[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: SAX drivers bug ... or feature !
---Ronald Bourret <rbourret@i...> wrote: > > Patrice Bonhomme wrote: > > > I think there is a little problem with AttributeList implementation > within > > some of the SAX drivers (i have tested the following code with my SXP SAX > > driver, the XML4J SAX driver and the AELFRED SAX driver. We are all > giving the > > same results (gosh...). > > > > This code should write the size of each AttributeList that has been read > by > > the parser when it reached the end of the Document. But it always prints > the > > size of the last AtributeList found. > > > > [code snipped] > > It is a good bet that all the parsers are doing what I have done in my > parsers: used a single instance of an AttributeList object, then cleared it > and reused it for each call to startElement. Thus, all the references in > your Vector point to the same object. > > This is specifically allowed by the SAX spec. The documentation for > AttributeList states, "The instance provided will return valid results only > during the scope of the startElement invocation (to save it for future use, > the application must make a copy: the AttributeListImpl helper class > provides a convenient constructor for doing so)." Instead of clearing and reusing the the AttributeList object, wouldn't it be better to create a new attribute list object? If the old Attribute list isn't being referenced, it will be garbage collectible. If the old Attribute list is being reference, it won't be changed out from under the client. This way of doing it seems to offer the best of both worlds. Toivo Lainevool _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com 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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