01: /**
02: * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
03: *
04: * Permission is hereby granted, free of charge, to any person obtaining a copy
05: * of this software and associated documentation files (the "Software"), to deal
06: * in the Software without restriction, including without limitation the rights
07: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
08: * copies of the Software, and to permit persons to whom the Software is
09: * 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: */package com.liferay.portal.velocity;
22:
23: import com.liferay.portal.kernel.util.Validator;
24:
25: import java.io.StringWriter;
26:
27: import java.util.Iterator;
28: import java.util.Map;
29:
30: import org.apache.velocity.VelocityContext;
31: import org.apache.velocity.app.Velocity;
32:
33: /**
34: * <a href="VelocityUtil.java.html"><b><i>View Source</i></b></a>
35: *
36: * @author Brian Wing Shun Chan
37: *
38: */
39: public class VelocityUtil {
40:
41: public static String evaluate(String input) throws Exception {
42: return evaluate(input, null);
43: }
44:
45: public static String evaluate(String input, Map variables)
46: throws Exception {
47:
48: Velocity.init();
49:
50: VelocityContext vc = new VelocityContext();
51:
52: if (variables != null) {
53: Iterator itr = variables.entrySet().iterator();
54:
55: while (itr.hasNext()) {
56: Map.Entry entry = (Map.Entry) itr.next();
57:
58: String key = (String) entry.getKey();
59: Object value = entry.getValue();
60:
61: if (Validator.isNotNull(key)) {
62: vc.put(key, value);
63: }
64: }
65: }
66:
67: StringWriter output = new StringWriter();
68:
69: Velocity.evaluate(vc, output, VelocityUtil.class.getName(),
70: input);
71:
72: return output.toString();
73: }
74:
75: }
|