/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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.seasar.teeda.core.application;

 import javax.faces.application.StateManager;

 import javax.faces.component.UIViewRoot;

 import javax.faces.context.FacesContext;

 /**

  * @author shot

  */

 public abstract class TeedaStateManager extends StateManager {

     protected static final String SERIALIZED_VIEW_ATTR = TeedaStateManager.class

             .getName()

             + ".SERIALIZED_VIEW";

     private TreeStructureManager treeStructureManager;

     public TreeStructureManager getTreeStructureManager() {

         return treeStructureManager;

     }

     public void setTreeStructureManager(

             TreeStructureManager treeStructureManager) {

         this.treeStructureManager = treeStructureManager;

     }

     public abstract void removeSerializedView(String viewId);

     public void saveViewToServer(FacesContext context, UIViewRoot viewRoot)

             throws IllegalStateException {

         SerializedView serializedView = createSerializedView(context, viewRoot);

         saveSerializedViewToServer(context, viewRoot.getViewId(),

                 serializedView);

     }

     public Object getComponentStateToSave(FacesContext context,

             UIViewRoot viewRoot) {

         if (viewRoot.isTransient()) {

             return null;

         }

         return viewRoot.processSaveState(context);

     }

     public Object getTreeStructureToSave(FacesContext context,

             UIViewRoot viewRoot) {

         if (viewRoot.isTransient()) {

             return null;

         }

         return getTreeStructureManager().buildTreeStructure(viewRoot);

     }

     protected SerializedView createSerializedView(FacesContext context) {

         Object struct = getTreeStructureToSave(context);

         Object state = getComponentStateToSave(context);

         return new SerializedView(struct, state);

     }

     protected SerializedView createSerializedView(FacesContext context,

             UIViewRoot viewRoot) {

         Object struct = getTreeStructureToSave(context, viewRoot);

         Object state = getComponentStateToSave(context, viewRoot);

         return new SerializedView(struct, state);

     }

     protected abstract void saveSerializedViewToServer(FacesContext context,

             String viewId, SerializedView serializedView);

     public abstract boolean hasSerializedView(FacesContext context,

             String viewId);

 }