[CAMEL-10189] camel-jsonpath - Add support for simple functions

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.18.0
• Component/s: camel-jsonpath
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Claus Ibsen
• Created: 27/Jul/16 11:26
• Updated: 31/Jul/16 08:02
• Resolved: 31/Jul/16 08:02

Description

See SO
http://stackoverflow.com/questions/38609231/can-i-use-camel-simple-expression-inside-jsonpath-language

We can roll our own predicates in jsonpath where you can use ? as the placeholder. The trick would be to either inline the functions in the string, and then do our own pre-parsing to replace those predicates to ?, eg

"$.person[?(@.role=='${headers.role}')]"

gets pre-parsed as

"$.person[?(@.role=='?')]"

And then we know that ${headers.role} is the simple funktion to execute as the predicate.