spring security SecurityWebApplicationContextUtils 源码
spring security SecurityWebApplicationContextUtils 代码
文件路径：/web/src/main/java/org/springframework/security/web/context/support/SecurityWebApplicationContextUtils.java
/*
* Copyright 2002-2020 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.security.web.context.support;
import jakarta.servlet.ServletContext;
import org.springframework.util.Assert;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
/**
* Spring Security extension to Spring's {@link WebApplicationContextUtils}.
*
* @author Rob Winch
*/
public abstract class SecurityWebApplicationContextUtils extends WebApplicationContextUtils {
/**
* Find a unique {@code WebApplicationContext} for this web app: either the root web
* app context (preferred) or a unique {@code WebApplicationContext} among the
* registered {@code ServletContext} attributes (typically coming from a single
* {@code DispatcherServlet} in the current web application).
* <p>
* Note that {@code DispatcherServlet}'s exposure of its context can be controlled
* through its {@code publishContext} property, which is {@code true} by default but
* can be selectively switched to only publish a single context despite multiple
* {@code DispatcherServlet} registrations in the web app.
* @param servletContext ServletContext to find the web application context for
* @return the desired WebApplicationContext for this web app
* @throws IllegalStateException if no WebApplicationContext can be found
* @see #getWebApplicationContext(ServletContext)
* @see ServletContext#getAttributeNames()
*/
public static WebApplicationContext findRequiredWebApplicationContext(ServletContext servletContext) {
WebApplicationContext webApplicationContext = findWebApplicationContext(servletContext);
Assert.state(webApplicationContext != null,
"No WebApplicationContext found: no ContextLoaderListener registered?");
return webApplicationContext;
}
}
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