001/* 002 * Copyright 2002-2008 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.beans.factory.config; 018 019import org.springframework.beans.BeansException; 020 021/** 022 * Strategy interface for resolving a value through evaluating it 023 * as an expression, if applicable. 024 * 025 * <p>A raw {@link org.springframework.beans.factory.BeanFactory} does not 026 * contain a default implementation of this strategy. However, 027 * {@link org.springframework.context.ApplicationContext} implementations 028 * will provide expression support out of the box. 029 * 030 * @author Juergen Hoeller 031 * @since 3.0 032 */ 033public interface BeanExpressionResolver { 034 035 /** 036 * Evaluate the given value as an expression, if applicable; 037 * return the value as-is otherwise. 038 * @param value the value to check 039 * @param evalContext the evaluation context 040 * @return the resolved value (potentially the given value as-is) 041 * @throws BeansException if evaluation failed 042 */ 043 Object evaluate(String value, BeanExpressionContext evalContext) throws BeansException; 044 045}