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 }