1 package org.apache.velocity.runtime.resource.loader; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import org.apache.velocity.exception.VelocityException; 23 import org.apache.velocity.runtime.RuntimeServices; 24 import org.apache.velocity.util.ClassUtils; 25 26 /** 27 * Factory to grab a template loader. 28 * 29 * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a> 30 * @version $Id$ 31 */ 32 public class ResourceLoaderFactory 33 { 34 /** 35 * Gets the loader specified in the configuration file. 36 * @param rs 37 * @param loaderClassName 38 * @return TemplateLoader 39 */ getLoader(RuntimeServices rs, String loaderClassName)40 public static ResourceLoader getLoader(RuntimeServices rs, String loaderClassName) 41 { 42 ResourceLoader loader = null; 43 44 try 45 { 46 loader = (ResourceLoader) ClassUtils.getNewInstance( loaderClassName ); 47 48 rs.getLog().debug("ResourceLoader instantiated: {}", loader.getClass().getName()); 49 50 return loader; 51 } 52 // The ugly three strike again: ClassNotFoundException,IllegalAccessException,InstantiationException 53 catch(Exception e) 54 { 55 String msg = "Problem instantiating the template loader: "+loaderClassName+"." + System.lineSeparator() + 56 "Look at your properties file and make sure the" + System.lineSeparator() + 57 "name of the template loader is correct."; 58 rs.getLog().error(msg, e); 59 throw new VelocityException(msg, e); 60 } 61 } 62 } 63