[andreware]

In application I'm working on I need to store several data files. These data files should be unpacked on first start and them periodically updated from web.

I'm developing for Storm (9500, 9530). I expected to have private directory for application. As I understand "fileconn.dir.private" is not supported by System.getProperty() on BlackBerry.

Is there application private directory at all and how to find path to it?
Or where should I store application data files?

[hippocamp software]

use a persistentstore class: RIM Device Java Library: Class PersistentStore

[andreware]

I considered PersistentStore, but I don't want to use it for two reasons:

• As I understand it is designed as a way to serialize/deserialize objects to/from device. Thats not exactly where my needs are. These data files fall into several objects of different classes when data is read.
• More important that I'm porting this functionality from Android version of application and want to keep architecture of both projects as close as possible.

Anyway thanks for spending your time on my problem.

[Dougsg38p]

Did you look at FileConnection?

It is in the API docs.

[andreware]

Yes, I'm using FileConnection to work with files (retrieve input and output streams, check file existence, create/delete directories and files).

I need to know where should I store private files. For example, on Android each application has private directory where it is recommended to store data files and there is API method that returns path to this directory. Is there something similar on Blackberry?

[hrbuckley]

Never come across any such directory. PersistentStore is the way to go, if you want to stay close to file semantics save them as a Hash of Strings with Strings as the key.

[Sparkletron]

Originally Posted by hrbuckley

PersistentStore is the way to go

PersistentStore seems appropriate for long-term persistence. But what if you just want to save temporary files? I see that System.getProperty("java.io.tmpdir") returns null. And there's no File.createTempFile() method. PersistentStore could still be used for this but is it the best practice?

[hrbuckley]

It depends. It is a compromise between work to encode/decode objects and memory and object handles available for the stores.

[shraddha294]

Originally Posted by andreware

I need to know where should I store private files. For example, on Android each application has private directory where it is recommended to store data files and there is API method that returns path to this directory. Is there something similar on Blackberry?

unlike Android, no private directory. I had a similar issue and we created our own directory structure and stored data in encrypted form to disallow other applications from using the data. Depending on size of data you may decide between persistent store and file connection.
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