[xsd-users] Non intrusive data structures
barrie.kovish at singularsoftware.com
Wed Mar 31 12:54:44 EDT 2010
Thanks for the reply.
Looking at the documentation it looks like we should be able to remove an element from one sequence and place it in a second sequence without changing the address of other elements in either sequence. That would be exactly what we need. Do I understand this correctly?
Do you have a target date for beta 3.3.0 going into general release?
On 2010-03-29, at 8:33 AM, Boris Kolpackov wrote:
> Hi Barrie,
> Barrie Kovish <barrie.kovish at singularsoftware.com> writes:
>> I'm using the XSD tree mapping. I'd like to be able to move
>> elements around the XML document without changing the address
>> of the elements. For example suppose I have
>> <Dealer id="A">
>> <Car id="1">
>> <Car id="2">
>> <Dealer id="B" >
>> <Car id="3">
>> <Car id="4">
>> In code I want to keep a list of pointers to all Red cars. But if I
>> move car id 1 from dealer A to dealer B the address of the XSD data
>> structure will change. Is there a way to generate XSD classes which
>> save the Car elements as pointers?
> If you are using the beta for the upcoming 3.3.0 release, then you
> can detach a sub-tree from the object model and then re-attach it at
> a different point, all without reallocations and thus without changing
> the sub-tree's memory location. Here is the relevant part from the
> NEWS file:
> New option, --generate-detach, triggers the generation of detach
> functions for required elements and attributes. For optional and
> sequence cardinalities the detach functions are now provided by the
> respective containers even without this option. These functions, for
> example, allow one to move sub-trees in the object model either within
> the same tree or between different trees without copying. For more
> information, refer to Section 2.8 "Mapping for Local Elements and
> Attributes" in the C++/Tree Mapping User Manual.
> [The C++/Tree Mapping User Manual is in the package's documentation/
> directory; the online version is still for 3.2.0.]
>  http://www.codesynthesis.com/products/xsd/download.xhtml
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