/**
* Discovers annotated methods on the action and calls them according to the workflow
*
* @see
* com.opensymphony.xwork2.interceptor.Interceptor#intercept(com.opensymphony.xwork2.ActionInvocation)
*/
public String intercept(ActionInvocation invocation) throws Exception {
final Object action = invocation.getAction();
invocation.addPreResultListener(this);
List<Method> methods =
new ArrayList<Method>(AnnotationUtils.getAnnotatedMethods(action.getClass(), Before.class));
if (methods.size() > 0) {
// methods are only sorted by priority
Collections.sort(
methods,
new Comparator<Method>() {
public int compare(Method method1, Method method2) {
return comparePriorities(
method1.getAnnotation(Before.class).priority(),
method2.getAnnotation(Before.class).priority());
}
});
for (Method m : methods) {
final String resultCode = (String) m.invoke(action, (Object[]) null);
if (resultCode != null) {
// shortcircuit execution
return resultCode;
}
}
}
String invocationResult = invocation.invoke();
// invoke any @After methods
methods =
new ArrayList<Method>(AnnotationUtils.getAnnotatedMethods(action.getClass(), After.class));
if (methods.size() > 0) {
// methods are only sorted by priority
Collections.sort(
methods,
new Comparator<Method>() {
public int compare(Method method1, Method method2) {
return comparePriorities(
method1.getAnnotation(After.class).priority(),
method2.getAnnotation(After.class).priority());
}
});
for (Method m : methods) {
m.invoke(action, (Object[]) null);
}
}
return invocationResult;
}
/**
* Invokes any @BeforeResult annotated methods
*
* @see
* com.opensymphony.xwork2.interceptor.PreResultListener#beforeResult(com.opensymphony.xwork2.ActionInvocation,String)
*/
public void beforeResult(ActionInvocation invocation, String resultCode) {
Object action = invocation.getAction();
List<Method> methods =
new ArrayList<Method>(
AnnotationUtils.getAnnotatedMethods(action.getClass(), BeforeResult.class));
if (methods.size() > 0) {
// methods are only sorted by priority
Collections.sort(
methods,
new Comparator<Method>() {
public int compare(Method method1, Method method2) {
return comparePriorities(
method1.getAnnotation(BeforeResult.class).priority(),
method2.getAnnotation(BeforeResult.class).priority());
}
});
for (Method m : methods) {
try {
m.invoke(action, (Object[]) null);
} catch (Exception e) {
throw new XWorkException(e);
}
}
}
}
