/* * Copyright 2002-2017 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.context.support;import java.util.HashSet;import java.util.Set;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletRequestWrapper;import org.springframework.lang.Nullable;import org.springframework.util.Assert;import org.springframework.web.context.WebApplicationContext;/** * HttpServletRequest decorator that makes all Spring beans in a * given WebApplicationContext accessible as request attributes, * through lazy checking once an attribute gets accessed. * * @author Juergen Hoeller * @since 2.5 */public class ContextExposingHttpServletRequest extends HttpServletRequestWrapper { private final WebApplicationContext webApplicationContext; @Nullable private final Set<String> exposedContextBeanNames; @Nullable private Set<String> explicitAttributes; /** * Create a new ContextExposingHttpServletRequest for the given request. * @param originalRequest the original HttpServletRequest * @param context the WebApplicationContext that this request runs in */ public ContextExposingHttpServletRequest(HttpServletRequest originalRequest, WebApplicationContext context) { this(originalRequest, context, null); } /** * Create a new ContextExposingHttpServletRequest for the given request. * @param originalRequest the original HttpServletRequest * @param context the WebApplicationContext that this request runs in * @param exposedContextBeanNames the names of beans in the context which * are supposed to be exposed (if this is non-null, only the beans in this * Set are eligible for exposure as attributes) */ public ContextExposingHttpServletRequest(HttpServletRequest originalRequest, WebApplicationContext context, @Nullable Set<String> exposedContextBeanNames) { super(originalRequest); Assert.notNull(context, "WebApplicationContext must not be null"); this.webApplicationContext = context; this.exposedContextBeanNames = exposedContextBeanNames; } /**