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Camel supports XPath to allow an Expression or Predicate to be used in the DSL or Xml Configuration. For example you could use XPath to create an Predicate in a Message Filter or as an Expression for a Recipient List.

From 1.3 of Camel onwards you can use XPath expressions directly using smart completion in your IDE as follows:

from("queue:foo").
  filter().xpath("//foo")).
  to("queue:bar")

from("queue:foo").
  choice().xpath("//foo")).to("queue:bar").
  otherwise().to("queue:others");

Notice: The xpath is outside the filter node; after the ( ) braces.

In earlier versions of Camel you had to use the XPathBuilder methods then you can use the xpath() function inside your rules.

import static org.apache.camel.builder.xml.XPathBuilder.*;
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from("queue:foo").filter(xpath("//foo")).to("queue:bar")

import static org.apache.camel.builder.xml.XPathBuilder.*;
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from("queue:foo").choice(xpath("//foo")).to("queue:bar").
otherwise().to("queue:others");

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Namespaces

In 1.3 onwards you can easily use namespaces with XPath expressions using the Namespaces helper class.

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