No in fact the only thing you have is something called a record store
that is only able to record byte array. To be more precise I will need
to serialize the Column, Table, etc classes to byte arrays and then
record them into this record store (that is inside your device).
My question was: Is there any way to get a textual representation of all
the tables and columns and views in the J2SE version, i.e. is their a
file created on disk where you store all the tables when you do a
commit. And is there and export command that trigger this action.
Second point was: Is it a better idea to have the persistent class
implementing an interfage and take care of themself to backup or is it
better to have a new package that takes as an input a table an that
returns a byte array representing the table?
I hope that it's now clear where I want to go.
CU Jerome
fredt wrote:
Well done!
What do you mean by this question? If there is no file system, where do you
intend to save the tables and views?
Do you mean you want to create a database outside the J2ME environment that
contains the tables and data, then read it inside the J2ME environment?
Perhaps you should look at the files_readonly property that allows you to
package a database in a jar.
Fred
----- Original Message -----
From: "Jérôme Paschoud" <[EMAIL PROTECTED]>
To: <hsqldb-developers@lists.sourceforge.net>
Sent: 13 October 2005 14:29
Subject: [Hsqldb-developers] Persistant storage
Now that I have a micro (in fact even a nano) version of HSQLDB (around
150 Ko) that runs well on J2ME/CLDC. I'm trying to implement the
persistent storage for this version. As their is no file system on such
device, I will not have a complicate save and restore mecanism. I will
simply save all tables and views on shutdown and restore them on startup.
Could someone tell me if their exists an export like command to (guess
what) export the whole database to a file in the J2ME version.
What do you think would be the best way to achieve save and restore
mecanism:
- All classes needing backup implements an serialize like interface
- A whole new package has the mission to serilialize and save/restore
each permanent class
CU Jérôme
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