All the examples I've seen for data download have the feature types coming from one reader and use the Feature Types to Read parameter to give the user the ability to choose which feature types to download.
Based on what I've found I'm thinking I need to use a FeatureReader(s) but I couldn't find examples on how to implement it for multiple data sources. I hope that's clear and I apologize if the answer is already out there, I just couldn't find it.
Thanks,
Michael
+13
Although I have never tried it myself, my first try would be to connect all feature types to read parameters from all of your readers (or feature readers) into one general feature types to read parameter that is published to the user.
Could it be that simpel? I sure hope so :)
Itay.
Thanks for your reply.
I think I've tried what you suggest and if I understand and I'm doing it correctly, it doesn't work. I currently have four different readers set up for testing and have the Feature Types to Read parameter published on one of them (the first reader). I then added the feature types from the other three readers to first reader's Feature Types to Read parameter (the one that is published) by editing the Definition and adding to the feature types list from another dataset. I can download all the feature types but the workspace only seems to respect my choice of feature types to read from the first reader (the one with the Feature Types to Read parameter published). In other words, the other three readers I added are always downloaded, whether or not they are selected in the published Feature Types to Read parameter when the workspace is run.
My next attempt was to link the other three reader's Feature Types to Read parameter to the published parameter but then the parameter only lists the feature types from the last reader I linked to.
So, if I'm doing it correctly, it seems like a published parameter (Feature Type to Read, in this case) can only be associated with a single reader?
Thanks,
Michael
+13
What happens if you link all the feature to read parameters into one parameter and then add all the features types?
Itay
+11
You need some kind of trigger feature for each reader, which can specify details of feature types to read. You would have one FeatureReader for each potential data source that you need to read from.
If you need extra customisation of parameters of each FeatureReader source data type you can do that by adding a "Reader as a Resource". (More information on this capability can be found at: http://docs.safe.com/fme/html/FME_Workbench/Default.htm#add_reader_as_resource.htm)
Nic
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