Re: how to create intelligent invoker :)

From:

Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 05 Nov 2007 11:47:00 -0800

Message-ID:

<CradnapKy43N7rLanZ2dnUVZ_vqpnZ2d@wavecable.com>

devphylosoff wrote:

hey

problem:
how invoke diffrent methods/contructors (depends on arguments number)
in one statement.

description:
I have many classes with constructors NameOfClass(int, int, int, ...,
int);

and I have method which invoke each of above class in switch block:
if (className == sth) {
NameOfClass1(int a, int b);
} else if (className == sth2) {
NameOfClass2(int a, int b, int c);
} else if ...

use ArrayList or another like solution is not acceptable.

is reflection will be helpful here ?

You might look into the Factory pattern instead. Why isn't the use of
ArrayList or another like solution not acceptable? Sounds like a fairly
artificial constraint. If className is a string, you could use
reflection, but I wouldn't recommend it.
<http://virtualinfinity.net/wordpress/program-design/2007/01/11/the-dangers-of-reflection-or-put-down-that-mirror/>

Alternatively, you could use the Factory pattern and have a Map<String,
Factory>, where Factory is your base-class/interface that has a method
which will invoke new SomeClass(whatever,args,you,want);

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>