old-autovect-branch/libjava/classpath/gnu/CORBA/StreamHolder.java

   1 /* StreamHolder.java --
   2    Copyright (C) 2005 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 package gnu.CORBA;
  39
  40 import org.omg.CORBA.MARSHAL;
  41 import org.omg.CORBA.NO_IMPLEMENT;
  42 import org.omg.CORBA.TypeCode;
  43 import org.omg.CORBA.portable.InputStream;
  44 import org.omg.CORBA.portable.OutputStream;
  45 import org.omg.CORBA.portable.Streamable;
  46
  47 import java.io.IOException;
  48
  49 /**
  50  * A holder that stores the input stream, from that the holder data
  51  * can be read. There is no way to write the data into this holder.
  52  *
  53  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  54  */
  55 public class StreamHolder
  56   implements Streamable
  57 {
  58   /**
  59    * The stream, holding the data for this holder.
  60    */
  61   protected final InputStream stream;
  62
  63   /**
  64    * Create a holder that will read from the given stream.
  65    *
  66    * @param a_stream a stream.
  67    */
  68   public StreamHolder(InputStream a_stream)
  69   {
  70     stream = a_stream;
  71   }
  72
  73   /**
  74    * This method is not in use, should never be called.
  75    */
  76   public TypeCode _type()
  77   {
  78     throw new NO_IMPLEMENT();
  79   }
  80
  81   /**
  82    * Writes the data from the stored stream into the provided
  83    * output stream till the end of the input stream is reached.
  84    *
  85    * @throws MARSHAL if the IOException is thrown during operation.
  86    */
  87   public void _write(OutputStream output)
  88   {
  89     try
  90       {
  91         int d = stream.read();
  92
  93         while (d >= 0)
  94           {
  95             output.write(d);
  96             d = stream.read();
  97           }
  98       }
  99     catch (IOException ex)
 100       {
 101         MARSHAL m = new MARSHAL();
 102         m.initCause(ex);
 103         m.minor = Minor.CDR;
 104         throw m;
 105       }
 106   }
 107
 108   /**
 109    * This method is not in use, should never be called.
 110    */
 111   public void _read(InputStream input)
 112   {
 113     throw new NO_IMPLEMENT();
 114   }
 115
 116   /**
 117    * Get the input stream that has been passed in constructor.
 118    */
 119   InputStream getInputStream()
 120   {
 121     return stream;
 122   }
 123 }