Hi,
you're mixing up simple amd jsonpath which is not a function within simple.
Your when statement can be written as .when().jsonpath("$..books.length() == 1")
Take a look at the sample here
https://camel.apache.org/components/latest/jsonpath-language.html
BR
Maruan
> I am parsing an json and verify array length like below
>
> from("direct:parseJson")
> .setHeader("numberOfBooks").jsonpath("$..books.length()", int.class)
> .choice()
> .when( simple("${header.numberOfBooks} == '1'"))
> .log("One book")
> .otherwise()
> .log("multiple");
>
> Above Code works, but i am looking for option if we can avoid line 2 with
> below
>
> .when( simple("${jsonpath(' $..books.length() ', int.class)} == 1") )
>
> its throwing error
>
> Caused by:
> org.apache.camel.language.simple.types.SimpleIllegalSyntaxException:
> Unknown function: jsonpath(' $..books.length() ', int.class) == 1 at
> location 0
> ${jsonpath(' $..books.length() ', int.class)} == 1
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