Source for gnu.java.net.HeaderFieldHelper

   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