libjava/java/nio/channels/Channels.java

   1 /* Channels.java --
   2    Copyright (C) 2002, 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., 59 Temple Place, Suite 330, Boston, MA
  19 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 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package java.nio.channels;
  39
  40 import gnu.java.nio.ChannelInputStream;
  41 import gnu.java.nio.ChannelOutputStream;
  42 import gnu.java.nio.InputStreamChannel;
  43 import gnu.java.nio.OutputStreamChannel;
  44 import java.io.InputStream;
  45 import java.io.OutputStream;
  46 import java.io.Reader;
  47 import java.io.Writer;
  48 import java.nio.charset.Charset;
  49 import java.nio.charset.CharsetDecoder;
  50 import java.nio.charset.CharsetEncoder;
  51
  52 /**
  53  * @since 1.4
  54  */
  55 public final class Channels
  56 {
  57   /**
  58    * Constructs a stream that reads bytes from the given channel.
  59    */
  60   public static InputStream newInputStream(ReadableByteChannel ch)
  61   {
  62     return new ChannelInputStream(ch);
  63   }
  64
  65   /**
  66    * Constructs a stream that writes bytes to the given channel.
  67    */
  68   public static OutputStream newOutputStream(WritableByteChannel ch)
  69   {
  70     return new ChannelOutputStream(ch);
  71   }
  72
  73   /**
  74    * Constructs a channel that reads bytes from the given stream.
  75    */
  76   public static ReadableByteChannel newChannel(InputStream in)
  77   {
  78     return new InputStreamChannel(in);
  79   }
  80
  81   /**
  82    * Constructs a channel that writes bytes to the given stream.
  83    */
  84   public static WritableByteChannel newChannel(OutputStream out)
  85   {
  86     return new OutputStreamChannel (out);
  87   }
  88
  89   /**
  90    * Constructs a reader that decodes bytes from the given channel using the
  91    * given decoder.
  92    */
  93   public static Reader newReader (ReadableByteChannel ch, CharsetDecoder dec,
  94                                   int minBufferCap)
  95   {
  96     throw new Error ("not implemented");
  97   }
  98
  99   /**
 100    * Constructs a reader that decodes bytes from the given channel according to
 101    * the named charset.
 102    *
 103    * @exception UnsupportedCharsetException If no support for the named charset
 104    * is available in this instance of the Java virtual machine.
 105    */
 106   public static Reader newReader (ReadableByteChannel ch, String csName)
 107   {
 108     return newReader (ch, Charset.forName (csName).newDecoder (), -1);
 109   }
 110
 111   /**
 112    * Constructs a writer that encodes characters using the given encoder and
 113    * writes the resulting bytes to the given channel.
 114    */
 115   public static Writer newWriter (WritableByteChannel ch, CharsetEncoder enc,
 116                                   int minBufferCap)
 117   {
 118     throw new Error ("not implemented");
 119   }
 120
 121   /**
 122    * Constructs a writer that encodes characters according to the named charset
 123    * and writes the resulting bytes to the given channel.
 124    *
 125    * @exception UnsupportedCharsetException If no support for the named charset
 126    * is available in this instance of the Java virtual machine.
 127    */
 128   public static Writer newWriter (WritableByteChannel ch,
 129                                   String csName)
 130   {
 131     return newWriter (ch, Charset.forName (csName).newEncoder (), -1);
 132   }
 133 }