Hi Roger, On Mar 2, 2015, at 8:42 AM, Roger Martin <[email protected]> wrote:
> Hi, > > When writing a generic interface what is a good mechanism to identify an > object as an Image, a Lite, a Table or Packet Table? > Objects created by the Lite, Table and Packet Table interfaces do not differ from the HDF5 objects created by the low level HDF5 interfaces. Lite interface allow to create/write/read datasets and attributes of atomic datatypes with less HDF5 functions calls. Table APIs facilitate creation and access to the HDF5 datasets with compound datatypes, while Packet Table API focus on appending data to the datasets. Image and Palette are the only HDF5 objects that do have some specific characteristics defined by the HDF5 Image specification ( see http://www.hdfgroup.org/HDF5/doc/ADGuide/ImageSpec.html). Two of the H5IM functions H5IMis_image (http://www.hdfgroup.org/HDF5/doc/HL/RM_H5IM.html#H5IMis_image) and H5IMis_palette (http://www.hdfgroup.org/HDF5/doc/HL/RM_H5IM.html#H5IMis_palette) verify that an HDF5 dataset satisfies HDF5 image or palette specification. > The HDFView looks like it goes by low level and the properties describe them > as datasets. > Yes, this is correct. > Is there a good combination of H5T interfaces(and others) to determine the > above? > Lite, Table, and Image have “info” functions to find the properties that can be set by those interfaces (dimension sizes and datatypes). For Packet Table, one has to use H5T functions to get information about datatypes. > I see Packet Table has an isvalid but that is available only after opening a > Packet table > H5PTis_valid just checks that identifier is valid and it can be passed to other Packet Table functions. It is not like H5IMis_image that checks against Image spec. Did I answer your questions? Elena ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Elena Pourmal The HDF Group http://hdfgroup.org 1800 So. Oak St., Suite 203, Champaign IL 61820 217.531.6112 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > _______________________________________________ > Hdf-forum is for HDF software users discussion. > [email protected] > http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > Twitter: https://twitter.com/hdf5 _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
