Larry pretty much has it right. The DataSource concept was introduced when we started to think about lining up the I/O design more with JDBC, and allowing for data stores with more than one dataset in them. Ultimately I think we abandoned this direction, and moved on with DataStores instead. I think we introduced a new DataStore concept because we were worried that we would break DataSource if we went back and tried to change it,
Really this whole framework should be rationalized a bit better. Perhaps DataSource should be absorbed into DataStore? The concept of Readers and Writers is still valid, though, I think - they are the "nuts and bolts" of actually reading/writing a particular format. How they are exposed to JUMP can vary, however. Larry Becker wrote: > Christopher, > > I can only repeat what is in the developer's guide, which I'm sure > you have already seen: > > "A DataSource is an object that mediates to move data between the > Workbench and a file or > other data source; it will replace the Readers/Writers found in > earlier versions of JUMP. > Similarly, DataSourceQueryChooser replaces the now-deprecated Driver. > These are the UI > panels associated with a DataSource. Note: Reader and Writer are have > not been > deprecated in JUMP 1.1, because there is no plan to re-write the > existing Readers/Writers > in the near future." > > It would appear that this was an idea that was evolving when the JUMP > project was suspended. > > regards, > Larry Becker > > On Mon, Jun 9, 2008 at 9:48 AM, Christopher <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > That seems to be the way most of the data input output > is done. I'm just wondering why the whole datasource > bit came about if it only winds up being a wrapper for > JUMPReader & JUMPWriter. > > Thank you for the feedback, > --Christopher > > --- Paul Austin <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > > Christopher, > > > > The easiest way is to use the > > > com.vividsolutions.jump.io.datasource.StandardReaderWriterDataSource > > to > > just wrap a JUMp Reader and Jump Writer. > > > > If you then register it using > > InstallStandardDataSourceQueryChoosersPlugIn it will > > show up in the > > Open/Save dialogs. > > > > Paul > > > > > > > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > <mailto:Jump-pilot-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > > > -- > http://amusingprogrammer.blogspot.com/ > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > ------------------------------------------------------------------------ > > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > -- Martin Davis Senior Technical Architect Refractions Research, Inc. (250) 383-3022 ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
