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Java > Open Source Codes > org > snipsnap > jsp > ObjectAuth


1 /*
2  * This file is part of "SnipSnap Wiki/Weblog".
3  *
4  * Copyright (c) 2002 Stephan J. Schmidt, Matthias L. Jugel
5  * All Rights Reserved.
6  *
7  * Please visit http://snipsnap.org/ for updates and contact.
8  *
9  * --LICENSE NOTICE--
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License
12  * as published by the Free Software Foundation; either version 2
13  * of the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23  * --LICENSE NOTICE--
24  */
25 package org.snipsnap.jsp;
26
27 import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager;
28 import org.radeox.util.logging.Logger;
29 import org.snipsnap.snip.Snip;
30 import org.snipsnap.user.Roles;
31 import org.snipsnap.user.Security;
32
33 import javax.servlet.jsp.JspException JavaDoc;
34 import javax.servlet.jsp.JspTagException JavaDoc;
35 import javax.servlet.jsp.jstl.core.ConditionalTagSupport;
36 import java.util.StringTokenizer JavaDoc;
37
38
39 public class ObjectAuth extends ConditionalTagSupport {
40   protected Roles roles;
41   protected Snip snip;
42   protected String JavaDoc permission;
43
44   protected boolean invertCheck = false;
45
46   public void setPermission(String JavaDoc permission) {
47     this.permission = permission;
48   }
49
50   public void setSnip(String JavaDoc snip) {
51     try {
52       this.snip = (Snip) ExpressionEvaluatorManager.evaluate("snip", snip, Snip.class, this, pageContext);
53     } catch (JspException JavaDoc e) {
54       Logger.warn("unable to evaluate expression" , e);
55     }
56   }
57
58   public void setRoles(String JavaDoc roles) {
59     StringTokenizer JavaDoc tok = new StringTokenizer JavaDoc(roles, ":,");
60     this.roles = new Roles();
61     while (tok.hasMoreTokens()) {
62       String JavaDoc token = tok.nextToken();
63       this.roles.add(token);
64     }
65   }
66
67   public void setInvert(Boolean JavaDoc value) {
68     invertCheck = value.booleanValue();
69   }
70
71   protected boolean condition() throws JspTagException JavaDoc {
72     if (snip != null) {
73       boolean isTrue = Security.existsPermission(permission, snip, roles);
74       return (invertCheck ? !isTrue : isTrue);
75     } else {
76       return false;
77     }
78   }
79 }
80
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