/**
* Returns the {@link InterceptorsMetaData} which are applicable for the <code>beanName</code> in
* the <code>jbossMetaData</code>
*
* <p>An interceptor is considered as bound to an EJB if there's atleast one interceptor binding
* between the EJB and the interceptor class. The interceptor binding can either be through the
* use of <interceptor-binding> element in ejb-jar.xml or through the use of {@link Interceptors}
* annotation(s) in the EJB class.
*
* <p>If the EJB has an around-invoke element which uses class name other than the EJB class name,
* then even that class is considered as an interceptor class and is considered to be bound to the
* EJB.
*
* <p>For example: <session> <ejb-name>Dummy</ejb-name>
* <ejb-class>org.myapp.ejb.MyBean</ejb-class> <around-invoke> <class>org.myapp.SomeClass</class>
* <method-name>blah</method-name> </around-invoke> </session>
*
* <p>The <code>org.myapp.SomeClass</code> will be considered as a interceptor class bound to the
* EJB, <code>org.myapp.ejb.MyBean</code>, even if there is no explicit interceptor binding
* between that EJB and the <code>org.myapp.SomeClass</code>
*
* @param beanName The EJB name
* @param jbossMetaData The {@link JBossMetaData} corresponding to the <code>beanName</code>
* @return
* @throws NullPointerException If either of <code>beanName</code> or <code>jbossMetaData</code>
* is null
*/
public static InterceptorsMetaData getInterceptors(String beanName, JBossMetaData jbossMetaData) {
InterceptorsMetaData beanApplicableInterceptors = new InterceptorsMetaData();
if (jbossMetaData.getAssemblyDescriptor() == null) {
return beanApplicableInterceptors;
}
InterceptorBindingsMetaData allInterceptorBindings =
jbossMetaData.getAssemblyDescriptor().getInterceptorBindings();
if (allInterceptorBindings == null) {
return beanApplicableInterceptors;
}
InterceptorsMetaData allInterceptors = jbossMetaData.getInterceptors();
if (allInterceptors == null || allInterceptors.isEmpty()) {
return beanApplicableInterceptors;
}
return getInterceptors(beanName, allInterceptors, allInterceptorBindings);
}
/**
* Returns all interceptor classes which are present in the passed <code>jbossMetaData</code>.
*
* <p>A class is considered an interceptor class, if it is listed in either of the following:
*
* <ul>
* <li>In the <interceptor> element of ejb-jar.xml
* <li>In the <interceptor-binding> element of ejb-jar.xml
* <li>In the <class> sub-element of <around-invoke> element in the ejb-jar.xml
* <li>Marked as an interceptor class through the use of {@link Interceptors} annotation in a
* bean class
* </ul>
*
* @param jbossMetaData The {@link JBossMetaData} which will scanned for interceptor classes
* @return
*/
public static Collection<String> getAllInterceptorClasses(JBossMetaData jbossMetaData) {
Collection<String> allInterceptorClassNames = new HashSet<String>();
// process <interceptors>
InterceptorsMetaData interceptorsMetadata = jbossMetaData.getInterceptors();
if (interceptorsMetadata != null) {
for (InterceptorMetaData interceptor : interceptorsMetadata) {
if (interceptor.getInterceptorClass() != null) {
allInterceptorClassNames.add(interceptor.getInterceptorClass());
}
}
}
// process <interceptor-bindings> (a.k.a @Interceptors)
JBossAssemblyDescriptorMetaData assemblyDescriptor = jbossMetaData.getAssemblyDescriptor();
if (assemblyDescriptor != null) {
InterceptorBindingsMetaData interceptorBindings = assemblyDescriptor.getInterceptorBindings();
if (interceptorBindings != null) {
for (InterceptorBindingMetaData interceptorBinding : interceptorBindings) {
if (interceptorBinding != null) {
InterceptorClassesMetaData interceptorClasses =
interceptorBinding.getInterceptorClasses();
if (interceptorClasses != null) {
for (String interceptorClass : interceptorClasses) {
allInterceptorClassNames.add(interceptorClass);
}
}
}
}
}
}
// process around-invoke
JBossEnterpriseBeansMetaData enterpriseBeans = jbossMetaData.getEnterpriseBeans();
if (enterpriseBeans != null) {
for (JBossEnterpriseBeanMetaData enterpriseBean : enterpriseBeans) {
String enterpriseBeanClassName = enterpriseBean.getEjbClass();
AroundInvokesMetaData aroundInvokes = null;
if (enterpriseBean.isSession()) {
JBossSessionBeanMetaData sessionBean = (JBossSessionBeanMetaData) enterpriseBean;
aroundInvokes = sessionBean.getAroundInvokes();
} else if (enterpriseBean.isMessageDriven()) {
JBossMessageDrivenBeanMetaData messageDrivenBean =
(JBossMessageDrivenBeanMetaData) enterpriseBean;
aroundInvokes = messageDrivenBean.getAroundInvokes();
}
if (aroundInvokes == null || aroundInvokes.isEmpty()) {
continue;
}
for (AroundInvokeMetaData aroundInvoke : aroundInvokes) {
String targetClass = aroundInvoke.getClassName();
if (targetClass == null) {
continue;
}
// if the target class name is not the class name of the EJB,
// then as per the xsd, it is considered an interceptor class
if (targetClass.equals(enterpriseBeanClassName) == false) {
// it's an interceptor class
allInterceptorClassNames.add(targetClass);
}
}
}
}
// return the interceptor class names
return allInterceptorClassNames;
}
