/*
* Copyright 2004-2012 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.webflow.engine.support;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.core.style.ToStringCreator;
import org.springframework.webflow.engine.VariableValueFactory;
import org.springframework.webflow.execution.RequestContext;
/**
* A bean-factory backed variable value factory. Relies on an autowire-capable bean factory to wire variable value
* dependencies on value creation and restoration.
*
* @author Keith Donald
*/
public class BeanFactoryVariableValueFactory implements VariableValueFactory {
/**
* The class of variable value. Typically a Java bean.
*/
private Class<?> type;
/**
* The backing bean factory that will create and restore variable instances.
*/
private AutowireCapableBeanFactory beanFactory;
/**
* Creates a new bean factory variable factory.
* @param type the variable class
* @param beanFactory the bean factory that will create and restore variable instances.
*/
public BeanFactoryVariableValueFactory(Class<?> type, AutowireCapableBeanFactory beanFactory) {
this.type = type;
this.beanFactory = beanFactory;
}
public Object createInitialValue(RequestContext context) {
return beanFactory.createBean(type);
}
public void restoreReferences(Object value, RequestContext context) {
if (value != null) {
beanFactory.autowireBean(value);
}
}
public String toString() {
return new ToStringCreator(this).append("type", type).toString();
}
}