001/* 002 * Copyright 2002-2015 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.servlet.resource; 018 019/** 020 * A strategy for extracting and embedding a resource version in its URL path. 021 * 022 * @author Brian Clozel 023 * @author Rossen Stoyanchev 024 * @since 4.1 025*/ 026public interface VersionPathStrategy { 027 028 /** 029 * Extract the resource version from the request path. 030 * @param requestPath the request path to check 031 * @return the version string or {@code null} if none was found 032 */ 033 String extractVersion(String requestPath); 034 035 /** 036 * Remove the version from the request path. It is assumed that the given 037 * version was extracted via {@link #extractVersion(String)}. 038 * @param requestPath the request path of the resource being resolved 039 * @param version the version obtained from {@link #extractVersion(String)} 040 * @return the request path with the version removed 041 */ 042 String removeVersion(String requestPath, String version); 043 044 /** 045 * Add a version to the given request path. 046 * @param requestPath the requestPath 047 * @param version the version 048 * @return the requestPath updated with a version string 049 */ 050 String addVersion(String requestPath, String version); 051 052}