/*

  * 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.filter.mgt;

 import org.apache.shiro.util.ClassUtils;

 import org.apache.shiro.web.filter.authc.*;

 import org.apache.shiro.web.filter.authz.*;

 import org.apache.shiro.web.filter.session.NoSessionCreationFilter;

 import javax.servlet.Filter;

 import javax.servlet.FilterConfig;

 import javax.servlet.ServletException;

 import java.util.LinkedHashMap;

 import java.util.Map;

 /**

  * Enum representing all of the default Shiro Filter instances available to web applications.  Each filter instance is

  * typically accessible in configuration the {@link #name() name} of the enum constant.

  *

  * @since 1.0

  */

 public enum DefaultFilter {

     anon(AnonymousFilter.class),

     authc(FormAuthenticationFilter.class),

     authcBasic(BasicHttpAuthenticationFilter.class),

     logout(LogoutFilter.class),

     noSessionCreation(NoSessionCreationFilter.class),

     perms(PermissionsAuthorizationFilter.class),

     port(PortFilter.class),

     rest(HttpMethodPermissionFilter.class),

     roles(RolesAuthorizationFilter.class),

     ssl(SslFilter.class),

     user(UserFilter.class);

     private final Class<? extends Filter> filterClass;

     private DefaultFilter(Class<? extends Filter> filterClass) {

         this.filterClass = filterClass;

     }

     public Filter newInstance() {

         return (Filter) ClassUtils.newInstance(this.filterClass);

     }

     public Class<? extends Filter> getFilterClass() {

         return this.filterClass;

     }

     public static Map<String, Filter> createInstanceMap(FilterConfig config) {

         Map<String, Filter> filters = new LinkedHashMap<String, Filter>(values().length);

         for (DefaultFilter defaultFilter : values()) {

             Filter filter = defaultFilter.newInstance();

             if (config != null) {

                 try {

                     filter.init(config);

                 } catch (ServletException e) {

                     String msg = "Unable to correctly init default filter instance of type " +

                             filter.getClass().getName();

                     throw new IllegalStateException(msg, e);

                 }

             }

             filters.put(defaultFilter.name(), filter);

         }

         return filters;

     }

 }