Re: Piggypack Encoding/Decoding on RandomAccessFile

From:

markspace <-@.>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 03 Nov 2011 13:52:11 -0700

Message-ID:

<j8uuts$1pi$1@dont-email.me>

On 11/3/2011 12:50 PM, Jan Burse wrote:

Joshua Cranmer schrieb:

The "standard way" (at least, all of the use cases I've ever had for
RandomAccessFile) effectively uses the methods that are associated with
java.io.DataInput to read data: read(byte[]), and read*().

I would like to use an arbirary encoding/decoding on top of the
byte stream to get a character stream. But since RandomAccessFile
does not implement InputStream/OutputStream, I cannot create
a InputStreamReader/OutputStreamWrite on top.

Bye

5 minutes, untested:

package quicktest;

import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;

/**
  *
  * @author Brenden
  */
public class RndFileStream extends InputStream {

    private final RandomAccessFile raf;

    public RndFileStream(RandomAccessFile raf) {
       this.raf = raf;
    }

    @Override
    public int read() throws IOException {
       return raf.read();
    }

    public void seek( long pos ) throws IOException {
       raf.seek(pos);
    }

}