the ID should be unique within one layer.. for cloning and copying look in the code!
Sunburned Surveyor schrieb: > I'm still chipping away at my FeatureCache. I'm currently working on > the class that will write Features to a binary file that uses a > shortened format of BOFF. > (http://thejumppilotproject.pbwiki.com/Binary+Open+Feature+Format) > Part of the format stores a unique numeric identifier for the Feature, > which I will also be using in my FeatureCache internally. > > The BOFF format defines this unique numeric identifier for features as > an 8 byte long. The Feature interface provides a getID method that > returns an int. This isn't a problem, since I Java will automatically > convert the int to a long. > > However, I need to ask some questions about the getID method so that I > don't use it improperly in the guts of the FeatureCache. Is the int > returned by the getID method gauranteed to be unique within each > FeatureCollection? Can a Layer contain two Features with the same ID? > What if a Feature is cloned or copied? > > Thanks for any information on how the ID mechanism for Features works > in JUMP/OpenJUMP. > > The Sunburned Surveyor > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
