Package com.jfinal.ext.plugin.shiro

Source Code of com.jfinal.ext.plugin.shiro.GuestAuthzHandler

/**
* Copyright (c) 2011-2013, dafei 李飞 (myaniu AT gmail DOT com)
*
* 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
*
*      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 com.jfinal.ext.plugin.shiro;

import org.apache.shiro.authz.AuthorizationException;
import org.apache.shiro.authz.UnauthenticatedException;

/**
* 访客访问控制处理器
* @author dafei
*
*/
class GuestAuthzHandler extends AbstractAuthzHandler {
  private static GuestAuthzHandler gah = new GuestAuthzHandler();

  private GuestAuthzHandler(){}

  public static  GuestAuthzHandler me(){
    return gah;
  }

  @Override
    public void assertAuthorized() throws AuthorizationException {
     if (getSubject().getPrincipal() != null) {
              throw new UnauthenticatedException("Attempting to perform a guest-only operation.  The current Subject is " +
                      "not a guest (they have been authenticated or remembered from a previous login).  Access " +
                      "denied.");
          }
  }

}
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