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 }