Claus Ibsen created CAMEL-25471:
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Summary: camel-dataweave - convert real-world Mule DataWeave
scripts faithfully
Key: CAMEL-25471
URL: https://issues.apache.org/jira/browse/CAMEL-25471
Project: Camel
Issue Type: Improvement
Reporter: Claus Ibsen
Fix For: 4.23.0
Umbrella for making the DataWeave to DataSonnet converter (camel-dataweave,
used by the datasonnet language and camel transform dataweave) good enough for
migrating real Mule DataWeave 2.x scripts.
An analysis ran 233 realistic DataWeave snippets (plus 10 Mule-style scripts)
through the converter and executed the generated DataSonnet in a Camel route
against the output DataWeave produces:
* 109 correct
* 93 silently wrong: converted with no TODO, then 22 return a wrong value and
71 fail on every message at runtime
* 16 parse errors, 3 invalid DataSonnet caught at startup, 12 honest TODOs
Root causes: the parser drops trailing tokens and unknown header lines;
DataWeave 2 lambda syntax and infix precedence are not followed; DataWeave
null/selector semantics (missing field = null, selector on array = implicit
map) are not modelled; unknown functions pass through; object construction
(conditional fields, spread) and ranges are not supported.
The goal is that every DataWeave script either converts to DataSonnet that
produces the same output, or fails at conversion time - never silently wrong.
DataSonnet's built-in ds.* library (modelled on DataWeave) is used where it
matches DataWeave semantics.
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