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From: Knute Johnson <nospam@knutejohnson.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Piggypack Encoding/Decoding on RandomAccessFile
Date: Thu, 03 Nov 2011 16:17:07 -0700
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On 11/3/2011 1:52 PM, markspace wrote:
> 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);
> }
>
> }
>

I like that, I'm going to have to give it a try.

-- 

Knute Johnson