[jdom-interest] create xml tree

[Phil Weighill-Smith]

The result of:

rootObject.addContent(objectA);

is to set rootObject as the parent of objectA and to add objectA into
the content of rootObject such that rootObject.getContent() will return
a list that contains an objectA reference within it
(rootObject.getContent().indexOf(objectA) will return a 0 or positive
value). This assumes that objectA doesn't yet have a parent!

To add ObjectB to ObjectA you must:

objectA.addContent(objectB);

Again objectB must not yet have a parent.

As Per said, you need to build your JDOM from whatever other
representation you already have in memory using whatever logic your
application needs!

I still don't understand where the problem is, but that's probably
because I've no idea what you're really trying to achieve!

Phil :n)

On Mon, 2004-02-02 at 13:59, Mikael Petterson (KI/EAB) wrote:

> Hi,
> 
> Sorry for not being very clear on what I want to do. I give it another try.
> 
> I import an xml file (1). I creat a JDOM tree and retrieve information about parent-child relations since the xml I have does not express that for my objects explicitly. Then I have to create an another xml file (2) that describes the relationship between the objects. I have to create xml (2) to look like this:
> 
> <Model>
>  <RootObject>
>   <ObjectA>
>    <ObjectB/>
>    <ObjectC/>
>    <ObjectD>
>     <ObjectE/>
>    </ObjectD>
>   </ObjectA>
>  <RootObject>
> </Model>
> 
> This describes that parent-child relation in xml. Which is fine. But when I extract the relationship and try to build xml (2) I get a problem with keeping the relations.
> 
> I addContent() to rootObject. Like this:
> 
> rootObject.addContent(ObjectA);
> 
> Will the resulting Element be rootObject+ObjectA.
> So how can I then add ObjectB?
> 
> Hope it is a little bit more clear :-) Maybe ....
> 
> BR
> 
> //Mikael
> 
> -----Original Message-----
> From: Per Norrman [mailto:pernorrman at telia.com]
> Sent: den 2 februari 2004 13:57
> To: Mikael Petterson (KI/EAB); jdom-interest at jdom.org
> Subject: SV: [jdom-interest] create xml tree
> 
> 
> Sorry,
> 
> this one was hard to understand ...
> 
> > 
> > I am trying to find out if there is a way of adding children 
> > in a way that the parent-child relation will be kept.
> 
> When you add one element (child) to another element (parent),
> you create a parent-child relationship. Which parent-child
> relationship do you want to be preserved?
> 
> > I have a method to create the relation inbetween parent and 
> > child. I then want to make a recursive add of 
> > children to each parent. I have about 8 levels of 
> > parent-child relations. Doing 
> > 
> > parent.addContent(child); 
> > 
> > seems only to add the first level. How can I make it recursive?
> > 
> 
> You cannot make it recursive! Where are the grand children, and the
> grand-grand children, etc?
> 
> > Do I have to keep track of the element that I start to add 
> > children to and when all my addContent have been done I add 
> > the first element to the root and last create a Document?
> > 
> 
> Not knowing what your'e trying to do, but here are two hints:
> 
> 1) if youre tree is static, one alternative is to use a bottom-up
> approach (although I do not really recommend the coding style):
> 
>     Element e =
>        new Element("L1").addContent(
>          new Element("L2").addContent(
>             new Element("L3").addContent(
>                new Element("L4").addContent(
>                   new Element("L5").addContent(
>                      new Element("L6").addContent(
>                         new Element("L7").addContent(
>                            new Element("L8"))))))));
> 
> (At least the tree structure is obvious :-))
> 
> 2) if your tree is dynamic, you must have some representation of it
> before
> you go off and construct the JDOM tree. This representation must then be
> traversed
> and the JDOM tree built up along the way.
> 
> /pmn
> 
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-- 
Phil Weighill-Smith <phil.weighill-smith at volantis.com>
Volantis Systems
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