/*
* Copyright 2002-2016 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.integration.config;
import org.springframework.expression.Expression;
import org.springframework.integration.handler.AbstractMessageProducingHandler;
import org.springframework.integration.transformer.ExpressionEvaluatingTransformer;
import org.springframework.integration.transformer.MessageTransformingHandler;
import org.springframework.integration.transformer.MethodInvokingTransformer;
import org.springframework.integration.transformer.Transformer;
import org.springframework.messaging.MessageHandler;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Factory bean for creating a Message Transformer.
*
* @author Mark Fisher
* @author Gary Russell
* @author David Liu
*/
public class TransformerFactoryBean extends AbstractStandardMessageHandlerFactoryBean {
private volatile Long sendTimeout;
public void setSendTimeout(Long sendTimeout) {
this.sendTimeout = sendTimeout;
}
@Override
protected MessageHandler createMethodInvokingHandler(Object targetObject, String targetMethodName) {
Assert.notNull(targetObject, "targetObject must not be null");
Transformer transformer = null;
if (targetObject instanceof Transformer) {
transformer = (Transformer) targetObject;
}
else {
this.checkForIllegalTarget(targetObject, targetMethodName);
if (StringUtils.hasText(targetMethodName)) {
transformer = new MethodInvokingTransformer(targetObject, targetMethodName);
}
else {
transformer = new MethodInvokingTransformer(targetObject);
}
}
return this.createHandler(transformer);
}
@Override
protected MessageHandler createExpressionEvaluatingHandler(Expression expression) {
Transformer transformer = new ExpressionEvaluatingTransformer(expression);
MessageTransformingHandler handler = this.createHandler(transformer);
handler.setPrimaryExpression(expression);
return handler;
}
protected MessageTransformingHandler createHandler(Transformer transformer) {
MessageTransformingHandler handler = new MessageTransformingHandler(transformer);
this.postProcessReplyProducer(handler);
return handler;
}
@Override
protected void postProcessReplyProducer(AbstractMessageProducingHandler handler) {
if (this.sendTimeout != null) {
handler.setSendTimeout(this.sendTimeout);
}
}
/**
* Always returns true - any {@link AbstractMessageProducingHandler} can
* be used directly.
*/
@Override
protected boolean canBeUsedDirect(AbstractMessageProducingHandler handler) {
return true; // Any AMPH can be a transformer
}
@Override
protected Class<? extends MessageHandler> getPreCreationHandlerType() {
return MessageTransformingHandler.class;
}
}