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Java > Open Source Codes > com > opensymphony > webwork > portlet > sitemesh > VelocityUtils


1 /*
2  * Copyright (c) 2005 Opensymphony. All Rights Reserved.
3  */
4 package com.opensymphony.webwork.portlet.sitemesh;
5
6 import com.opensymphony.webwork.portlet.velocity.VelocityManager;
7 import org.apache.commons.logging.Log;
8 import org.apache.commons.logging.LogFactory;
9 import org.apache.velocity.Template;
10 import org.apache.velocity.VelocityContext;
11 import org.apache.velocity.app.VelocityEngine;
12 import org.apache.velocity.context.Context;
13
14 import java.io.StringWriter JavaDoc;
15 import java.util.Map JavaDoc;
16
17 /**
18  * @author <a HREF="mailto:hu_pengfei@yahoo.com.cn">Henry Hu </a>
19  * @since 2005-7-18
20  */
21 public class VelocityUtils {
22
23     private static final Log log = LogFactory.getLog(com.opensymphony.webwork.portlet.sitemesh.VelocityUtils.class);
24
25     public VelocityUtils() {
26     }
27
28     public static String JavaDoc getRenderedTemplate(String JavaDoc templateName, Map JavaDoc contextMap) {
29         return getRenderedTemplate(templateName, ((Context) (new VelocityContext(contextMap))));
30     }
31
32     public static String JavaDoc getRenderedTemplate(String JavaDoc templateName, Context context) {
33         try {
34             return getRenderedTemplateWithoutSwallowingErrors(templateName, context);
35         } catch (Exception JavaDoc e) {
36             log.error("Error occurred rendering template: " + templateName, e);
37             return "";
38         }
39     }
40
41     public static String JavaDoc getRenderedTemplateWithoutSwallowingErrors(String JavaDoc templateName, Context context) throws Exception JavaDoc {
42         Template template = getTemplate(templateName);
43         StringWriter JavaDoc tempWriter = new StringWriter JavaDoc();
44         template.merge(context, tempWriter);
45         return tempWriter.toString();
46     }
47
48     public static Template getTemplate(String JavaDoc templateName) throws Exception JavaDoc {
49         VelocityEngine velocityEngine = VelocityManager.getInstance().getVelocityEngine();
50
51         /*
52          * if (velocityEngine == null) { velocityEngine = new VelocityEngine();
53          * Properties props = new Properties();
54          * props.load(ClassLoaderUtils.getResourceAsStream("test-velocity.properties",
55          * com.opensymphony.webwork.portlet.sitemesh.VelocityUtils.class));
56          * props.list(System.out); velocityEngine.init(props); }
57          */
58         String JavaDoc encoding = "UTF-8";
59
60         Template template = velocityEngine.getTemplate(templateName, encoding);
61         return template;
62     }
63
64     public static String JavaDoc getRenderedContent(String JavaDoc templateContent, Map JavaDoc contextMap) {
65         try {
66             StringWriter JavaDoc tempWriter = new StringWriter JavaDoc();
67             VelocityContext context = new VelocityContext(contextMap);
68
69             VelocityManager.getInstance().getVelocityEngine().evaluate(context, tempWriter, "getRenderedContent", templateContent);
70             return tempWriter.toString();
71         } catch (Exception JavaDoc e) {
72             log.error("Error occurred rendering template content", e);
73             throw new InfrastructureException("Error occurred rendering template content", e);
74         }
75     }
76
77 }
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