Re: error trapping
james anderson wrote: > > the xml parser with cl-http signals exceptions. lisp's control model permits > the handler to execute in the dynamic context of the parser which would permit > the caller to decide what to do. on the other hand, i've yet to implement any > continuations: i terminate the parser, but other options are possible. > > one intrinsic problem with java parsers is that the java control model forces > exceptions to unwind from the initiator's dynamic context before the handler > obtains control. this would mean that a callback interface would have to be > proposed, ratified, and implemented. i recall discussions of such a thing when > sax started, but the recollection is vague. SAX has an "ErrorHandler" object which is used to decide how to handle the error ... throwing an exception is the default for fatal (WF) errors, but for all other errors (and warnings) the default is to continue processing. So the effect is similar to the Lisp approach you mentioned, except that the context for the "continue?" decision is less dynamic. - Dave 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/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe 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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