Is it appropriate to use File.createTempFile() in webstart applications?

Hello everyone.
I'm currently involved in developing a web start application for my company; and I am a bit puzzled as to the way temporary storage should be managed in the client's machine. To begin with, the application is a web start "trusted" application, since we're signing it.
Specifically, the application needs to perform XSLT transformations with user-generated data. This obviously needs some place to read a source XML document and a source XML stylesheet.
Loading the latter from my application jars as a URL isn't much of a problem. However, my confusion is regarding the location where the XML document generated by the user should be temporarily stored, since only the output of the transform is relevant.
So the first option I got is to use the muffin storage system provided by web start. The concern I have with this is that, while it does provide a place for applications to store data, the mechanics needed to maintain muffin data do not seem (this is just a personal opinion) friendly enough for storing temporary data (an XML file in my case).
Now, I find that a better alternative for doing this would be to use File.createTempFile() in order to request a temporary storage location to dump the XML data to transform.
Now, bearing this in mind; is it ok for this trusted application to use the facility provided by the File class? Or is there any better way I could do this?
Thanks for your time and help!

jzazueta wrote:
Well, basically the intent is that the result of the transform will be used to derive a report from another application. Now, the nature of the transform's output file is about 3 to 4 MB when generated.
I believe that is the primary purpose of saving transformed output.Fair enough but then why do you need to create the intermediate temporary file. Can't you just process the transformed data sequentially as it is produced.
>
In fact, while looking further into this subject, I found some code from the JDIC project mailing list where the example seems to indicate that some level of File functionality is allowed while running under Webstart.I use files under Webstart but I do sign the jars.
>
[http://markmail.org/message/vhjdnwqwjdyvwliv?q=createTempFile+webstart]
So probably the idea may not be too crazy at all :PI never said it was crazy - I just queried the need for the intermediate file. You don't give any details of what you are doing with the transformed xml so I still question the need for the intermediate file.

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======= BEGIN CLASS "CreateTempFileBug" ================
import java.io.File;
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Is it appropriate to use File.createTempFile() in webstart applications?

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