1 /* 2 * $Id: OGNLAttributeEvaluator.java 833737 2009-11-07 19:17:09Z apetrelli $ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 package org.apache.tiles.ognl; 23 24 import ognl.Ognl; 25 import ognl.OgnlException; 26 27 import org.apache.tiles.evaluator.AbstractAttributeEvaluator; 28 import org.apache.tiles.evaluator.EvaluationException; 29 import org.apache.tiles.request.Request; 30 31 /** 32 * Evaluates attribute expressions and expressions with OGNL language. 33 * 34 * @version $Rev: 833737 $ $Date: 2009-11-08 06:17:09 +1100 (Sun, 08 Nov 2009) $ 35 * @since 2.2.0 36 */ 37 public class OGNLAttributeEvaluator extends AbstractAttributeEvaluator { 38 39 /** {@inheritDoc} */ 40 public Object evaluate(String expression, Request request) { 41 if (expression == null) { 42 throw new IllegalArgumentException("The expression parameter cannot be null"); 43 } 44 try { 45 return Ognl.getValue(expression, request); 46 } catch (OgnlException e) { 47 throw new EvaluationException("Cannot evaluate OGNL expression '" 48 + expression + "'", e); 49 } 50 } 51 }