| VelocityUtil.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17 * SOFTWARE.
18 */
19
20 package com.liferay.portal.velocity;
21
22 import com.liferay.portal.kernel.util.Validator;
23
24 import java.io.StringWriter;
25
26 import java.util.Iterator;
27 import java.util.Map;
28
29 import org.apache.velocity.VelocityContext;
30 import org.apache.velocity.app.Velocity;
31
32 /**
33 * <a href="VelocityUtil.java.html"><b><i>View Source</i></b></a>
34 *
35 * @author Brian Wing Shun Chan
36 *
37 */
38 public class VelocityUtil {
39
40 public static String evaluate(String input) throws Exception {
41 return evaluate(input, null);
42 }
43
44 public static String evaluate(String input, Map<String, Object> variables)
45 throws Exception {
46
47 Velocity.init();
48
49 VelocityContext vc = new VelocityContext();
50
51 if (variables != null) {
52 Iterator<Map.Entry<String, Object>> itr =
53 variables.entrySet().iterator();
54
55 while (itr.hasNext()) {
56 Map.Entry<String, Object> entry = itr.next();
57
58 String key = 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(), input);
70
71 return output.toString();
72 }
73
74 }