There seems to be an inconsistency in the JOLT Transform Processors, but maybe I'm just missing something, and hopefully someone can shed some light on my confusion.
Below is a really simple JSON dataset and an equally simple JOLT transform, which works as expected on the Jolt-Transform-Demo site (https://jolt-demo.appspot.com/).
Incoming JSON:
{
"loaf1": {
"type": "white"
},
"loaf2": {
"type": "wheat"
}
}
JOLT spec:
[{
"operation": "shift",
"spec": {
"*": "bread.&"
}
}]
As you can see I've declared the operation as a "shift", and there is only a single "spec".
When using the JoltTransformJSON processor, I set the Jolt Transformation DSL = "shift", then the specification fails to validate. Why?
However, if I remove the square braces "[ ]" from the spec then the specification will successfully validate. However, it doesn't properly transform the data, and return "null". Why?
But...
If I leave the square braces in the spec, but change the Jolt Transformation DSL = "chain" then the validation works and it correctly transforms the data. Why does this need to be set to "chain" when there is only a single spec in the specification?
I appreciate any insight into the behavior of the JOLT processors.
