Expressions and Predicates can then be used to create the various Enterprise Integration Patterns in the DSL or Xml Configuration like the Recipient List.
The API for a Camel Expression is defined in the org.apache.camel.Expression interface as shown:
The API for a Camel Predicate is defined in the org.apache.camel.Predicate interface as shown:
The following languages are supported out of the box
Most of these languages is also supported used as Annotation Based Expression Language.
To use different expression and predicates in your IDE you need to perform a static import of the builder class for the language(s) you wish to use.