/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.myfaces.view.facelets.pool.impl;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import javax.faces.component.UIViewRoot;

 import javax.faces.context.FacesContext;

 import org.apache.myfaces.config.RuntimeConfig;

 import org.apache.myfaces.config.element.ViewPoolMapping;

 import org.apache.myfaces.config.element.ViewPoolParameter;

 import org.apache.myfaces.shared.util.ViewProtectionUtils;

 import org.apache.myfaces.view.facelets.ViewPoolProcessor;

 import org.apache.myfaces.view.facelets.pool.ViewPool;

 import org.apache.myfaces.view.facelets.pool.ViewPoolFactory;

 /**

  *

  */

 public class ViewPoolFactoryImpl extends ViewPoolFactory

 {

     private List<String> urlPatterns;

     private List<ViewPool> viewPoolList;

     private ViewPool defaultViewPool;

     public ViewPoolFactoryImpl(FacesContext context)

     {

         RuntimeConfig runtimeConfig = RuntimeConfig.getCurrentInstance(context.getExternalContext());

         // If no view pool mappings set, apply to all views.

         if (runtimeConfig.getViewPoolMappings().isEmpty())

         {

             defaultViewPool = new ViewPoolImpl(context, new HashMap<String, String>());

         }

         urlPatterns = new ArrayList<String>();

         viewPoolList = new ArrayList<ViewPool>();

         for (ViewPoolMapping vpm : runtimeConfig.getViewPoolMappings())

         {

             urlPatterns.add(vpm.getUrlPattern());

             Map<String,String> parameters = new HashMap<String, String>();

             for (ViewPoolParameter param : vpm.getParameterList())

             {

                 parameters.put(param.getName(), param.getValue());

             }

             viewPoolList.add(new ViewPoolImpl(context, parameters));

         }

     }

     @Override

     public ViewPool getViewPool(FacesContext context, UIViewRoot root)

     {

         for (int i = 0; i < urlPatterns.size(); i++)

         {

             String urlPattern = urlPatterns.get(i);

             if (ViewProtectionUtils.matchPattern(root.getViewId(), urlPattern))

             {

                 return viewPoolList.get(i);

             }

         }

         if (defaultViewPool != null)

         {

             // The default view pool applies to all views that does not have any view pool mapping,

             // but only when oamEnableViewPool is set, so we need a check here when it is not to avoid

             // use view pool on all views when only alwaysRecompile is set to true.

             Boolean enableViewPool = (Boolean) root.getAttributes().get(ViewPoolProcessor.ENABLE_VIEW_POOL);

             if (enableViewPool == null)

             {

                 return null;

             }

             return defaultViewPool;

         }

         return null;

     }

 }