001    /* FileImageOutputStream.java --
002       Copyright (C) 2004  Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package javax.imageio.stream;
040    
041    import java.io.File;
042    import java.io.FileNotFoundException;
043    import java.io.IOException;
044    import java.io.RandomAccessFile;
045    
046    /**
047     * @author Michael Koch (konqueror@gmx.de)
048     */
049    public class FileImageOutputStream extends ImageOutputStreamImpl
050    {
051      private RandomAccessFile file;
052    
053      public FileImageOutputStream(File file)
054        throws FileNotFoundException, IOException
055      {
056        if (file == null)
057          throw new IllegalArgumentException("file may not be null");
058    
059        // Do security check.
060        file.canRead();
061    
062        this.file = new RandomAccessFile(file, "r");
063      }
064    
065      public FileImageOutputStream(RandomAccessFile file)
066      {
067        if (file == null)
068          throw new IllegalArgumentException("file may not be null");
069    
070        this.file = file;
071      }
072    
073      public void close()
074        throws IOException
075      {
076        file.close();
077      }
078    
079      public long length()
080      {
081        try
082          {
083            return file.length();
084          }
085        catch (IOException e)
086          {
087            return -1L;
088          }
089      }
090    
091      public int read()
092        throws IOException
093      {
094        checkClosed();
095    
096        setBitOffset(0);
097        return file.read();
098      }
099    
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    }