/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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 org.apache.shiro.web.env;

 import org.apache.shiro.env.DefaultEnvironment;

 import org.apache.shiro.mgt.SecurityManager;

 import org.apache.shiro.web.filter.mgt.FilterChainResolver;

 import org.apache.shiro.web.mgt.WebSecurityManager;

 import javax.servlet.ServletContext;

 import java.util.Map;

 /**

  * Default {@link WebEnvironment} implementation based on a backing {@link Map} instance.

  *

  * @since 1.2

  */

 public class DefaultWebEnvironment extends DefaultEnvironment implements MutableWebEnvironment {

     private static final String DEFAULT_FILTER_CHAIN_RESOLVER_NAME = "filterChainResolver";

     private ServletContext servletContext;

     public DefaultWebEnvironment() {

         super();

     }

     public FilterChainResolver getFilterChainResolver() {

         return getObject(DEFAULT_FILTER_CHAIN_RESOLVER_NAME, FilterChainResolver.class);

     }

     public void setFilterChainResolver(FilterChainResolver filterChainResolver) {

         setObject(DEFAULT_FILTER_CHAIN_RESOLVER_NAME, filterChainResolver);

     }

     @Override

     public SecurityManager getSecurityManager() throws IllegalStateException {

         return getWebSecurityManager();

     }

     @Override

     public void setSecurityManager(SecurityManager securityManager) {

         assertWebSecurityManager(securityManager);

         super.setSecurityManager(securityManager);

     }

     public WebSecurityManager getWebSecurityManager() {

         SecurityManager sm = super.getSecurityManager();

         assertWebSecurityManager(sm);

         return (WebSecurityManager)sm;

     }

     public void setWebSecurityManager(WebSecurityManager wsm) {

         super.setSecurityManager(wsm);

     }

     private void assertWebSecurityManager(SecurityManager sm) {

         if (!(sm instanceof WebSecurityManager)) {

             String msg = "SecurityManager instance must be a " + WebSecurityManager.class.getName() + " instance.";

             throw new IllegalStateException(msg);

         }

     }

     public ServletContext getServletContext() {

         return this.servletContext;

     }

     public void setServletContext(ServletContext servletContext) {

         this.servletContext = servletContext;

     }

 }