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JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by CassMan >> Wed, 3 Oct 2007 14:45:31 GMT
Hi again,
I have a program which firsts creates an XML tree and then writes it to a file using the WriteToFile method. This, obviously, creates a physical file at the directory that is specified as a parameter. However, i don't like having this as a physical, permanent file as it is only needed temporarily whilst the program is running.
Is there any command for erasing a document at the end of a program? The ' delete <File> ' command simply deletes the reference to it - the file still exists.
The File is actually a JadeXMLDocument btw.
Thanks,
Rich
Re: JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by Torrie Moore >> Wed, 3 Oct 2007 21:13:16 GMT
Hi Rich
If you have a file on disk, it can be deleted using the File::purge method. e.g.
vars
oFile : File;
begin
create oFile transient;
oFile.fileName := "c:\temp\clientpic2143.2.jpg";
// Remove this file from disk.
oFile.purge;
epilog
delete oFile;
Regards
Torrie
Re: JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by CassMan >> Thu, 4 Oct 2007 9:05:40 GMT
Hi Torrie,
I have seen the purge method used a few times but never really understood what it did! :-/. Can this be used with JadeXMLDocuments? Or is it just instances of File?
Regards,
Rich x
Re: JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by
CassMan >> Thu, 4 Oct 2007 15:47:50 GMT
I have a further question.
I need to send the XML over to a gateway. The first line of the xml is:
<GovTalkMessage xmlns="
http://www.govtalk.gov.uk/CM/envelope">
When i have this typed out in a file, and call "parseFile", this works perfectly ok. However, if i create the elements myself then the output is fine and legal, but it still throws the following error:
<Error>
<RaisedBy>System</RaisedBy>
<Number>1001</Number>
<Type>fatal</Type>
<Text>The element 'Header' in namespace '
http://www.govtalk.gov.uk/CM/envelope' has incomplete content. List of possible elements expected: 'MessageDetails' in namespace '
http://www.govtalk.gov.uk/CM/envelope'.
</Text>
<Location/>
</Error>
</GovTalkErrors>
</GovTalkDetails>
<Body></Body>
</GovTalkMessage>
Does anybody know how to fix this error?! I know it must have something to do with the namespace. I am using
addElementNS('
http://www.govtalk.gov.uk/CM/envelope', "GovTalkMessage").
It creates it fine, but does not work.
Any ideas?
Rich
Re: JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by
Dave Patrick >> Fri, 5 Oct 2007 1:33:09 GMT
Rich,
Are you trying to use the addElementNS to set the "xmlns=" portion of your XML header? This doesn't work quite the way the JADE documentation would have you believe (in fact, it doesn't work at all).
To get a xmlns statement in your XML header, you need to use addAttribute instead - so if you had something like
xmlDoc.addElementNS("
http://www.govtalk.gov.uk/CM/envelope", "GovTalkMessage")
you actually need something like
element := xmlDoc.addElement("GovTalkMessage"); element.addAttribute("xmlns", "
http://www.govtalk.gov.uk/CM/envelope");
This will produce a header of
<GovTalkMessage xmlns="
http://www.govtalk.gov.uk/CM/envelope">
Re: JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by
CassMan >> Wed, 17 Oct 2007 13:21:58 GMT
Hi John,
Thanks for the info. That worked fine
.
Regarding the original problem, i researched into not using temporary XML files, as Dave suggested and i managed to do this using simply global strings. The reason i initially believe i needed temp files is that i needed to use the files at different stages, but not after the program had been run....
Cheers,
Cass
Re: JadeXMLDocument delete
Posted: Fri Aug 07, 2009 1:12 pm
by ConvertFromOldNGs
by John Munro >> Thu, 4 Oct 2007 19:08:09 GMT
File::purge deletes the file represented by the File object from the hard drive.
I imagine it's not named 'delete' because that keyword is already used in the context of deleting objects.
Purge can delete any file (assuming they're not read-only or in use and you have file access permissions), not just XML documents.
Just to be clear, JadeXMLDocument is a class that represents an XML tree in memory. When you call writeToFile, it creates a file on the hard drive that represents the XML. The JadeXMLDocument object and the file on the hard drive aren't really connected - deleting the object using the delete keyword doesn't affect the file and deleting the file using purge doesn't affect the object in memory.
Incidentally, why do you temporarily need the XML file on the hard drive?
John