/* * Copyright (c) 2002-2012 Alibaba Group Holding Limited. * All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.alibaba.citrus.expr; /** * 代表表达式的上下文。 * * @author Michael Zhou */ public interface ExpressionContext { /** * 取得指定值。 * * @param key 键 * @return 键对应的值 */ Object get(String key); /** * 添加一个值。 * * @param key 键 * @param value 对应的值 */ void put(String key, Object value); }