JSONPath array length validation

[Imran Raza Khan <im...@gmail.com>]

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

Re: JSONPath array length validation

[Maruan Sahyoun <sa...@fileaffairs.de>]

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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