I need to check if a message has an attachment.
In Camel2 I used the following expression:
<simple>${exchange.getIn().hasAttachments}</simple>
As attachment was modularized in Camel 3, the hasAttachments method isn't
directly available on the exchange anymore (it now extends Message).
Based on the documentation:
https://camel.apache.org/components/3.20.x/others/attachments.html
I tried:
<simple>${exchange.getIn(AttachmentMessage.class).hasAttachments}</simple>
Using Java code directly this works, but from the XML DSL this gives:
org.apache.camel.component.bean.ParameterBindingException: Error during
parameter binding on method: public abstract java.lang.Object
org.apache.camel.Exchange.getIn(java.lang.Class) at parameter #0 with type:
class java.lang.Class with value type: class java.lang.String and value:
AttachmentMessage.class
The parameter is seen as a String object, instead of AttachmentMessage
object. How to properly pass the type parameter in the XML DSL with a
simple expression? If there is an alternative way to check attachments this
also fine, but I'm trying to avoid using processors or bean invocation
though.
Raymond
