How to call PostgreSQL function with array of rowtype as parameter from Java

Question

How to call a postgres function with array of rowtype as parameter from Java application (the application is a Spring web application)?
Of course I can refactor my function and use several arrays of primitive types, but then on application side function call will be ugly.

CREATE OR REPLACE FUNCTION process_orders
(
  order_array orders[]
)
RETURNS bigint AS
$BODY$
BEGIN
    -- bla bla bla :)
    RETURN 0;
END;
$BODY$

LANGUAGE plpgsql;

Answer 1

I expect a function-like row constructor won't work for JDBC. Use the text representation of said parameter instead.
For instance, if your table is tbl (id int, txt text):

SELECT process_orders('{"(1,txt)","(1,txt)"}')

Or (to be unambiguous in the face of overloaded functions):

SELECT process_orders('{"(1,txt)","(1,txt)"}'::tbl[])

Example with space and special character:

SELECT process_orders('"(1,txt)","(1,\"txt with space and '\")"}')

How to determine correct syntax?

Just let Postgres show you:
SQL Fiddle.