001/*
002 * Copyright 2012-2018 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 *      http://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.boot.web.servlet.context;
018
019import javax.servlet.ServletConfig;
020import javax.servlet.ServletContext;
021
022import org.springframework.util.Assert;
023import org.springframework.web.context.ConfigurableWebApplicationContext;
024import org.springframework.web.context.support.ServletContextAwareProcessor;
025
026/**
027 * Variant of {@link ServletContextAwareProcessor} for use with a
028 * {@link ConfigurableWebApplicationContext}. Can be used when registering the processor
029 * can occur before the {@link ServletContext} or {@link ServletConfig} have been
030 * initialized.
031 *
032 * @author Phillip Webb
033 */
034public class WebApplicationContextServletContextAwareProcessor
035                extends ServletContextAwareProcessor {
036
037        private final ConfigurableWebApplicationContext webApplicationContext;
038
039        public WebApplicationContextServletContextAwareProcessor(
040                        ConfigurableWebApplicationContext webApplicationContext) {
041                Assert.notNull(webApplicationContext, "WebApplicationContext must not be null");
042                this.webApplicationContext = webApplicationContext;
043        }
044
045        @Override
046        protected ServletContext getServletContext() {
047                ServletContext servletContext = this.webApplicationContext.getServletContext();
048                return (servletContext != null) ? servletContext : super.getServletContext();
049        }
050
051        @Override
052        protected ServletConfig getServletConfig() {
053                ServletConfig servletConfig = this.webApplicationContext.getServletConfig();
054                return (servletConfig != null) ? servletConfig : super.getServletConfig();
055        }
056
057}