Claus Ibsen created CAMEL-25900:
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Summary: camel-jbang - AI tools: lead to the jsonpath filter with
resultType java.util.Map for the one element of a list
Key: CAMEL-25900
URL: https://issues.apache.org/jira/browse/CAMEL-25900
Project: Camel
Issue Type: Improvement
Components: camel-jbang
Reporter: Claus Ibsen
Fix For: 4.24.0
A REST example of the benchmark asks for one order out of a JSON list by its id
(GET /orders/{id}, 404 when unknown). It failed 12 of 12 times, on two nights.
The camel-jbang AI tools saw the earlier hints, but the model still wrote paths
that give the wrong answer:
* {{$[?(@.orderId == '${header.id}')][0]}}: Jayway applies an index after a
filter to each element the filter matched, so this gives an empty list (200
with []).
* {{$[?(@.orderId == '${header.id}')] && size() > 0}}: && outside the filter is
no JsonPath (500).
* {{${body[0].orderId}}}: the List hint offered [0] first, so the model took
the first element.
The recipe (a filter with resultType java.util.Map: the element when one
matches, null when none does) was in the docs, but the tools did not lead to it.
Proposal:
* The source check (camel_validate_source and the write tools) reports an index
after a filter: "an index after a filter gives an empty list in JsonPath ...
leave the index out and set resultType: java.util.Map". It also reports && or
|| outside a filter: "&& and || work inside a filter only ...; to test whether
a filter matched, set resultType: java.util.Map, and check ${body} == null in a
choice".
* camel_eval_expression of a jsonpath filter adds a note that a filter gives a
list also for one match, and that in a route resultType: java.util.Map gives
the one element.
* camel_catalog_doc jsonpath answers the recipe in usage.
* camel-bean: the hint for ${body.orderId} on a List leads with the jsonpath
recipe, and [0] comes after it.
* camel_catalog_find for a wrong header name (CamelHttpStatusCode and similar)
names the right one, CamelHttpResponseCode (Exchange.HTTP_RESPONSE_CODE).
_Claude Code on behalf of davsclaus_
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