Creating folders in a component

Question

I have this component (filter) that is being executed before a check in.
depening on the values i want to create a folder to store the document. My component allready puts the document in a correct folder if it exist but when the folder doesn't exist, it has to be created.
For example we work with invoices so i have a folder named INVOICE, i also have a folder names ORDER
I've created an extra field where people can enter the name of the customer so when we get an invoice from oracle, it has to be stored in INVOICE/Oracle
say, if the subfolder oracle doesn't exist, i have to create it first. If it allready exist, there is no problem.
Can anybody tell me how i can create a folder in java?

Answer 1

allright i just created my component and it works just fine :)
Thanks to bex's book for the documentation offcourse :)
This is what i've done:
First i looked at the services of the folder component to see if there is a service for creating a folder. I didn't really find one so i checked the IdcService field on the page for creating a folder. There i saw that it was the COLLECTION_ADD service.
THen i altered my filter. He first checkes if a folder allready exist. Therefore i created a function that holds 2 parameters: folderName and parendID. If the folder doesn't exist i return -1 so i know i have to create it.
I've created a method that calls the COLLECTION_ADD service with all the needed parameters. The method also returns the ID of the folder so i can use it to store my document.
This is my first component that really extends functionality. I'm kinda proud of it because this morning i thought it was much harder to write :)
I also noticed it isn't that hard to call the services, query the database, loop resultset,... inside a java component.
And offcourse, i couldn't do it without bex his book :)