[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Announcement: SAX Java Implementation (pre-release)
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...)
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