/*
* Copyright 2013-2014 the original author or authors.
*
* 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.
*/
package org.springframework.cloud.aws.messaging.support;
import org.springframework.cloud.aws.messaging.config.annotation.NotificationSubject;
import org.springframework.cloud.aws.messaging.support.converter.NotificationRequestConverter;
import org.springframework.core.MethodParameter;
import org.springframework.messaging.Message;
import org.springframework.messaging.converter.MessageConverter;
import org.springframework.messaging.converter.StringMessageConverter;
import org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolver;
import org.springframework.util.ClassUtils;
/**
* @author Alain Sahli
*/
public class NotificationSubjectArgumentResolver implements HandlerMethodArgumentResolver {
private final MessageConverter converter;
public NotificationSubjectArgumentResolver() {
this.converter = new NotificationRequestConverter(new StringMessageConverter());
}
@Override
public boolean supportsParameter(MethodParameter parameter) {
return (parameter.hasParameterAnnotation(NotificationSubject.class) &&
ClassUtils.isAssignable(String.class, parameter.getParameterType()));
}
@Override
public Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception {
return ((NotificationRequestConverter.NotificationRequest) this.converter.fromMessage(message, String.class)).getSubject();
}
}