| /* |
| * 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.webapp; |
| |
| import jakarta.faces.FacesException; |
| import jakarta.servlet.ServletContext; |
| |
| import org.apache.myfaces.config.MyfacesConfig; |
| import org.apache.myfaces.util.lang.ClassUtils; |
| |
| /** |
| * Simple Factory to get a FacesInitializer implementation either from a web.xml |
| * parameter or from a list of default implementations. |
| * |
| * @author Jakob Korherr (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| */ |
| public class FacesInitializerFactory |
| { |
| /** |
| * Gets the FacesInitializer for the system. |
| * @param context |
| * @return |
| */ |
| public static FacesInitializer getFacesInitializer(ServletContext context) |
| { |
| FacesInitializer initializer = getFacesInitializerFromInitParam(context); |
| if (initializer == null) |
| { |
| initializer = new FacesInitializerImpl(); |
| } |
| return initializer; |
| } |
| |
| /** |
| * Gets a FacesInitializer from the web.xml config param. |
| * @param context |
| * @return |
| */ |
| private static FacesInitializer getFacesInitializerFromInitParam(ServletContext context) |
| { |
| String initializerClassName = context.getInitParameter(MyfacesConfig.FACES_INITIALIZER); |
| if (initializerClassName != null) |
| { |
| try |
| { |
| // get Class object |
| Class<?> clazz = ClassUtils.classForName(initializerClassName); |
| if (!FacesInitializer.class.isAssignableFrom(clazz)) |
| { |
| throw new FacesException("Class " + clazz |
| + " does not implement FacesInitializer"); |
| } |
| |
| // create instance and return it |
| return (FacesInitializer) ClassUtils.newInstance(clazz); |
| } |
| catch (ClassNotFoundException cnfe) |
| { |
| throw new FacesException("Could not find class of specified FacesInitializer", cnfe); |
| } |
| } |
| return null; |
| } |
| } |