/*

  * 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 javax.faces;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import javax.faces.internal.FactoryFinderUtil;

 import org.seasar.framework.util.AssertionUtil;

 /**

  * @author shot

  * @author higa

  */

 public final class FactoryFinder {

     public static final String APPLICATION_FACTORY = "javax.faces.application.ApplicationFactory";

     public static final String FACES_CONTEXT_FACTORY = "javax.faces.context.FacesContextFactory";

     public static final String LIFECYCLE_FACTORY = "javax.faces.lifecycle.LifecycleFactory";

     public static final String RENDER_KIT_FACTORY = "javax.faces.render.RenderKitFactory";

     private static final Map factories = new HashMap();

     private static final Map factoryClassNames = new HashMap();

     public static Object getFactory(String factoryName) throws FacesException {

         AssertionUtil.assertNotNull("factoryName", factoryName);

         if (!factoryClassNames.containsKey(factoryName)) {

             throw new IllegalStateException("no factory " + factoryName

                     + " configured for this application");

         }

         Object factory = factories.get(factoryName);

         if (factory == null) {

             List classNames = (List) factoryClassNames.get(factoryName);

             factory = FactoryFinderUtil.createFactoryInstance(factoryName,

                     classNames);

             factories.put(factoryName, factory);

             return factory;

         } else {

             return factory;

         }

     }

     public static void setFactory(String factoryName, String implName) {

         AssertionUtil.assertNotNull("factoryName", factoryName);

         FactoryFinderUtil.checkValidFactoryNames(factoryName);

         List classNameList = (List) factoryClassNames.get(factoryName);

         if (classNameList == null) {

             classNameList = new ArrayList();

             factoryClassNames.put(factoryName, classNameList);

         }

         if (classNameList.contains(implName)) {

             return;

         }

         classNameList.add(implName);

     }

     public static void releaseFactories() throws FacesException {

         factories.clear();

         factoryClassNames.clear();

     }

 }