Source for gnu.CORBA.StreamHolder

   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: }