New topic: XML problem
<http://forums.realsoftware.com/viewtopic.php?t=24187> Page 1 of 1 [ 11 posts ] Previous topic | Next topic Author Message julgus_sweden Post subject: XML problemPosted: Wed Sep 03, 2008 3:45 am Joined: Wed Dec 05, 2007 5:17 am Posts: 393 Location: Sweden suppose that have a XML-data stream as <id>2</id><data>johan</data><add_data></add_data><more_data></more_data> I get a nilobjectexcepetion trying to process <add_data> as above due to empty data in the element. Furtermore I can't handle it with a try..exception block. I get an error and RB enviroment hangs and needs a restart. How do I handle this problem? I am using 2007R5 Win Xp edition. Best regards Johan _________________ iMac 27" i7, Macbook 13.3, Mac mini, iPhone 3gs & REALStudio... http://www.precis-it.se Top kendoll Post subject: Re: XML problemPosted: Wed Sep 03, 2008 4:36 am Joined: Mon Jul 17, 2006 10:39 am Posts: 1675 There are ways around getting a NilObjectException, like grabbing the number of elements in a node before descending into it. As far as handling the NilObjectException, I'm not sure why it'd be crashing on you. I've seen crashes because of an exception occasionally, but nothing ever reproducible after a reboot on 2008r1/Vista. Have you tried a newer version of RB? If all else fails, you might try double-checking your catch statement, or catch all exceptions and have your method fail from there. _________________ Kenneth McCleary [email protected] Top hom513 Post subject: Re: XML problemPosted: Thu Sep 04, 2008 8:42 pm Joined: Mon Apr 24, 2006 12:37 am Posts: 67 Location: Australia Have you tried switching on the `Break on Exceptions` under Project menu in the IDE ? _________________ REALbasic 2008r4.1 on MacBook Pro (Intel) Top void Post subject: Re: XML problemPosted: Fri Sep 05, 2008 5:43 am Joined: Thu Apr 24, 2008 8:04 am Posts: 30 I just don't understand why RB does not have an XML data type that abstracts xml in a nested object hierarchy. Top MagicMatt Post subject: Re: XML problemPosted: Fri Sep 05, 2008 6:38 am Joined: Tue Aug 05, 2008 1:20 pm Posts: 296 void wrote:I just don't understand why RB does not have an XML data type that abstracts xml in a nested object hierarchy. Maybe you should write one, and sell it... _________________ REALBasic 2008r5.1 Professional Windows XP SP3 Toshiba Tecra A9-11M Laptop Intel Core2 Duo T7700 @ 2.4GHz with 2Gb RAM @ 800MHz plus various other WinTel machines. (and a broken MacBook Pro 3.1 with OS-X 10.5.2 with no networking or sound thanks to a lightening storm) Top timhare Post subject: Re: XML problemPosted: Fri Sep 05, 2008 11:48 am Joined: Fri Jan 06, 2006 3:21 pm Posts: 7438 Location: Portland, OR USA void wrote:I just don't understand why RB does not have an XML data type that abstracts xml in a nested object hierarchy. I thought it did... What's missing from XMLDocument/XMLNode? I agree that they're a little difficult to wrap your head around, but that's the nature of XML anyway. With great flexibility comes great complexity. Tim Top npalardy Post subject: Re: XML problemPosted: Fri Sep 05, 2008 12:37 pm Joined: Sat Dec 24, 2005 8:18 pm Posts: 5772 Location: Canada, Alberta, Near Red Deer void wrote:I just don't understand why RB does not have an XML data type that abstracts xml in a nested object hierarchy. that's called the DOM and it's there as a standard part of any XML parser _________________ My web site Great White Software RBLibrary.com REALbasic learning Top void Post subject: Re: XML problemPosted: Sat Sep 06, 2008 11:13 am Joined: Thu Apr 24, 2008 8:04 am Posts: 30 npalardy wrote:void wrote:I just don't understand why RB does not have an XML data type that abstracts xml in a nested object hierarchy. that's called the DOM and it's there as a standard part of any XML parser No, that's not quite what I mean. It would be easier if I in RB could define an XML type based on an XSD, instance it and then access it in a more concrete dom with type check, validation and so on. For example, a RB XML type based on a scheme like: <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";> <xs:element name="address"> <xs:complexType> <xs:sequence> <xs:element name="name" type="xs:string"/> <xs:element name="street" type="xs:string"/> <xs:element name="city"type="xs:string"/> <xs:element name="country"type="xs:string"/> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> could be accessed as: Dim address as The_XSD_Address_Scheme_From_Above address(1).name = ... address(1).street = ... address(1).city = ... with the address instance having methods like count, export, import, etc. Basically if you have the XSD then you can forget about the xml formatting and stuff. This is all abstracted by RB when both analyzing and creating xml files. Top kendoll Post subject: Re: XML problemPosted: Sat Sep 06, 2008 7:21 pm Joined: Mon Jul 17, 2006 10:39 am Posts: 1675 With some cleverly overloaded Operator_Lookup()'s, I bet this could be done. _________________ Kenneth McCleary [email protected] Top void Post subject: Re: XML problemPosted: Wed Sep 10, 2008 4:26 am Joined: Thu Apr 24, 2008 8:04 am Posts: 30 Perhaps I wouldn't know. Top void Post subject: Re: XML problemPosted: Fri Mar 19, 2010 9:20 am Joined: Thu Apr 24, 2008 8:04 am Posts: 30 Any news about the below? Is there an XML datatype somewhere in the roadmap? ---------------------- For example, a RB XML type based on a scheme like: <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";> <xs:element name="address"> <xs:complexType> <xs:sequence> <xs:element name="name" type="xs:string"/> <xs:element name="street" type="xs:string"/> <xs:element name="city"type="xs:string"/> <xs:element name="country"type="xs:string"/> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> could be accessed as: Dim address as The_XSD_Address_Scheme_From_Above address(1).name = ... address(1).street = ... address(1).city = ... with the address instance having methods like count, export, import, etc. Basically if you have the XSD then you can forget about the xml formatting and stuff. This is all abstracted by RB when both analyzing and creating xml files. 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