Source for javax.imageio.stream.FileImageOutputStream

   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., 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 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: }