/*

  * $Id: PortletApplicationContext.java 1297705 2012-03-06 20:44:30Z nlebas $

  *

  * 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.tiles.request.portlet;

 import java.net.MalformedURLException;

 import java.net.URL;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Locale;

 import java.util.Map;

 import javax.portlet.PortletContext;

 import org.apache.tiles.request.ApplicationContext;

 import org.apache.tiles.request.ApplicationResource;

 import org.apache.tiles.request.collection.ReadOnlyEnumerationMap;

 import org.apache.tiles.request.collection.ScopeMap;

 import org.apache.tiles.request.locale.URLApplicationResource;

 import org.apache.tiles.request.portlet.extractor.ApplicationScopeExtractor;

 import org.apache.tiles.request.portlet.extractor.InitParameterExtractor;

 /**

  * Portlet-based TilesApplicationContext implementation.

  *

  * @version $Rev: 1297705 $ $Date: 2012-03-07 07:44:30 +1100 (Wed, 07 Mar 2012) $

  */

 public class PortletApplicationContext implements ApplicationContext {

     /**

      * <p>The lazily instantiated <code>Map</code> of application scope

      * attributes.</p>

      */

     private Map<String, Object> applicationScope = null;

     /**

      * <p>The <code>PortletContext</code> for this web application.</p>

      */

     protected PortletContext context = null;

     /**

      * <p>The lazily instantiated <code>Map</code> of context initialization

      * parameters.</p>

      */

     private Map<String, String> initParam = null;

     /**

      * Creates a new instance of PortletTilesApplicationContext.

      *

      * @param context The portlet context to use.

      */

     public PortletApplicationContext(PortletContext context) {

         initialize(context);

     }

     /** {@inheritDoc} */

     public Object getContext() {

         return context;

     }

     /**

      * <p>Initialize (or reinitialize) this {@link PortletApplicationContext} instance

      * for the specified Portlet API objects.</p>

      *

      * @param context The <code>PortletContext</code> for this web application

      */

     public void initialize(PortletContext context) {

         // Save the specified Portlet API object references

         this.context = context;

     }

     /**

      * <p>Return the {@link PortletContext} for this context.</p>

      *

      * @return The original portlet context.

      */

     public PortletContext getPortletContext() {

         return (this.context);

     }

     /** {@inheritDoc} */

     public Map<String, Object> getApplicationScope() {

         if ((applicationScope == null) && (context != null)) {

             applicationScope = new ScopeMap(new ApplicationScopeExtractor(context));

         }

         return (applicationScope);

     }

     /** {@inheritDoc} */

     public Map<String, String> getInitParams() {

         if ((initParam == null) && (context != null)) {

             initParam = new ReadOnlyEnumerationMap<String>(new InitParameterExtractor(context));

         }

         return (initParam);

     }

     /** {@inheritDoc} */

     public ApplicationResource getResource(String localePath) {

         try {

             URL url = context.getResource(localePath);

             if (url != null) {

                 return new URLApplicationResource(localePath, url);

             } else {

                 return null;

             }

         } catch (MalformedURLException e) {

             return null;

         }

     }

     /** {@inheritDoc} */

     public ApplicationResource getResource(ApplicationResource base, Locale locale) {

         try {

             URL url = context.getResource(base.getLocalePath(locale));

             if (url != null) {

                 return new URLApplicationResource(base.getPath(), locale, url);

             } else {

                 return null;

             }

         } catch (MalformedURLException e) {

             return null;

         }

     }

     /** {@inheritDoc} */

     public Collection<ApplicationResource> getResources(String path) {

         ArrayList<ApplicationResource> resources = new ArrayList<ApplicationResource>();

         resources.add(getResource(path));

         return resources;

     }

 }