io.joynr.provider.SubscriptionPublisherFactory Maven / Gradle / Ivy
/*
* #%L
* %%
* Copyright (C) 2017 BMW Car IT GmbH
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
package io.joynr.provider;
public class SubscriptionPublisherFactory {
/*
* Suppressing warnings allows to case a provider to SubscriptionPublisherInjection without template
* parameter. It is guaranteed by the generated joynr providers that the cast works as expected
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public AbstractSubscriptionPublisher create(final Object provider) {
String interfaceClassName = ProviderAnnotations.getProvidedInterface(provider).getName();
String subscriptionPublisherClassName = interfaceClassName + SubscriptionPublisher.class.getSimpleName();
String subcriptionPublisherImplClassName = subscriptionPublisherClassName + "Impl";
try {
Class subscriptionPublisherImplClass = Class.forName(subcriptionPublisherImplClassName);
AbstractSubscriptionPublisher subscriptionPublisherImpl = (AbstractSubscriptionPublisher) subscriptionPublisherImplClass.newInstance();
try {
Class subscriptionPublisherInjectionClass = Class.forName(subscriptionPublisherClassName
+ "Injection");
if (subscriptionPublisherInjectionClass.isInstance(provider)) {
((SubscriptionPublisherInjection) provider).setSubscriptionPublisher(subscriptionPublisherImpl);
}
} catch (ClassNotFoundException exception) {
//if subscriptionPublisherInjectionClassname could not be found, we assume that the provider does not require a SubscriptionPublisher
}
return subscriptionPublisherImpl;
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("For given provider of joynr interface \"" + interfaceClassName
+ "\", expected subscription publisher class of type \"" + subcriptionPublisherImplClassName
+ "\" could not be found by the classloader." + " Please ensure the class can be loaded.");
} catch (InstantiationException e) {
throw new IllegalArgumentException("For given provider of joynr interface \"" + interfaceClassName
+ "\", expected subscription publisher class of type \"" + subcriptionPublisherImplClassName
+ "\" could not be instantiated due to the following error: " + e.getMessage());
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("For given provider of joynr interface \"" + interfaceClassName
+ "\", expected subscription publisher class of type \"" + subcriptionPublisherImplClassName
+ "\" could not be accessed due to the following error: " + e.getMessage());
}
}
}