[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: First try with Jumbo
At 12:32 28/01/98 -0500, [a correspondent] wrote [privately] : >Peter: > >I've just tried Jumbo (9801) on my system (Linux 2.0.x and JDK 1.1.3), >with the following command line from the installation directory: > > java jumbo.sgml.Jumbo scene1.sgm > >The program tries to load a few files from absolute paths, then fails >angrily. Here are the first three: > >- "/jumbo/mimetypes.xml" instead of "jumbo/mimetypes.xml" >- "/jumbo/sgml/html/schema.xml" instead of > "jumbo/sgml/html/schema.xml" >- "/scene1.sgm" instead of "scene1.sgm" > This is the sort of thing that saps enthusiasm in the middle of the night :-) (Actually it's still early evening). I have had had *awful* problems with files/URLs under 1.02 (and I don't know it gets much better later). I thought I'd fixed this one. The problem is that not all interpreters/virtual machines seem to behave consistently. I started development with (javac,java) under Solaris; then when I moved to W95 ((javac|jvc)|(java|jview) problems arose. java/jview do not behave consistently - some have backslashes, other have slashes in files/URLs. Another problem is that java.net.URL(URL, String) seems to have bugs in some implementations when URL is the current directory (I think this is where the leading slash comes from). I *thought* I'd fixed it. I'll try to revisit it, though I don't have a local UNIX system which makes it tricky. I will have to wake one up. The number of possible combinations I have to test is: (java95/jview95/Netscape95/MSIE95/javaUX/NetscapeUX/MSIEUX/javaMAC/NetscapeM AC)*(jvc/javac). There are also different flavours of UNIX and some have very poor performance. This is a write-once, debug-many problem. I suggest the following: - if you have W95, then it should behave as I have suggested - if you have UNIX, try: - using full URLs instead of scene1.sgm (I think it should work without the ancillary files) - or load jumbo without a file on the command line and use File | "Open XML" to read in scene1.sgm - or try from a different directory. ("." in the classpath may cause problems) Performance note. JUMBO reads Lark.xml fine, but struggles on my PC with pr.xml (the PR in xml). This fails (StackOverflowError) with java, but works with jview. The navigation is then not too bad. It takes about 15 secs to find all given element types in the document (i.e. tree traversal). None of this is optimised. So - at present - the effective limit of documents is about 100K I suspect (though it's probably more dependent on the node count). This is the price paid at present for making every node displayable, editable, reconfigurable, etc. On a constructive note - I suspect we shall need some sort of configuration file for this. JAR files should help with this sort of thing? P. 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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