Writing user defined SQL functions for SQLite using Java or Groovy?

Question

With SQLite, user defined SQL functions can easily be added using the C api or PHP. But is it also possible using Java or Groovy?

Answer 1

Simple way to create a function which accepts arguments and return result:

        Function.create(conn, "addNS", new Function() {
            @Override
            protected void xFunc() {
                System.out.println("myFunc called!");
                String arg1;
                try {
                    arg1 = value_text(0);
                    System.out.println("function arg1:"+arg1);
                    result("NS-"+arg1);
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        },  1, Function.FLAG_DETERMINISTIC);

        rs = conn.createStatement().executeQuery("select addNS('xyz');");
        while(rs.next()) {
            String val = rs.getString(1);
            System.out.println("Function return val : " + val);
        }