Fuse 6 is no longer supported
As of February 2025, Red Hat Fuse 6 is no longer supported. If you are using Fuse 6, please upgrade to Red Hat build of Apache Camel.Ce contenu n'est pas disponible dans la langue sélectionnée.
31.7. Predicates
Basic predicates
Copier lienLien copié sur presse-papiers!
					You can use 
xpath in the Java DSL or the XML DSL in a context where a predicate is expected—for example, as the argument to a filter() processor or as the argument to a when() clause.
				
					For example, the following route filters incoming messages, allowing a message to pass, only if the 
/person/city element contains the value, London:
				from("direct:tie")
    .filter().xpath("/person/city = 'London'").to("file:target/messages/uk");
from("direct:tie")
    .filter().xpath("/person/city = 'London'").to("file:target/messages/uk");
					The following route evaluates the XPath predicate in a 
when() clause:
				from("direct:tie")
    .choice()
        .when(xpath("/person/city = 'London'")).to("file:target/messages/uk")
        .otherwise().to("file:target/messages/others");
from("direct:tie")
    .choice()
        .when(xpath("/person/city = 'London'")).to("file:target/messages/uk")
        .otherwise().to("file:target/messages/others");XPath predicate operators
Copier lienLien copié sur presse-papiers!
					The XPath language supports the standard XPath predicate operators, as shown in Table 31.2, “Operators for the XPath Language”.
				
| Operator | Description | 
|---|---|
| = | Equals. | 
| != | Not equal to. | 
| > | Greater than. | 
| >= | Greater than or equals. | 
| < | Less than. | 
| <= | Less than or equals. | 
| or | Combine two predicates with logical and. | 
| and | Combine two predicates with logical inclusive or. | 
| not() | Negate predicate argument. |