old-autovect-branch/libjava/classpath/gnu/CORBA/CDR/BufferredCdrInput.java

   1 /* BufferredCdrInput.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 public class BufferredCdrInput
  48   extends AbstractCdrInput
  49   implements gnuValueStream
  50 {
  51   /**
  52    * Use serialVersionUID for interoperability.
  53    */
  54   private static final long serialVersionUID = 1;
  55
  56   /**
  57    * The byte array input stream to read data from.
  58    */
  59   public final AligningInput buffer;
  60
  61   /**
  62    * Creates the CDR input stream that reads from the given buffer
  63    * array.
  64    *
  65    * @param a_buffer an array to read from.
  66    */
  67   public BufferredCdrInput(byte[] a_buffer)
  68   {
  69     buffer = new AligningInput(a_buffer);
  70     setInputStream(buffer);
  71   }
  72
  73   /**
  74    * Set the alignment offset, if the index of the first byte in the
  75    * stream is different from 0.
  76    */
  77   public void setOffset(int offset)
  78   {
  79     buffer.setOffset(offset);
  80   }
  81
  82   /**
  83    * Skip several bytes, aligning the internal pointer on the
  84    * selected boundary.
  85    */
  86   public void align(int alignment)
  87   {
  88     buffer.align(alignment);
  89   }
  90
  91   /**
  92    * Mark the current position.
  93    * @param ahead
  94    */
  95   public synchronized void mark(int ahead)
  96   {
  97     buffer.mark(ahead);
  98   }
  99
 100   /**
 101    * Checks if marking is supported.
 102    * @return
 103    */
 104   public boolean markSupported()
 105   {
 106     return buffer.markSupported();
 107   }
 108
 109   /**
 110    * Resets the stream to the previously marked position.
 111    */
 112   public void reset()
 113   {
 114     buffer.reset();
 115     setInputStream(buffer);
 116   }
 117
 118   /**
 119    * Get the current position in the buffer.
 120    *
 121    * @return The position in the buffer, taking offset into consideration.
 122    */
 123   public int getPosition()
 124   {
 125     return buffer.getPosition();
 126   }
 127
 128   /**
 129    * Jump to the given position, taking offset into consideration.
 130    */
 131   public void seek(int position)
 132   {
 133     buffer.seek(position);
 134     setInputStream(buffer);
 135   }
 136
 137   /**
 138    * Get the associated RunTime.
 139    */
 140   public gnuRuntime getRunTime()
 141   {
 142     return runtime;
 143   }
 144
 145   /**
 146    * Replace the instance of RunTime.
 147    */
 148   public void setRunTime(gnuRuntime a_runtime)
 149   {
 150     runtime = a_runtime;
 151   }
 152
 153 }