// Copyright 2007 The Apache Software Foundation

 //

 // 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.apache.tapestry5.services;

 import org.apache.tapestry5.ioc.internal.util.Defense;

 /**

  * A contribution to the configuration of the {@link ApplicationStateManager}, identifying the strategy and creator for

  * a particular Session State Object (SSO), identified by the SSO's class.

  */

 public final class ApplicationStateContribution

 {

     private final String strategy;

     private final ApplicationStateCreator creator;

     public ApplicationStateContribution(String strategy)

     {

         this(strategy, null);

     }

     public ApplicationStateContribution(String strategy, ApplicationStateCreator creator)

     {

         Defense.notBlank(strategy, "strategy");

         this.strategy = strategy;

         this.creator = creator;

     }

     /**

      * The creator for the ASO. If null, the the ASO is created directly from the ASO class, via its public no-arguments

      * constructor.

      */

     public ApplicationStateCreator getCreator()

     {

         return creator;

     }

     /**

      * The name of the strategy used to control where the ASO is stored.

      */

     public String getStrategy()

     {

         return strategy;

     }

 }