Hi, Gesendet: Mi, 03. Mrz 2010 Von: Johannes Koch<johannes.k...@fit.fraunhofer.de>
> Hi, > > I wonder what the intended relation between the COS and the PD model is. > > Is the COS model the actual data model and the PD classes are only views > on this data? AFAIU yes > Is the PD layer supposed to cache data (for performance issues)? There may be some cases where data will be cached, but it wasn't intended. > If data is changed via methods in the PD layer, how are these changes > propagated to other PD objects? Do we need an observer mechanism for > data changes? I don't think so. Data changes should be writen to the COS model by the PD layer. At [1] you will find a brief description of the relation between the COS and the PD model. BR Andreas Lehmkühler [1] http://pdfbox.apache.org/userguide/index.html
