org.springframework.integration.support.json.AbstractJacksonJsonMessageParser Maven / Gradle / Ivy
/*
* Copyright 2002-2019 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.json;
import java.lang.reflect.Type;
import java.util.Map;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.integration.support.DefaultMessageBuilderFactory;
import org.springframework.integration.support.MessageBuilderFactory;
import org.springframework.integration.support.utils.IntegrationUtils;
import org.springframework.lang.Nullable;
import org.springframework.messaging.Message;
/**
* Base {@link JsonInboundMessageMapper.JsonMessageParser} implementation for Jackson processors.
*
* @author Artem Bilan
*
* @since 3.0
*
*/
abstract class AbstractJacksonJsonMessageParser implements JsonInboundMessageMapper.JsonMessageParser
,
BeanFactoryAware {
private final JsonObjectMapper objectMapper;
private volatile JsonInboundMessageMapper messageMapper;
private volatile MessageBuilderFactory messageBuilderFactory = new DefaultMessageBuilderFactory();
private BeanFactory beanFactory;
private volatile boolean messageBuilderFactorySet;
protected AbstractJacksonJsonMessageParser(JsonObjectMapper objectMapper) {
this.objectMapper = objectMapper;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
protected MessageBuilderFactory getMessageBuilderFactory() {
if (!this.messageBuilderFactorySet) {
if (this.beanFactory != null) {
this.messageBuilderFactory = IntegrationUtils.getMessageBuilderFactory(this.beanFactory);
}
this.messageBuilderFactorySet = true;
}
return this.messageBuilderFactory;
}
@Override
public Message doInParser(JsonInboundMessageMapper messageMapperToUse, String jsonMessage,
@Nullable Map headers) {
if (this.messageMapper == null) {
this.messageMapper = messageMapperToUse;
}
P parser = this.createJsonParser(jsonMessage);
if (messageMapperToUse.isMapToPayload()) {
Object payload = readPayload(parser, jsonMessage);
return getMessageBuilderFactory()
.withPayload(payload)
.copyHeaders(headers)
.build();
}
else {
return parseWithHeaders(parser, jsonMessage, headers);
}
}
protected Object readPayload(P parser, String jsonMessage) {
try {
return this.objectMapper.fromJson(parser, this.messageMapper.getPayloadType());
}
catch (Exception e) {
throw new IllegalArgumentException("Mapping of JSON message '" + jsonMessage +
"' to payload type '" + this.messageMapper.getPayloadType() + "' failed.", e);
}
}
protected Object readHeader(P parser, String headerName, String jsonMessage) {
Class headerType = this.messageMapper.getHeaderTypes().getOrDefault(headerName, Object.class);
try {
return this.objectMapper.fromJson(parser, (Type) headerType);
}
catch (Exception e) {
throw new IllegalArgumentException("Mapping header '" + headerName + "' of JSON message '" +
jsonMessage + "' to header type '" + headerType + "' failed.", e);
}
}
protected abstract Message parseWithHeaders(P parser, String jsonMessage,
@Nullable Map headers);
protected abstract P createJsonParser(String jsonMessage);
}