| VelocityUtil.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 *
5 *
6 *
7 * The contents of this file are subject to the terms of the Liferay Enterprise
8 * Subscription License ("License"). You may not use this file except in
9 * compliance with the License. You can obtain a copy of the License by
10 * contacting Liferay, Inc. See the License for the specific language governing
11 * permissions and limitations under the License, including but not limited to
12 * distribution rights 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 public class VelocityUtil {
41
42 public static String evaluate(String input) throws Exception {
43 return evaluate(input, null);
44 }
45
46 public static String evaluate(String input, Map<String, Object> variables)
47 throws Exception {
48
49 Velocity.init();
50
51 VelocityContext vc = new VelocityContext();
52
53 if (variables != null) {
54 Iterator<Map.Entry<String, Object>> itr =
55 variables.entrySet().iterator();
56
57 while (itr.hasNext()) {
58 Map.Entry<String, Object> entry = itr.next();
59
60 String key = entry.getKey();
61 Object value = entry.getValue();
62
63 if (Validator.isNotNull(key)) {
64 vc.put(key, value);
65 }
66 }
67 }
68
69 StringWriter output = new StringWriter();
70
71 Velocity.evaluate(vc, output, VelocityUtil.class.getName(), input);
72
73 return output.toString();
74 }
75
76 }