Groups > comp.lang.java.programmer > #9490

Re: Piggypack Encoding/Decoding on RandomAccessFile

From	Jan Burse <janburse@fastmail.fm>
Newsgroups	comp.lang.java.programmer
Subject	Re: Piggypack Encoding/Decoding on RandomAccessFile
Date	2011-11-04 02:28 +0100
Organization	albasani.net
Message-ID	<j8vf39$4a6$1@news.albasani.net> (permalink)
References	<j8ulue$or4$1@news.albasani.net> <j8uq9l$17l$1@dont-email.me> <j8urao$53e$1@news.albasani.net> <j8vcaa$tnj$1@dont-email.me>

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Eric Sosman schrieb:
> Elsethread you mention that RandomAccessFile provides neither
> InputStream nor OutputStream.  If you think about this a bit, you'll
> see it's a natural consequence of the "Random" part: a Stream provides
> the abstraction of a linear sequence of things, and does not admit of
> leaping forward or backward to unrelated positions.  Yes, there are
> skip() and mark() and reset(), but I think you'll agree these are of
> a different character than "read bytes 3000-3999, then 10000-10999,
> then 936-22728."  Streams are sequential; Random isn't.

It seems that the FileInputStream reacts on the what is
done with the underlying RandomAccessFile. Since it is
not buffering and since it shares the same file descriptor.

But I have only done a small testing. Something allong:

    Writing "Hello World!" to a file.

    Random access opening the file.

    Doing a FileInputStream on the random access
    file via the file descriptor.

    Seeking the random access file to position 6.

    Reading from FileInputStream, and you get "World!"

So they are somehow interlocked.

Bye

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Thread

Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-03 19:18 +0100
  Re: Piggypack Encoding/Decoding on RandomAccessFile Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-11-03 14:32 -0500
    Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-03 20:50 +0100
      Re: Piggypack Encoding/Decoding on RandomAccessFile markspace <-@.> - 2011-11-03 13:52 -0700
        Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-03 23:13 +0100
        Re: Piggypack Encoding/Decoding on RandomAccessFile Knute Johnson <nospam@knutejohnson.com> - 2011-11-03 16:17 -0700
      Re: Piggypack Encoding/Decoding on RandomAccessFile Lew <lewbloch@gmail.com> - 2011-11-03 13:58 -0700
      Re: Piggypack Encoding/Decoding on RandomAccessFile Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-03 20:40 -0400
        Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-04 02:28 +0100
          Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-04 03:06 +0100
            Re: Piggypack Encoding/Decoding on RandomAccessFile Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-04 08:05 -0400
              Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-04 16:12 +0100
        Re: Piggypack Encoding/Decoding on RandomAccessFile rossum <rossum48@coldmail.com> - 2011-11-04 16:54 +0000
  Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-03 23:24 +0100
  Re: Piggypack Encoding/Decoding on RandomAccessFile Arne Vajhøj <arne@vajhoej.dk> - 2011-11-03 20:14 -0400
  Re: Piggypack Encoding/Decoding on RandomAccessFile Roedy Green <see_website@mindprod.com.invalid> - 2011-11-03 21:56 -0700
    [OT] Conspiracy theories are BS (Was: Piggypack Encoding/Decoding on RandomAccessFile) Lew <lewbloch@gmail.com> - 2011-11-04 10:50 -0700
      Re: [OT] Conspiracy theories are BS (Was: Piggypack Encoding/Decoding on RandomAccessFile) Arne Vajhøj <arne@vajhoej.dk> - 2011-11-04 21:07 -0400
      Re: [OT] Conspiracy theories are BS (Was: Piggypack Encoding/Decoding on RandomAccessFile) Roedy Green <see_website@mindprod.com.invalid> - 2011-11-05 20:21 -0700
      Re: [OT] Conspiracy theories are BS (Was: Piggypack Encoding/Decoding on RandomAccessFile) Roedy Green <see_website@mindprod.com.invalid> - 2011-11-05 20:24 -0700
        Re: [OT] Conspiracy theories are BS (Was: Piggypack Encoding/Decoding on RandomAccessFile) Jan Burse <janburse@fastmail.fm> - 2011-11-06 10:36 +0100
      Re: [OT] Conspiracy theories are BS (Was: Piggypack Encoding/Decoding on RandomAccessFile) Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-11-06 14:16 -0600
  Re: Piggypack Encoding/Decoding on RandomAccessFile Stanimir Stamenkov <s7an10@netscape.net> - 2011-11-05 16:51 +0200
    Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-05 16:27 +0100
      Re: Piggypack Encoding/Decoding on RandomAccessFile Lew <lewbloch@gmail.com> - 2011-11-05 10:03 -0700
        Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-05 19:37 +0100
          Re: Piggypack Encoding/Decoding on RandomAccessFile Lew <lewbloch@gmail.com> - 2011-11-05 13:25 -0700
        Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-05 19:47 +0100
        Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-05 19:56 +0100
          Re: Piggypack Encoding/Decoding on RandomAccessFile Lew <lewbloch@gmail.com> - 2011-11-05 13:29 -0700
            Re: Piggypack Encoding/Decoding on RandomAccessFile Jan Burse <janburse@fastmail.fm> - 2011-11-06 10:42 +0100

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