[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Piccolo Java SAX parser and others in the wild?
Elliotte Rusty Harold wrote: >At 10:27 AM -0800 2/22/04, Dennis Sosnoski wrote: > > > >>Can you mention what the main flaws are for Piccolo? I've seen a >>number of companies using it, and from what I remember it's also the >>basis of the parser used by BEA's NetBeans (now part of Apache, so >>that may be changing). Many people would consider BEA's main XML >>infrastructure project to be serious work. :-) >> >> > >... But several problems with Piccolo include: > >1. Inability to recognize ignorable white space. >2. Use of non-standard ENUMERATION attribute type instead of NMTOKEN >3. Failure to handle document type declarations that only contain a >root element name >4. Frequent throwing of ArrayIndexOutOfBoundsExceptions when >encountering various kinds of well-formedness errors >5. It treats <name/> and <name></name> differently. For <name></name> >it calls characters() between startElement and endElement and sets >length to 0. > >Arguably 1 and 5 are acceptable. I'd love to hear peoples' opinions >about 5. Is this legitimate? > > > Your standards are perhaps a tad more stringent than those of many companies working with XML. AFAIK "ignorable white space" is only defined for validating parsers, so I don't see how there's anything "arguable" about Piccolo not reporting it (item 1 on your list). Likewise with item 5 - I've seen nothing in the SAX specification that says a parser can't make a zero-length characters() report whenever it feels like it. 2-4 all look like real bugs, though I'd suspect they only effect a tiny minority of users. I haven't even seen a single application that actually makes use of attribute types, for example. It's great that you're tracking down these types of flaws, though, and I hope the parser writers correct them. - Dennis
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