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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] WORA help required
 I am having a number or problems turning JUMBO into a WORA-compliant animal (WriteOnceReadAnywhere). At present it is WUTROMIL WriteUmpteenTimesReadOnMostIfLucky. Although some of the questions below are not strictly XML-DEV specific, I think they are ones that other Java XML hackers may encounter. If you are a java expert and think the answer is trivial, please mail me directly, else post to this list. [I suggest we do not get into a discussion of the merits or otherwise of WORA.] [An example of the sort of problem is that the latest JUMBO has decided that local files throw a SecurityException 'Codebase 'C:\cdrom\demos\' does not include scene1.sgm (even though the file is there ;-)] I haven't changed the browser (NS4.0) nor the files, but it's just stopped working. This is why there is no release of JUMBO for SGML/XML 97 (it works, but I can't release it on CDROM). JUMBO is both an applet and a standalone application. It therefore has to fit into the following matrix: java jview appletviewer NS3.0 NS4.0 MSIE3 MSIE4 hotjava W95 + + + + + + ? ? Mac ? ? + + + ? UNIX + + + + + ? This is 20 different environments (I have left blank the places where I don't think there is an offering, and ? for where I haven't tried it. '+' means that it has worked in the past when the phase of the moon was right. Specific problems I would be very grateful for information are given below. If there is a WWW site that deals with some of these I'd be grateful for URLs. : A JDK1.02/JDK1.1.x I have refrained from converting to 1.1. since I have been told that not all browsers supported it. Is this still true? Or should I convert now? B Applet/Application. B.1 Is there a function I can call to tell whether I am in an applet or application? (At present I set a static variable in main() or init() but this seems horrible. I tried doing things that would throw SecurityExceptions, but this didn't seem reliable B.2 I use ancillary files located in the *.class directories (e.g icon.gif). A nice extension in JUMBO is a per-class schema.xml file, with additional class information. Since CLASSPATH may contain many components, how can I tell which component was used for the class I am now running, so I can locate these files? C javac/jvc I have problems compiling Lark V097 under javac. It throws a compiler error trying to load Lark.class. (java.io.UTFDataFormatException). This suggest that Lark which may have been compiled with jvc (Tim?) will not load with javac. (I does *run* with java) I won't post all 28 layers of the Stack Trace here but it starts at sun.tools.javac.Main.main(main.java:289) and continues to: java.io.DataInputStream.readUTF(line 326) I was running on W95. I have not tested this on UNIX. D java/jview There are significant differences here, especially with filenames/URLs. There are so many variant errors that I cannot reproduce them in detail. They include: inconsistency with '\' and '/' non elision of '..' in java.net.URL newURL(URL context, String spec) (i.e. the resultant URL may have '../' in the middle; also if context corresponds to "." it seems to be ignored (I think this is java, not jview) Tim Bray posted me one 'fix' from James Clark which included testing for the occurrence of '\'. I have had to do something similar, so the area seems horrible and not very WORA. Is there a set of known kludges out there rather than having to discover these at midnight? Is the problem compiler dependent? version dependent? interpreter dependent? browser dependent? OS dependent? or is it WORN WriteOnceRunNowhere? P. BTW anyone who would actually like to help sort this out in JUMBO ...? :-) Peter Murray-Rust, Director Virtual School of Molecular Sciences, domestic net connection VSMS http://www.nottingham.ac.uk/vsms, Virtual Hyperglossary http://www.venus.co.uk/vhg 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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