Source for java.nio.MappedByteBuffer

   1: /* MappedByteBuffer.java -- 
   2:    Copyright (C) 2002, 2004  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 java.nio;
  40: 
  41: /**
  42:  * @author Michael Koch (konqueror@gmx.de)
  43:  * @since 1.4
  44:  */
  45: public abstract class MappedByteBuffer extends ByteBuffer
  46: {
  47:   MappedByteBuffer (int capacity, int limit, int position, int mark)
  48:   {
  49:     super (capacity, limit, position, mark);
  50:   }
  51:   
  52:   void forceImpl()
  53:   {
  54:   }
  55: 
  56:   public final MappedByteBuffer force ()
  57:   {
  58:     forceImpl();
  59:     return this;
  60:   }
  61:     
  62:   boolean isLoadedImpl()
  63:   {
  64:     load();
  65:     return true;
  66:   }
  67: 
  68:   public final boolean isLoaded ()
  69:   {
  70:     return isLoadedImpl();
  71:   }
  72:     
  73:   void loadImpl()
  74:   {
  75:   }
  76: 
  77:   public final MappedByteBuffer load ()
  78:   {
  79:     loadImpl();
  80:     return this;
  81:   }
  82: 
  83:   void unmapImpl ()
  84:   {
  85:     forceImpl();
  86:   }
  87: 
  88:   protected void finalize()
  89:     throws Throwable
  90:   {
  91:     unmapImpl();
  92:   }
  93: }