[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Announcement: SAX Java Implementation (pre-release)

  • From: Tyler Baker <tyler@i...>
  • To: Tim Bray <tbray@t...>
  • Date: Sun, 12 Apr 1998 20:33:45 -0400

java sax example
Tim Bray wrote:

> At 05:33 PM 12/04/98 -0400, David Megginson wrote:
> >Here is my question: do we need SAXByteStream and SAXCharacterStream
> >interfaces?  If so, should SAX also come with default implementations
> >for each language?
>
> At the bottom level, a characterStream interface is a good idea.  Having
> constructors for these that take an asciiByteStream, an iso8859ByteStream
> and (I guess) a UTF8InputStream and produce seems awfully convenient. -Tim

This seems like a pretty reasonable idea.  This would also allow parser writers
to provide their own byte to character converters which may in fact be more
efficient than the sun.io.ByteToCharConverter and sun.io.CharToByteConverter
classes which do all of this stuff now in the JDK.  These implementations are
undocumented which is another problem that a CharacterStream interface might be
nice to have as an alternative to the Reader classes.  Of course a character
stream interface could of course delegate to a Reader class if the parser writer
chose two which would be a relatively low cost in performance considering the
Reader classes are all screwed up anyways IMHO.  In this particular case, a
CharacterStream implementation may take a Reader object as an argument and the
rest is just delegation.

Most poeple already know that the I/O implementation of the JDK is not too great
as it is, for example every time you read a single character from the Reader
class, it instantiates a new Array object as an argument necessary for delegating
to another read method.  Why things work this way in the Reader class I don't
really know other than possibly the person who wrote it was either lazy or else
forgot to improve the implementation at a later time.

I think Tim's idea is a good one...

Tyler


xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo@i... the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@i... the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@i...)


PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
 

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.


Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.