How to pass command-line options to app using the "open" command?

I am using jedit, and since I'm doing a lot of stuff in a shell, I'd really like to launch it from the command line as though I'd opened from finder, so I wrote a script that contains this:
open -a /Applications/Jedit.app "$@" &
This works well for everything except NEW files, where I get this error:
2007-02-16 19:29:48.072 open[1032] No such file: /Users/millerti/projects/ateon/new_file
Is there a way I can override this?
So, it occurred to me that I might try running jedit directly this way:
/Applications/Jedit.app/Contents/MacOS/jedit -- "$@" &
The trouble is that this suffers all sorts of weird problems. For instance, if there's already a jedit running, it launches another one (despite the fact that -server is default). Moreover, the file it opens, existing or not, is not the one I specify. If I'm in ~/mydir and I open ./myfile, jedit opens instead /Applications/myfile.
Obviously, I'm doing something wrong. Can someone help me figure out what open is doing internally so that I can launch jedit compatible with how open does it so that I can both open existing files and create new ones the same way from the command line?
BTW, I can make more complex script.
Also, if this isn't the right forum for this, can someone tell me where would be a better place to get the question answered?
And I'm not expecting to get jedit support here. This isn't a jedit problem because it's behaving correctly.
Thanks.

Applications rarely take command line arguments. I don't know anything about Jedit, whether that is an exception, but you are not sending an argument to Jedit with the open command. The file name on your command line is an argument to the open command. The open command says "open this file with the specified application". The application doesn't see the argument. It sees the file exactly as if it were opened from the Finder. That's why naming a non-existent file doesn't work.
What if you open Jedit with no file, create a new document in the application. (Again, I am not familiar with Jedit.)

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How to pass command-line options to app using the "open" command?

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