Source for gnu.inet.smtp.ParameterList

   1: /*
   2:  * ParameterList.java
   3:  * Copyright (C) 2003 The Free Software Foundation
   4:  * 
   5:  * This file is part of GNU inetlib, a library.
   6:  * 
   7:  * GNU inetlib is free software; you can redistribute it and/or modify
   8:  * it under the terms of the GNU General Public License as published by
   9:  * the Free Software Foundation; either version 2 of the License, or
  10:  * (at your option) any later version.
  11:  * 
  12:  * GNU inetlib is distributed in the hope that it will be useful,
  13:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15:  * GNU General Public License for more details.
  16:  * 
  17:  * You should have received a copy of the GNU General Public License
  18:  * along with this library; if not, write to the Free Software
  19:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20:  *
  21:  * Linking this library statically or dynamically with other modules is
  22:  * making a combined work based on this library.  Thus, the terms and
  23:  * conditions of the GNU General Public License cover the whole
  24:  * combination.
  25:  *
  26:  * As a special exception, the copyright holders of this library give you
  27:  * permission to link this library with independent modules to produce an
  28:  * executable, regardless of the license terms of these independent
  29:  * modules, and to copy and distribute the resulting executable under
  30:  * terms of your choice, provided that you also meet, for each linked
  31:  * independent module, the terms and conditions of the license of that
  32:  * module.  An independent module is a module which is not derived from
  33:  * or based on this library.  If you modify this library, you may extend
  34:  * this exception to your version of the library, but you are not
  35:  * obliged to do so.  If you do not wish to do so, delete this
  36:  * exception statement from your version.
  37:  */
  38: 
  39: package gnu.inet.smtp;
  40: 
  41: import java.util.ArrayList;
  42: import java.util.List;
  43: 
  44: /**
  45:  * A list of ESMTP parameters.
  46:  *
  47:  * @author <a href="mailto:dog@gnu.org">Chris Burdess</a>
  48:  */
  49: public final class ParameterList
  50: {
  51: 
  52:   private List parameters = new ArrayList();
  53: 
  54:   /**
  55:    * Returns the number of parameters in the list.
  56:    */
  57:   public int size()
  58:   {
  59:     synchronized (parameters)
  60:       {
  61:         return parameters.size();
  62:       }
  63:   }
  64:   
  65:   /**
  66:    * Returns the parameter at the specified index.
  67:    */
  68:   public Parameter get(int index)
  69:   {
  70:     synchronized (parameters)
  71:       {
  72:         return(Parameter) parameters.get(index);
  73:       }
  74:   }
  75: 
  76:   /**
  77:    * Adds a new parameter to the list.
  78:    */
  79:   public void add(Parameter parameter)
  80:   {
  81:     synchronized (parameters)
  82:       {
  83:         parameters.add(parameter);
  84:       }
  85:   }
  86: 
  87:   /**
  88:    * String form.
  89:    */
  90:   public String toString()
  91:   {
  92:     synchronized (parameters)
  93:       {
  94:         int len = parameters.size();
  95:         if (len == 0)
  96:           {
  97:             return "";
  98:           }
  99:         StringBuffer buffer = new StringBuffer();
 100:         buffer.append(parameters.get(0));
 101:         for (int i = 1; i < len; i++)
 102:           {
 103:             buffer.append(' ');
 104:             buffer.append(parameters.get(i));
 105:           }
 106:         return buffer.toString();
 107:       }
 108:   }
 109: 
 110: }