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https://issues.apache.org/jira/browse/CAMEL-7305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13938881#comment-13938881
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Claus Ibsen commented on CAMEL-7305:
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This is resolved with CAMEL-7298 which enforces using predicate when the result
type is boolean, and therefore the value is either true or false.
> Simple Language - ResultType Coercion is not consistent
> -------------------------------------------------------
>
> Key: CAMEL-7305
> URL: https://issues.apache.org/jira/browse/CAMEL-7305
> Project: Camel
> Issue Type: Bug
> Affects Versions: 2.12.3
> Reporter: Alan Foster
>
> Both of the following code snippets lead to unexpected results when setting a
> resultType to be a boolean/integer
> {code:title=Scenario - Handling POJO}
> <camelContext trace="false"
> xmlns="http://camel.apache.org/schema/blueprint";>
> <route>
> <from uri="direct:entry"/>
> <!-- Return any kind of POJO -->
> <bean ref="complexModelFactory" method="createComplexModel" />
> <setBody>
> <simple resultType="java.lang.Boolean">${body}</simple>
> </setBody>
> <log message="The body is currently :: '${body}'" />
> </route>
> </camelContext>
> {code}
> {code:title=Scenario - Handling missing header}
> <camelContext trace="false"
> xmlns="http://camel.apache.org/schema/blueprint";>
> <route>
> <from uri="direct:entry"/>
> <setBody>
> <simple
> resultType="java.lang.Boolean">${headers.missing}</simple>
> </setBody>
> <log message="The body is currently :: '${body}'" />
> </route>
> </camelContext>
> {code}
> The log for both of these scenarios is -
> {code}[ main] route1 INFO
> The body is currently :: ''{code}
> It might be expected that the resulting body would either be true or false.
> I am not sure if the below behaviour is as expected either - as they are
> similiar scenarios, but with different outcomes.
> {code}
> <!-- No error - but header is not an integer -->
> <setBody>
> <simple
> resultType="java.lang.Integer">${headers.missing}</simple>
> </setBody>
> <!-- Causes java.lang.NumberFormatException: For input string: ""
> -->
> <setBody>
> <simple resultType="java.lang.Integer"></simple>
> </setBody>
> {code}
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