/*
* Copyright 2002-2014 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.integration.transformer;
import java.lang.reflect.Method;
import org.springframework.integration.annotation.Transformer;
import org.springframework.integration.handler.MessageProcessor;
import org.springframework.integration.handler.MethodInvokingMessageProcessor;
import org.springframework.util.Assert;
/**
* A Message Transformer implementation that invokes the specified method
* on the given object. The method's return value will be considered as
* the payload of a new Message unless the return value is itself already
* a Message.
*
* @author Mark Fisher
* @author Artem Bilan
*/
public class MethodInvokingTransformer extends AbstractMessageProcessingTransformer {
public MethodInvokingTransformer(Object object, Method method) {
super(new MethodInvokingMessageProcessor<Object>(object, method));
Assert.state(!Void.class.isAssignableFrom(method.getReturnType()), "'transformer' method must not be 'void'.");
}
public MethodInvokingTransformer(Object object, String methodName) {
super(new MethodInvokingMessageProcessor<Object>(object, methodName));
}
public MethodInvokingTransformer(Object object) {
super(object instanceof MessageProcessor<?> ? (MessageProcessor<?>) object :
new MethodInvokingMessageProcessor<Object>(object, Transformer.class));
}
}