001/* 002 * Copyright 2002-2019 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.handler; 018 019import java.util.ArrayList; 020import java.util.List; 021 022import org.springframework.util.StringUtils; 023 024/** 025 * Implementation of the {@link org.springframework.web.servlet.HandlerMapping} 026 * interface that maps from URLs to beans with names that start with a slash ("/"), 027 * similar to how Struts maps URLs to action names. 028 * 029 * <p>This is the default implementation used by the 030 * {@link org.springframework.web.servlet.DispatcherServlet}, along with 031 * {@link org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping}. 032 * Alternatively, {@link SimpleUrlHandlerMapping} allows for customizing a 033 * handler mapping declaratively. 034 * 035 * <p>The mapping is from URL to bean name. Thus an incoming URL "/foo" would map 036 * to a handler named "/foo", or to "/foo /foo2" in case of multiple mappings to 037 * a single handler. 038 * 039 * <p>Supports direct matches (given "/test" -> registered "/test") and "*" 040 * matches (given "/test" -> registered "/t*"). Note that the default is 041 * to map within the current servlet mapping if applicable; see the 042 * {@link #setAlwaysUseFullPath "alwaysUseFullPath"} property for details. 043 * For details on the pattern options, see the 044 * {@link org.springframework.util.AntPathMatcher} javadoc. 045 * 046 * @author Rod Johnson 047 * @author Juergen Hoeller 048 * @see SimpleUrlHandlerMapping 049 */ 050public class BeanNameUrlHandlerMapping extends AbstractDetectingUrlHandlerMapping { 051 052 /** 053 * Checks name and aliases of the given bean for URLs, starting with "/". 054 */ 055 @Override 056 protected String[] determineUrlsForHandler(String beanName) { 057 List<String> urls = new ArrayList<>(); 058 if (beanName.startsWith("/")) { 059 urls.add(beanName); 060 } 061 String[] aliases = obtainApplicationContext().getAliases(beanName); 062 for (String alias : aliases) { 063 if (alias.startsWith("/")) { 064 urls.add(alias); 065 } 066 } 067 return StringUtils.toStringArray(urls); 068 } 069 070}