Java tutorial
/* * 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 javax.servlet.ServletConfig; import javax.servlet.ServletContext; import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; import org.springframework.context.support.StaticApplicationContext; import org.springframework.core.env.ConfigurableEnvironment; import org.springframework.core.io.Resource; import org.springframework.core.io.support.ResourcePatternResolver; import org.springframework.lang.Nullable; import org.springframework.ui.context.Theme; import org.springframework.ui.context.ThemeSource; import org.springframework.ui.context.support.UiApplicationContextUtils; import org.springframework.util.Assert; import org.springframework.web.context.ConfigurableWebApplicationContext; import org.springframework.web.context.ServletConfigAware; import org.springframework.web.context.ServletContextAware; /** * Static {@link org.springframework.web.context.WebApplicationContext} * implementation for testing. Not intended for use in production applications. * * <p>Implements the {@link org.springframework.web.context.ConfigurableWebApplicationContext} * interface to allow for direct replacement of an {@link XmlWebApplicationContext}, * despite not actually supporting external configuration files. * * <p>Interprets resource paths as servlet context resources, i.e. as paths beneath * the web application root. Absolute paths, e.g. for files outside the web app root, * can be accessed via "file:" URLs, as implemented by * {@link org.springframework.core.io.DefaultResourceLoader}. * * <p>In addition to the special beans detected by * {@link org.springframework.context.support.AbstractApplicationContext}, * this class detects a bean of type {@link org.springframework.ui.context.ThemeSource} * in the context, under the special bean name "themeSource". * * @author Rod Johnson * @author Juergen Hoeller * @see org.springframework.ui.context.ThemeSource */ public class StaticWebApplicationContext extends StaticApplicationContext implements ConfigurableWebApplicationContext, ThemeSource { @Nullable private ServletContext servletContext; @Nullable private ServletConfig servletConfig; @Nullable private String namespace; @Nullable private ThemeSource themeSource; public StaticWebApplicationContext() { setDisplayName("Root WebApplicationContext"); } /** * Set the ServletContext that this WebApplicationContext runs in. */ @Override public void setServletContext(@Nullable ServletContext servletContext) { this.servletContext = servletContext; } @Override @Nullable public ServletContext getServletContext() { return this.servletContext; } @Override public void setServletConfig(@Nullable ServletConfig servletConfig) { this.servletConfig = servletConfig; if (servletConfig != null && this.servletContext == null) { this.servletContext = servletConfig.getServletContext(); } } @Override @Nullable public ServletConfig getServletConfig() { return this.servletConfig; } @Override public void setNamespace(@Nullable String namespace) { this.namespace = namespace; if (namespace != null) { setDisplayName("WebApplicationContext for namespace '" + namespace + "'"); } } @Override @Nullable public String getNamespace() { return this.namespace; } /** * The {@link StaticWebApplicationContext} class does not support this method. * @throws UnsupportedOperationException <b>always</b> */ @Override public void setConfigLocation(String configLocation) { throw new UnsupportedOperationException("StaticWebApplicationContext does not support config locations"); } /** * The {@link StaticWebApplicationContext} class does not support this method. * @throws UnsupportedOperationException <b>always</b> */ @Override public void setConfigLocations(String... configLocations) { throw new UnsupportedOperationException("StaticWebApplicationContext does not support config locations"); } @Override public String[] getConfigLocations() { return null; } /** * Register request/session scopes, a {@link ServletContextAwareProcessor}, etc. */ @Override protected void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) { beanFactory.addBeanPostProcessor(new ServletContextAwareProcessor(this.servletContext, this.servletConfig)); beanFactory.ignoreDependencyInterface(ServletContextAware.class); beanFactory.ignoreDependencyInterface(ServletConfigAware.class); WebApplicationContextUtils.registerWebApplicationScopes(beanFactory, this.servletContext); WebApplicationContextUtils.registerEnvironmentBeans(beanFactory, this.servletContext, this.servletConfig); } /** * This implementation supports file paths beneath the root of the ServletContext. * @see ServletContextResource */ @Override protected Resource getResourceByPath(String path) { Assert.state(this.servletContext != null, "No ServletContext available"); return new ServletContextResource(this.servletContext, path); } /** * This implementation supports pattern matching in unexpanded WARs too. * @see ServletContextResourcePatternResolver */ @Override protected ResourcePatternResolver getResourcePatternResolver() { return new ServletContextResourcePatternResolver(this); } /** * Create and return a new {@link StandardServletEnvironment}. */ @Override protected ConfigurableEnvironment createEnvironment() { return new StandardServletEnvironment(); } /** * Initialize the theme capability. */ @Override protected void onRefresh() { this.themeSource = UiApplicationContextUtils.initThemeSource(this); } @Override protected void initPropertySources() { WebApplicationContextUtils.initServletPropertySources(getEnvironment().getPropertySources(), this.servletContext, this.servletConfig); } @Override @Nullable public Theme getTheme(String themeName) { Assert.state(this.themeSource != null, "No ThemeSource available"); return this.themeSource.getTheme(themeName); } }