libjava/classpath/gnu/CORBA/CDR/cdrBufInput.java

   1 /* cdrBufInput.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
  39 package gnu.CORBA.CDR;
  40
  41
  42 /**
  43  * The CDR input stream that reads data from the byte buffer.
  44  *
  45  * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
  46  *
  47  * TODO character encoding. Now the encoding can be set, but it is ignored.
  48  * If you take this task, scan 'TODO character encoding' for
  49  * relevant places.
  50  */
  51 public class cdrBufInput
  52   extends cdrInput
  53 {
  54   /**
  55    * The byte array input stream to read data from.
  56    */
  57   public final aligningInputStream buffer;
  58
  59   /**
  60    * Creates the CDR input stream that reads from the given buffer
  61    * array.
  62    *
  63    * @param a_buffer an array to read from.
  64    */
  65   public cdrBufInput(byte[] a_buffer)
  66   {
  67     buffer = new aligningInputStream(a_buffer);
  68     setInputStream(buffer);
  69   }
  70
  71   /**
  72    * Set the alignment offset, if the index of the first byte in the
  73    * stream is different from 0.
  74    */
  75   public void setOffset(int offset)
  76   {
  77     buffer.setOffset(offset);
  78   }
  79
  80   /**
  81    * Skip several bytes, aligning the internal pointer on the
  82    * selected boundary.
  83    */
  84   public void align(int alignment)
  85   {
  86     buffer.align(alignment);
  87   }
  88
  89   /**
  90    * Mark the current position.
  91    * @param ahead
  92    */
  93   public synchronized void mark(int ahead)
  94   {
  95     buffer.mark(ahead);
  96   }
  97
  98   /**
  99    * Checks if marking is supported.
 100    * @return
 101    */
 102   public boolean markSupported()
 103   {
 104     return buffer.markSupported();
 105   }
 106
 107   /**
 108    * Resets the stream to the previously marked position.
 109    */
 110   public void reset()
 111   {
 112     buffer.reset();
 113     setInputStream(buffer);
 114   }
 115 }