certificatenode.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: CertificateNode.java,v 1.3 2001/05/07 12:37:22 kunugi Exp $
**
** Copyright (c) 2000-2001 Jeff Gay
** on behalf of ICEMail.org <http://www.icemail.org>
** Copyright (c) 1998-2000 by Timothy Gerard Endres
** 
** This program is free software.
** 
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
*/

package org.icemail.mail.smime;

import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.event.TreeSelectionListener;

import iaik.asn1.ObjectID;
import iaik.asn1.structures.Name;
import iaik.x509.X509Certificate;


public class CertificateNode
  extends DefaultMutableTreeNode
{
  private String     display;

  public
  CertificateNode( X509Certificate cert ) {
    super( cert );
    Name nm = (Name) cert.getSubjectDN();
    this.display = nm.getRDN( ObjectID.commonName );

    if ( this.display == null || this.display.length() == 0 ) {
      this.display = nm.getRDN( ObjectID.organization );
    }

    String email = nm.getRDN( ObjectID.emailAddress );
    if ( email != null && email.length() > 0 ) {
      this.display = this.display + ", " + email;
    }
  }

  public X509Certificate
  getCertificate() {
    return (X509Certificate) this.getUserObject();
  }

  public String
  toString() {
    return this.display;
  }
}