trunk/libjava/classpath/gnu/java/net/HeaderFieldHelper.java

   1 /* HeaderFieldHelper.java -- Helps manage headers fields
   2    Copyright (C) 1998, 2003 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 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 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package gnu.java.net;
  40
  41 import java.util.HashMap;
  42 import java.util.Map;
  43 import java.util.Vector;
  44
  45 /**
  46  * This class manages header field keys and values.
  47  *
  48  * @author Aaron M. Renn (arenn@urbanophile.com)
  49  */
  50 public class HeaderFieldHelper
  51 {
  52   private Vector<String> headerFieldKeys;
  53   private Vector<String> headerFieldValues;
  54
  55   public HeaderFieldHelper()
  56   {
  57     this (10);
  58   }
  59
  60   public HeaderFieldHelper (int size)
  61   {
  62     headerFieldKeys = new Vector<String> (size);
  63     headerFieldValues = new Vector<String> (size);
  64   }
  65
  66   public void addHeaderField (String key, String value)
  67   {
  68     headerFieldKeys.addElement (key);
  69     headerFieldValues.addElement (value);
  70   }
  71
  72   public String getHeaderFieldKeyByIndex (int index)
  73   {
  74     String key = null;
  75
  76     try
  77       {
  78         key = headerFieldKeys.elementAt (index);
  79       }
  80     catch (ArrayIndexOutOfBoundsException e)
  81       {
  82       }
  83
  84     return key;
  85   }
  86
  87   public String getHeaderFieldValueByIndex(int index)
  88   {
  89     String value = null;
  90
  91     try
  92       {
  93         value = headerFieldValues.elementAt (index);
  94       }
  95     catch (ArrayIndexOutOfBoundsException e)
  96       {
  97       }
  98
  99     return value;
 100   }
 101
 102   public String getHeaderFieldValueByKey(String key)
 103   {
 104     String value = null;
 105
 106     try
 107       {
 108         value = headerFieldValues.elementAt(headerFieldKeys.indexOf(key));
 109       }
 110     catch (ArrayIndexOutOfBoundsException e)
 111       {
 112       }
 113
 114     return value;
 115   }
 116
 117   public Map<String, String> getHeaderFields()
 118   {
 119     HashMap<String, String> headers = new HashMap<String, String>();
 120     int max = headerFieldKeys.size();
 121
 122     for (int index = 0; index < max; index++)
 123       {
 124         headers.put(headerFieldKeys.elementAt(index),
 125                     headerFieldValues.elementAt(index));
 126       }
 127
 128     return headers;
 129   }
 130
 131   public int getNumberOfEntries()
 132   {
 133     return headerFieldKeys.size();
 134   }
 135
 136 } // class HeaderFieldHelper
 137