RunAsAccessInterceptor


1   /**
2    * EasyBeans
3    * Copyright (C) 2006 Bull S.A.S.
4    * Contact: easybeans@objectweb.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or any later version.
10   *
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19   * USA
20   *
21   * --------------------------------------------------------------------------
22   * $Id: RunAsAccessInterceptor.java 1121 2006-09-27 08:51:06Z benoitf $
23   * --------------------------------------------------------------------------
24   */
25  
26  package org.objectweb.easybeans.security.interceptors;
27  
28  import javax.security.auth.Subject  ;
29  
30  import org.objectweb.easybeans.api.EasyBeansInterceptor;
31  import org.objectweb.easybeans.api.EasyBeansInvocationContext;
32  import org.objectweb.easybeans.security.propagation.context.SecurityCurrent;
33  
34  /**
35   * Push run-as subject for new calls.
36   * @author Florent Benoit
37   */
38  public class RunAsAccessInterceptor implements EasyBeansInterceptor {
39  
40      /**
41       * Adds run-as role before invoking next methods.
42       * @param invocationContext context with useful attributes on the current
43       *        invocation
44       * @return result of the next invocation (to chain interceptors)
45       * @throws Exception if interceptor fails
46       */
47      public Object   intercept(final EasyBeansInvocationContext invocationContext) throws Exception   {
48          Subject   runAsSubject = invocationContext.getFactory().getBeanInfo().getSecurityInfo().getRunAsSubject();
49          Subject   previousSubject = SecurityCurrent.getCurrent().getSecurityContext().enterRunAs(runAsSubject);
50          try {
51              return invocationContext.proceed();
52          } finally {
53              SecurityCurrent.getCurrent().getSecurityContext().endsRunAs(previousSubject);
54          }
55      }
56  }
57
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