[CAMEL-7492] xpath/xquery - Allow to suppress exceptions when used as predicate

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Fix Version/s: Future
• Component/s: camel-core, camel-saxon
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Claus Ibsen
• Created: 10/Jun/14 08:51
• Updated: 02/Feb/15 19:02
• Resolved: 02/Feb/15 19:02

Description

See
http://stackoverflow.com/questions/24124015/apache-camel-xpath-routing

If you use a content based router, and have different kind of xml coming in, you may want to ignore any exceptions, if a < xpath > expression fails to evaluate as the xml does not fit that format.

So if we have

   <xpath ignoreException="true">/foo/bar</xpath>

eg a new attribute to set a flag to ignore exceptions. Though naming is hard, so maybe there is a better name for the attribute.

Related is also the validate eip, but I dont think we can use that as an expression/predicate: http://camel.apache.org/validate

Otherwise we could do something like this; which may be even better as then it works with any Camel expression/predicate.

<choice>
   <when><validate><xpath>/foo/bar</xpath></validate>
     <to uri="jms:fooOrBar"/>
  </when>
  ...