libjava/javax/imageio/stream/FileImageOutputStream.java

   1 /* FileImageOutputStream.java --
   2    Copyright (C) 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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 javax.imageio.stream;
  40
  41 import java.io.File;
  42 import java.io.FileNotFoundException;
  43 import java.io.IOException;
  44 import java.io.RandomAccessFile;
  45
  46 /**
  47  * @author Michael Koch (konqueror@gmx.de)
  48  */
  49 public class FileImageOutputStream extends ImageOutputStreamImpl
  50 {
  51   private RandomAccessFile file;
  52
  53   public FileImageOutputStream(File file)
  54     throws FileNotFoundException, IOException
  55   {
  56     if (file == null)
  57       throw new IllegalArgumentException("file may not be null");
  58
  59     // Do security check.
  60     file.canRead();
  61
  62     this.file = new RandomAccessFile(file, "r");
  63   }
  64
  65   public FileImageOutputStream(RandomAccessFile file)
  66   {
  67     if (file == null)
  68       throw new IllegalArgumentException("file may not be null");
  69
  70     this.file = file;
  71   }
  72
  73   public void close()
  74     throws IOException
  75   {
  76     file.close();
  77   }
  78
  79   public long length()
  80   {
  81     try
  82       {
  83         return file.length();
  84       }
  85     catch (IOException e)
  86       {
  87         return -1L;
  88       }
  89   }
  90
  91   public int read()
  92     throws IOException
  93   {
  94     checkClosed();
  95
  96     setBitOffset(0);
  97     return file.read();
  98   }
  99
 100   public int read(byte[] data, int offset, int len)
 101     throws IOException
 102   {
 103     checkClosed();
 104
 105     setBitOffset(0);
 106     return file.read(data, offset, len);
 107   }
 108
 109   public void seek(long position)
 110     throws IOException
 111   {
 112     super.seek(position);
 113     file.seek(position);
 114   }
 115
 116   public void write(byte[] data, int offset, int len)
 117     throws IOException
 118   {
 119     checkClosed();
 120
 121     flushBits();
 122     file.write(data, offset, len);
 123   }
 124
 125   public void write(int value)
 126     throws IOException
 127   {
 128     checkClosed();
 129
 130     // FIXME: Flush pending bits.
 131     file.write(value);
 132   }
 133 }