J2ME / Databases / Xml Parsing

Question

Hi,
I am looking for the best way to use a file as database in an MIDP Application :
I tried to use a CSV File and now i am trying to use an XML File. I use the kXml2 parser.
In both cases, access times are not very acceptable
I wonder whether it depends on the way i am reading files .
i use the following command to access to my file : InputStream in = getClass().getResourceAsStream("/"+filename);
For the CSV File, i use in.read() which enable me to read char by char (maybe it's not the best way ?)
For the XML File, i use a KXmlParser Object with an InputStreamReader. KXmlParser.setInput(InputStreamReader.)
Have you any idea / remark / other thing that can help me in my research.
I d like to improve theses access time...
Thanks a lot,
Edited by: t00f on Mar 6, 2008 2:27 AM

Answer 1

First how "big" are you records, remember that your application is probably going to run on mobile phones, most of them now have external memory sticks but still most of them have limited build in memory from which you can use.
To use the File Connection API your device must support JSR 75 , which means that your device will probably take external memory or even have a small hard drive.
If your records are small enough , the record store mechanism would suit your needs, else try the File Connection API.
For the File Connection API you use the Generic Connection Framework (GCF) , the same framework you 'll use to make a socket or HTTP connection with your MIDlet. After you established the connection with the device file system, you read and write through the input and output stream classes from the java.io package.
If you have any experience with socket programming its the same concept here.
Regards
Andreas Michaelides