Can a PL/PgSQL function return a cursor?

I have not had any luck getting a PL/PgSQL function that returns a
cursor to compile. I've tried writing this in several forms, for
instance;

CREATE FUNCTION getcursor()
RETURNS cursor
AS
'BEGIN
DECLARE testcursor CURSOR FOR
SELECT * FROM test_table;
RETURN testcursor;
END;'
LANGUAGE 'plpgsql';

but the parser always complains:

ERROR: parser: parse error at or near "cursor"

I assume this means that cursor is not a valid return type for PL/PgSQL
functions? The point of this is to map queries that return large
results sets to cursors for use in Java (through the ResultSet type).

I'm using 7.0.3 on Red Hat 7.0.

Jeff

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