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Java > Open Source Codes > org > apache > roller > ui > rendering > velocity > VelocityRendererFactory


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. The ASF licenses this file to You
4  * under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License. For additional information regarding
15  * copyright in this work, please see the NOTICE file in the top level
16  * directory of this distribution.
17  */
18
19 package org.apache.roller.ui.rendering.velocity;
20
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23 import org.apache.roller.pojos.Template;
24 import org.apache.roller.ui.rendering.Renderer;
25 import org.apache.roller.ui.rendering.RendererFactory;
26
27
28 /**
29  * Velocity RendererFactory for Roller.
30  */
31 public class VelocityRendererFactory implements RendererFactory {
32     
33     private static Log log = LogFactory.getLog(VelocityRendererFactory.class);
34     
35     
36     public Renderer getRenderer(Template template) {
37         
38         Renderer renderer = null;
39         
40         // nothing we can do with null values
41 if(template.getTemplateLanguage() == null || template.getId() == null) {
42             return null;
43         }
44         
45         if("velocity".equals(template.getTemplateLanguage())) {
46             
47             // standard velocity template
48 try {
49                renderer = new VelocityRenderer(template);
50             } catch(Exception JavaDoc ex) {
51                 // some kind of exception so we don't have a renderer
52 // we do catching/logging in VelocityRenderer constructor
53 return null;
54             }
55             
56         }
57         
58         return renderer;
59     }
60     
61 }
62
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