AbstractUserPrincipal


1   /**
2    * Copyright 2003-2006 the original author or authors.
3    * Licensed under the Apache License, Version 2.0 (the "License");
4    * you may not use this file except in compliance with the License.
5    * You may obtain a copy of the License at
6   
7          http://www.apache.org/licenses/LICENSE-2.0
8   
9     * Unless required by applicable law or agreed to in writing, software
10    * distributed under the License is distributed on an "AS IS" BASIS,
11    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12    * See the License for the specific language governing permissions and
13    * limitations under the License.
14    */
15  
16  package com.jdon.security.web;
17  
18  import java.security.Principal  ;
19  
20  import javax.servlet.http.HttpServletRequest  ;
21  import javax.servlet.http.HttpSession  ;
22  
23  import com.jdon.controller.model.Model;
24  import com.jdon.controller.model.ModelIF;
25  import com.jdon.controller.pool.Poolable;
26  import com.jdon.util.Debug;
27  
28  /**
29   *  有关获得登陆用户的任何信�?�。
30   *
31   * @author banq
32   */
33  public abstract class AbstractUserPrincipal implements UserPrincipal, Poolable {
34  
35    public final static String   USERMODEL = "USERMODEL";
36  
37    private final static String   module = AbstractUserPrincipal.class.getName();
38  
39    /**
40     * 将UserModel从登陆的Principal中获�?��?�，
41     * Principal当用户访问被授�?�区域，会由Web容器自动产生。
42     * �?存在HttpSession中，供其它Web层组件使用。
43     * @param request
44     */
45    public ModelIF getUserFromPrincipal(HttpServletRequest   request) {
46      Debug.logVerbose("[JdonFramework]--> enter getUserFromPrincipal", module);
47      Principal   principal = request.getUserPrincipal();
48      if (principal == null) {
49        Debug.logVerbose("[JdonFramework]principal is null, not login by JAAS", module);
50        return null;
51      }
52      String   username = principal.getName();
53      Debug.logVerbose("[JdonFramework]--> find the logined username=" + username, module);
54      HttpSession   session = request.getSession();
55      ModelIF model = (ModelIF) session.getAttribute(USERMODEL);
56      if (model == null) {
57        model = findUserModelIFByName(request, username);
58        session.setAttribute(USERMODEL, model);
59      }
60      return model;
61    }
62  
63    public void saveModeltoSession(HttpServletRequest   request, ModelIF model) {
64      HttpSession   session = request.getSession();
65      session.setAttribute(USERMODEL, model);
66    }
67  
68    /**
69     * 直接从Session获�?�，�?�设Session中已�?存在
70     * @param request HttpServletRequest
71     * @return Model
72     */
73    public ModelIF getUserFromSession(HttpServletRequest   request) {
74      Debug.logVerbose("[JdonFramework]--> enter getUserFromSession", module);
75      HttpSession   session = request.getSession();
76      ModelIF model = (ModelIF) session.getAttribute(USERMODEL);
77      return model;
78    }
79  
80    public ModelIF findUserModelIFByName(HttpServletRequest   request,
81                                              String   key){
82        return findUserModelByName(request, key);
83    }
84    
85    public abstract Model findUserModelByName(HttpServletRequest   request,
86            String   key);
87  }
88
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