001/* 002 * Copyright 2002-2018 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.web.reactive.result.condition; 018 019import org.springframework.lang.Nullable; 020 021/** 022 * A contract for {@code "name!=value"} style expression used to specify request 023 * parameters and request header conditions in {@code @RequestMapping}. 024 * 025 * @author Rossen Stoyanchev 026 * @since 5.0 027 * @param <T> the value type 028 */ 029public interface NameValueExpression<T> { 030 031 String getName(); 032 033 @Nullable 034 T getValue(); 035 036 boolean isNegated(); 037 038}