spring RequestCondition 源码
spring RequestCondition 代码
文件路径：/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/RequestCondition.java
/*
* Copyright 2002-2016 the original author or authors.
*
* 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
*
* https://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 org.springframework.web.servlet.mvc.condition;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.lang.Nullable;
/**
* Contract for request mapping conditions.
*
* <p>Request conditions can be combined via {@link #combine(Object)}, matched to
* a request via {@link #getMatchingCondition(HttpServletRequest)}, and compared
* to each other via {@link #compareTo(Object, HttpServletRequest)} to determine
* which is a closer match for a given request.
*
* @author Rossen Stoyanchev
* @author Arjen Poutsma
* @since 3.1
* @param <T> the type of objects that this RequestCondition can be combined
* with and compared to
*/
public interface RequestCondition<T> {
/**
* Combine this condition with another such as conditions from a
* type-level and method-level {@code @RequestMapping} annotation.
* @param other the condition to combine with.
* @return a request condition instance that is the result of combining
* the two condition instances.
*/
T combine(T other);
/**
* Check if the condition matches the request returning a potentially new
* instance created for the current request. For example a condition with
* multiple URL patterns may return a new instance only with those patterns
* that match the request.
* <p>For CORS pre-flight requests, conditions should match to the would-be,
* actual request (e.g. URL pattern, query parameters, and the HTTP method
* from the "Access-Control-Request-Method" header). If a condition cannot
* be matched to a pre-flight request it should return an instance with
* empty content thus not causing a failure to match.
* @return a condition instance in case of a match or {@code null} otherwise.
*/
@Nullable
T getMatchingCondition(HttpServletRequest request);
/**
* Compare this condition to another condition in the context of
* a specific request. This method assumes both instances have
* been obtained via {@link #getMatchingCondition(HttpServletRequest)}
* to ensure they have content relevant to current request only.
*/
int compareTo(T other, HttpServletRequest request);
}
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