+3
Anyway, you might have understand the question by now.
Is it not possible to test for empty strings in the NullValueMapper?
NullValueMapper is enticing me to use it to find a way to update Parameters, but it only tests for values or "Null/Empty/Missing"..but not "NOT Null/Empty/Missing".
Can i assume this not possible then?
+17
And, the Tester may be the easiest way to check if an attribute is not empty/null/missing. The != operator interprets both <null> and <missing> attribute to an empty string when comparing the operands.
attr != <leave blank the Right Value column>
+3
As this transformer let's you choose one in the "selected Attributes" when the Map is set to "selected Attributes".
I was surprised so i had to try, but it does not appear to want to update any parameter you choose.
No matter what regexp you try.
If you choose a attribute, it works, but that was not what i was asking.
So i wonder why is there an option to choose a Parameter to map?
+17
+3
but as one can choose "parameter" in the "selected Attributes" when the Map is set to "selected Attributes" , i was qurious if it might be possible after all.
So again:why is there an option to choose a Parameter to map?
+17
I cannot answer to your question straight, but I know a usage of Parameter for the Selected Attributes. That is, to get "attribute list" through a published parameter in a custom transformer.
As far as I know, that's the only usage.
Try creating a published parameter in a custom transformer definition.
+3
But i don't think it is logical to place it in a Mapping section. In the AttrList use it is more a parameter in wich is searched, and if found a attribute is subsequently mapped. Not a parameter.
It should be under "parameter to search in" or "mappingparameter" and not under attributes to match.
+17
These transformers will manipulate attribute values through attribute names specified by the parameter, and also the parameter can be set to a user parameter.
Comparing to these transformers, I cannot find something conceptually special in the NullAttributeMapper...
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