Java tutorial
/* * Copyright 2014 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 * * 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 de.codecentric.boot.admin.web; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; import org.springframework.web.servlet.HandlerMapping; import org.springframework.web.servlet.mvc.condition.PatternsRequestCondition; import org.springframework.web.servlet.mvc.method.RequestMappingInfo; import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping; /** * {@link HandlerMapping} to map {@code @RequestMapping} on objects and prefixes them. The semantics * of {@code @RequestMapping} should be identical to a normal {@code @Controller}, but the Objects * should not be annotated as {@code @Controller} (otherwise they will be mapped by the normal MVC * mechanisms). * * @author Johannes Edmeier */ public class PrefixHandlerMapping extends RequestMappingHandlerMapping { private String prefix = ""; private final Object handlers[]; public PrefixHandlerMapping(Object... handlers) { this.handlers = handlers.clone(); setOrder(-50); } @Override public void afterPropertiesSet() { super.afterPropertiesSet(); for (Object handler : handlers) { detectHandlerMethods(handler); } } @Override protected boolean isHandler(Class<?> beanType) { return false; } @Override protected void registerHandlerMethod(Object handler, Method method, RequestMappingInfo mapping) { if (mapping == null) { return; } super.registerHandlerMethod(handler, method, withPrefix(mapping)); } private RequestMappingInfo withPrefix(RequestMappingInfo mapping) { List<String> newPatterns = getPatterns(mapping); PatternsRequestCondition patterns = new PatternsRequestCondition( newPatterns.toArray(new String[newPatterns.size()])); return new RequestMappingInfo(patterns, mapping.getMethodsCondition(), mapping.getParamsCondition(), mapping.getHeadersCondition(), mapping.getConsumesCondition(), mapping.getProducesCondition(), mapping.getCustomCondition()); } private List<String> getPatterns(RequestMappingInfo mapping) { List<String> newPatterns = new ArrayList<String>(mapping.getPatternsCondition().getPatterns().size()); for (String pattern : mapping.getPatternsCondition().getPatterns()) { newPatterns.add(prefix + pattern); } return newPatterns; } public void setPrefix(String prefix) { this.prefix = prefix; } public String getPrefix() { return prefix; } }