriver driver = (LucidDbLocalDriver) clazz.newInstance();
String urlPrefix = driver.getUrlPrefix();
Properties props = new Properties();
props.setProperty("user", "sa");
props.setProperty("password", "");
props.setProperty("requireExistingEngine", "true");
c = DriverManager.getConnection(urlPrefix, props);
}
return c;
}
public <T> T unwrap(Class<T> clazz) {
if (clazz.isInstance(this)) {
return clazz.cast(this);
}
return parent.unwrap(clazz);
}