org.springframework.webflow.action.BeanStatePersister Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.action;
import org.springframework.webflow.RequestContext;
/**
* A service for managing the saving and restoring of state associated with a
* invokable bean.
*
* Some people might call what this strategy enables is memento-like
* bijection, where state is injected into a bean before
* invocation and then outjected after invocation.
*
* @author Keith Donald
*/
public interface BeanStatePersister {
/**
* Save (outject) the bean's state to the context.
* @param bean the bean
* @param context the flow execution request context
* @throws Exception an exception occured
*/
public void saveState(Object bean, RequestContext context);
/**
* Restore (inject) the bean's state from the context.
* @param bean the bean
* @param context the flow execution request context
* @return the bean
* @throws Exception an exception occured
*/
public Object restoreState(Object bean, RequestContext context);
}