[JBoss] Why does JBoss 7.4 choose a jar from jboss iso a jar in WEB-INF/lib of the application?

In the pom of a project which uses jaxb there is the dependency,

<dependency>
<groupId>jakarta.xml.bind</groupId>
<artifactId>jakarta.xml.bind-api</artifactId>
<version>2.3.3</version>
</dependency>


When you build the application the corresponding jar is in WEB-INF/lib.

In the code I ask which jar JAXBContext is in;

URL location = JAXBContext.class.getProtectionDomain().getCodeSource().getLocation();

It says that it is not the jar in WEB-INF/lib, but the jar in jboss,

jboss-eap-7.4_upgrade/modules/system/layers/base/javax/xml/bind/api/main/jboss-jaxb-api_2.3_spec-2.0.1.Final-redhat-00001.jar!/


I expected that it would have been the jar in WEB-INF/lib. Which rule JBoss uses to choose the jar?

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