package org.apache.maven.doxia.module.site.manager;

 /*

  * 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.

  */

 import java.util.Collection;

 import java.util.LinkedHashMap;

 import java.util.Map;

 import org.apache.maven.doxia.module.site.SiteModule;

 /**

  * Simple implementation of the SiteModuleManager interface.

  *

  * @author Jason van Zyl

  * @version $Id: DefaultSiteModuleManager.java 1090706 2011-04-09 23:15:28Z hboutemy $

  * @since 1.0

  * @plexus.component

  */

 public class DefaultSiteModuleManager

     implements SiteModuleManager

 {

     /**

      * @plexus.requirement role="org.apache.maven.doxia.module.site.SiteModule"

      */

     private Map<String, SiteModule> siteModules;

     private Collection<SiteModule> siteModulesValues;

     /** {@inheritDoc} */

     public Collection<SiteModule> getSiteModules()

     {

         if ( siteModulesValues == null )

         {

             Map<Class<?>, SiteModule> siteModulesTmp = new LinkedHashMap<Class<?>, SiteModule>();

             for ( SiteModule module : siteModules.values() )

             {

                 siteModulesTmp.put( module.getClass(), module );

             }

             siteModulesValues = siteModulesTmp.values();

         }

         return siteModulesValues;

     }

     /** {@inheritDoc} */

     public SiteModule getSiteModule( String id )

         throws SiteModuleNotFoundException

     {

         SiteModule siteModule = siteModules.get( id );

         if ( siteModule == null )

         {

             throw new SiteModuleNotFoundException( "Cannot find site module id = " + id );

         }

         return siteModule;

     }

 }