Source for gnu.inet.http.ByteArrayRequestBodyWriter

   1: /*
   2:  * ByteArrayRequestBodyWriter.java
   3:  * Copyright (C) 2004 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.http;
  40: 
  41: /**
  42:  * A simple request body writer using a byte array.
  43:  *
  44:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  45:  */
  46: public class ByteArrayRequestBodyWriter
  47:   implements RequestBodyWriter
  48: {
  49: 
  50:   /**
  51:    * The content.
  52:    */
  53:   protected byte[] content;
  54: 
  55:   /**
  56:    * The position within the content at which the next read will occur.
  57:    */
  58:   protected int pos;
  59: 
  60:   /**
  61:    * Constructs a new byte array request body writer with the specified
  62:    * content.
  63:    * @param content the content buffer
  64:    */
  65:   public ByteArrayRequestBodyWriter(byte[] content)
  66:   {
  67:     this.content = content;
  68:     pos = 0;
  69:   }
  70: 
  71:   /**
  72:    * Returns the total number of bytes that will be written in a single pass
  73:    * by this writer.
  74:    */
  75:   public int getContentLength()
  76:   {
  77:     return content.length;
  78:   }
  79: 
  80:   /**
  81:    * Initialises the writer.
  82:    * This will be called before each pass.
  83:    */
  84:   public void reset()
  85:   {
  86:     pos = 0;
  87:   }
  88: 
  89:   /**
  90:    * Writes body content to the supplied buffer.
  91:    * @param buffer the content buffer
  92:    * @return the number of bytes written
  93:    */
  94:   public int write(byte[] buffer)
  95:   {
  96:     int len = content.length - pos;
  97:     len = (buffer.length < len) ? buffer.length : len;
  98:     if (len > -1)
  99:       {
 100:         System.arraycopy(content, pos, buffer, 0, len);
 101:         pos += len;
 102:       }
 103:     return len;
 104:   }
 105:   
 106: }