@Override
public void validate() {
// Make sure more than one 'position' isn't picked.
int positions = 0;
if (before != null) positions++;
if (after != null) positions++;
if (index > -1) positions++;
if (!position.equals(Position.OTHER_THAN_FIRST_OR_LAST)) positions++;
switch (positions) {
case 0:
throw log.missingCustomInterceptorPosition(interceptor.getClass().getName());
case 1:
break;
default:
throw log.multipleCustomInterceptorPositions(interceptor.getClass().getName());
}
if (interceptor == null) {
throw log.customInterceptorMissingClass();
}
if (!(interceptor instanceof BaseCustomInterceptor)) {
log.suggestCustomInterceptorInheritance(interceptor.getClass().getName());
}
}
/**
* Replaces the existing interceptor chain in the cache wih one represented by the interceptor
* passed in. This utility updates dependencies on all components that rely on the interceptor
* chain as well.
*
* @param cache cache that needs to be altered
* @param interceptor the first interceptor in the new chain.
*/
public static void replaceInterceptorChain(Cache cache, CommandInterceptor interceptor) {
ComponentRegistry cr = extractComponentRegistry(cache);
// make sure all interceptors here are wired.
CommandInterceptor i = interceptor;
do {
cr.wireDependencies(i);
} while ((i = i.getNext()) != null);
InterceptorChain inch = cr.getComponent(InterceptorChain.class);
inch.setFirstInChain(interceptor);
}
/**
* Replaces an existing interceptor of the given type in the interceptor chain with a new
* interceptor instance passed as parameter.
*
* @param replacingInterceptor the interceptor to add to the interceptor chain
* @param toBeReplacedInterceptorType the type of interceptor that should be swapped with the new
* one
* @return true if the interceptor was replaced
*/
public static boolean replaceInterceptor(
Cache cache,
CommandInterceptor replacingInterceptor,
Class<? extends CommandInterceptor> toBeReplacedInterceptorType) {
ComponentRegistry cr = extractComponentRegistry(cache);
// make sure all interceptors here are wired.
CommandInterceptor i = replacingInterceptor;
do {
cr.wireDependencies(i);
} while ((i = i.getNext()) != null);
InterceptorChain inch = cr.getComponent(InterceptorChain.class);
return inch.replaceInterceptor(replacingInterceptor, toBeReplacedInterceptorType);
}