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 import org.apache.velocity.util.StringUtils; 26 27 /** 28 * Factory to grab a template loader. 29 * 30 * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a> 31 * @version $Id: ResourceLoaderFactory.java 687177 2008-08-19 22:00:32Z nbubna $ 32 */ 33 public class ResourceLoaderFactory 34 { 35 /** 36 * Gets the loader specified in the configuration file. 37 * @param rs 38 * @param loaderClassName 39 * @return TemplateLoader 40 * @throws Exception 41 */ 42 public static ResourceLoader getLoader(RuntimeServices rs, String loaderClassName) 43 throws Exception 44 { 45 ResourceLoader loader = null; 46 47 try 48 { 49 loader = (ResourceLoader) ClassUtils.getNewInstance( loaderClassName ); 50 51 rs.getLog().debug("ResourceLoader instantiated: " 52 + loader.getClass().getName()); 53 54 return loader; 55 } 56 // The ugly three strike again: ClassNotFoundException,IllegalAccessException,InstantiationException 57 catch(Exception e) 58 { 59 String msg = "Problem instantiating the template loader: "+loaderClassName+".\n" + 60 "Look at your properties file and make sure the\n" + 61 "name of the template loader is correct."; 62 rs.getLog().error(msg, e); 63 throw new VelocityException(msg, e); 64 } 65 } 66 }