org.springframework.webflow.action.Memento 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 java.io.Serializable;
/**
* An abstract base class for mementos that encapsulate the state of a
* {@link MementoOriginator}. Basically, a token storing the state of another
* object.
*
* Mementos are expected to be managed by caretakers (clients) without
* the clents being aware of their internal structure. Only the originator is aware of
* the internal structure of a concrete Memento implementation.
*
* Memento is an abstract class because it's expected implementations are concrete
* mementos and not part of some other inheritence hierarchy. Mementos are
* serializable snapshots of data.
*
* @see org.springframework.webflow.action.MementoOriginator
*
* @author Keith Donald
*/
public abstract class Memento implements Serializable {
}