org.springframework.integration.support.NullAwarePayloadArgumentResolver Maven / Gradle / Ivy
/*
* Copyright 2018-2019 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
*
* https://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.integration.support;
import org.springframework.messaging.converter.MessageConverter;
import org.springframework.messaging.handler.annotation.support.PayloadMethodArgumentResolver;
import org.springframework.validation.Validator;
/**
* A {@link PayloadMethodArgumentResolver} that treats KafkaNull payloads as null.
* {@link org.springframework.messaging.handler.annotation.Payload @Paylaod}
* annotation must have required = false.
*
* @author Gary Russell
* @since 5.1
*
*/
public class NullAwarePayloadArgumentResolver extends PayloadMethodArgumentResolver {
public NullAwarePayloadArgumentResolver(MessageConverter messageConverter) {
super(messageConverter, null, false);
}
public NullAwarePayloadArgumentResolver(MessageConverter messageConverter, Validator validator) {
super(messageConverter, validator, false);
}
@Override
protected boolean isEmptyPayload(Object payload) {
return super.isEmptyPayload(payload) || "KafkaNull".equals(payload.getClass().getSimpleName());
}
}