usernamefield.java

这是一个用java和xml编写的流媒体服务器管理软件

/*
 * ====================================================================
 * The Vovida Software License, Version 1.0
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 * and "Vovida Open Communication Application Library (VOCAL)" must
 * not be used to endorse or promote products derived from this
 * software without prior written permission. For written
 * permission, please contact [e-mail].
 * 
 * 4. Products derived from this software may not be called "VOCAL", nor
 * may "VOCAL" appear in their name, without prior written
 * permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
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 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
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 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 * 
 */
package vocal.ui;


import java.text.ParseException;

// Class to validated an entered user name and see if it is valid

public class UserNameField extends ValidatingField
{

  public UserNameField()
  {
    super ("User Name Field");
    emptyOk = false;
  }

  public UserNameField(String desc)
  {
    super(desc);

    emptyOk = false;
  }

  public UserNameField(int columns, String desc)
  {
    super(columns, desc);

    emptyOk = false;
  }

  public UserNameField(String text, int columns, String desc)
  {
    super(text, columns, desc);

    emptyOk = false;
  }

  public void verifyContent() throws ParseException
  {

    String contentString = getText();
    char[] content = contentString.toCharArray();

    if (emptyOk && (content.length == 0))
    {
      return;
    }

    // Quite simple. Make sure there are no spaces and no @ signs
    for (int i = 0; i < content.length; i++)
    {

      if (content[i] == ' ')
      {
        throw new ParseException("User name cannot contain a space " 
                + "(did you try to enter more than " 
                + "one user on a single line?", i);
      }

      if (content[i] == '@')
      {
        throw new ParseException("User name should not contain a @ " 
                + "(just name)", i);
      }

    }

  }

  public void setEmptyOk()
  {
    emptyOk = true;
  }

  private boolean emptyOk;

}