001// Copyright 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry.engine.state;
016
017/**
018 * Interface for the nuts and bolts of getting and storing application state objects. These are
019 * intended to be stateless, and manage a number of state objects, mapping objectNames to internal
020 * storage in some way.
021 * 
022 * @author Howard M. Lewis Ship
023 * @since 4.0
024 */
025public interface StateObjectPersistenceManager
026{
027    public boolean exists(String objectName);
028
029    public Object get(String objectName, StateObjectFactory factory);
030
031    public void store(String objectName, Object stateObject);
032}