org.springframework.webflow.engine.VariableValueFactory Maven / Gradle / Ivy
/*
* Copyright 2004-2008 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;
import org.springframework.webflow.execution.RequestContext;
/**
* A strategy that encapsulates the source of a flow variable value.
* @author Keith Donald
*/
public interface VariableValueFactory {
/**
* Creates the variable's initial value.
* @param context the currently executing flow request
* @return the value
*/
public Object createInitialValue(RequestContext context);
/**
* Restore any references the variable's value needs to other objects. Such references may have been lost during
* deserialization, for example, and need to be restored.
* @param value the current variable value
* @param context the currently executing flow request
*/
public void restoreReferences(Object value, RequestContext context);
}