Hi Doug:
While there are some simple UML descriptions of the CDM, the real work and
thought is in the netcdf-Java library and API. It evolves from the ground up,
as we deal with more datasets and data types.
In an ideal world, we probably would develop an interface that corresponds to a
"pure" CDM description. In the real world, theres not enough resources or
motivation to do so. Also, its still evolves, esp at the feature type APIs, and i dont
think its time yet to cast that in stone.
Can you describe some use-case in some detail? Why would a group "never adopt
NetCDF-Java" ? What is the issue there that could be solved by a lightweight API ?
John
Doug Lindholm wrote:
I still intend to focus on Java, but I want to be able to plug in a
light-weight alternative to NetCDF-Java. I have a system with a data
model implementation that is consistent with the CDM. Instead of writing
an IOSP or subclassing NetcdfFile and taking on all of NetCDF's
dependencies, I'd like to have a Java Interface that my data model could
implement. All "client" code would then write to that interface. NetCDF
and other implementations of that same interface would then be usable by
that same client.
I work with groups that will never adopt NetCDF-Java but they might
implement a simple set of Java Interfaces with their data model. This
would lower a lot of barriers to interoperability. Is the CDM moving in
this direction or is the plan to expose all other data via the
NetCDF-Java API?
Thanks,
Doug
On 3/26/10 2:15 PM, Richard Signell wrote:
Doug,
What is the state of the Common Data Model
(http://www.unidata.ucar.edu/software/netcdf-java/CDM/)? Is there a
complete
definition of the model. The UML on that page communicates the idea
well,
but I'd like to see an interface that I could program to. Right now,
I am
uncomfortably tightly coupled to the NetCDF Java implementation.
What other language are you planning to be coupled to?
Just thought others in the community might be curious besides me.
-Rich
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