1 /* 2 * $Id: AttributeEvaluator.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 package org.apache.tiles.evaluator; 22 23 import org.apache.tiles.Attribute; 24 import org.apache.tiles.request.Request; 25 26 /** 27 * It represents an object that resolves a string to return an object. 28 * 29 * @version $Rev: 833737 $ $Date: 2009-11-08 06:17:09 +1100 (Sun, 08 Nov 2009) $ 30 * @since 2.1.0 31 */ 32 public interface AttributeEvaluator { 33 34 /** 35 * Evaluates an expression. 36 * 37 * @param expression The expression to evaluate. 38 * @param request The request object. 39 * @return The evaluated object. 40 * @since 2.1.0 41 */ 42 Object evaluate(String expression, Request request); 43 44 /** 45 * Evaluates an attribute value. 46 * 47 * @param attribute The attribute to evaluate. 48 * @param request The request object. 49 * @return The evaluated object. 50 * @since 2.1.0 51 */ 52 Object evaluate(Attribute attribute, Request request); 53 }