| VelocityUtil.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.velocity;
24
25 import com.liferay.portal.kernel.util.Validator;
26
27 import java.io.StringWriter;
28
29 import java.util.Iterator;
30 import java.util.Map;
31
32 import org.apache.velocity.VelocityContext;
33 import org.apache.velocity.app.Velocity;
34
35 /**
36 * <a href="VelocityUtil.java.html"><b><i>View Source</i></b></a>
37 *
38 * @author Brian Wing Shun Chan
39 *
40 */
41 public class VelocityUtil {
42
43 public static String evaluate(String input) throws Exception {
44 return evaluate(input, null);
45 }
46
47 public static String evaluate(String input, Map<String, Object> variables)
48 throws Exception {
49
50 Velocity.init();
51
52 VelocityContext vc = new VelocityContext();
53
54 if (variables != null) {
55 Iterator<Map.Entry<String, Object>> itr =
56 variables.entrySet().iterator();
57
58 while (itr.hasNext()) {
59 Map.Entry<String, Object> entry = itr.next();
60
61 String key = entry.getKey();
62 Object value = entry.getValue();
63
64 if (Validator.isNotNull(key)) {
65 vc.put(key, value);
66 }
67 }
68 }
69
70 StringWriter output = new StringWriter();
71
72 Velocity.evaluate(vc, output, VelocityUtil.class.getName(), input);
73
74 return output.toString();
75 }
76
77 }