[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] com.sun,xml.parser LexicalEventListener improvements
I believe that the class LexicalEventListener is the proposed basis for the new javax.xml extension. In private conversation with Dave Brownwell of Sun Microsystems I made the suggestions below. While refusing these ideas Dave suggested that I poll the users on XML-DEV to determine their reactions. I hope you will agree with these suggestions and contact Dave via xml-feedback@j.... 1. The startElement() method should indicate if it is an empty element. i.e. whether the element ends with a /> tag or not. 2. The proposed LexicalEventListenser interface should have new methods startPCDATA() and endPCDATA(). Calls to these methods would bracket calls to the current characters(...) method. The LexicalEventListener interface already contains bracketing calls for start/endCDATA - why the inconsistency? <ALTERNATIVE> Better yet, the characters(..) method should be split into two: CDATA(...) and PCDATA(..). The two method sets would then be startPCDATA(), PCDATA()*, endPCDATA. ditto for CDATA. </ALTERNATIVE> <ALTERNATIVE> Alternatively a single set: startCharacters(), characters(), endCharacters() could be used with a flag on startCharacters to indicate parsed or unparsed text. </ALTERNATIVE> Dave argues that these method calls may be implemented by writing an event filter to restructure the events as required. By this logic, current extensions to LexicalEventListener are all equally pointless. Was the addition of the start/endCDATA methods added solely for his convenience in implementing XMLDocumentBuilder? Using the same argument they should not be cluttering up the new interface. My argument is that the new XML parsing facilities should not be skewed by the need of one application (e.g. building Dom models). This is best achieved by structuring lexical events for ALL syntactic structures. The current LexicalEventListener interface is a step in the right direction but is not complete. Peter Wilson 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 (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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