[jdom-interest] setContent NOT setting parent correctly.
Dave Bartmess
dingodave at edingo.net
Thu Oct 16 08:55:53 PDT 2003
Oops, even that remedy won't work. I have to go through manually for
each call to detach the contents... arghhh
On Thu, 2003-10-16 at 11:50, Dave Bartmess wrote:
> Actually, I was hoping that setContent would be fixed <grin> It's a
> major part of my application, and it doesn't make much sense to even
> have it in the API if it doesn't detach the nodes itself. Otherwise, you
> can just do a removeContent() and then addAll(Collection).
>
> On Thu, 2003-10-16 at 13:40, Bradley S. Huffman wrote:
> > So we need to put a note in the javadocs that all nodes in the supplied
> > collection must be detached?
> >
> > Brad
> >
> > "Dave Bartmess" writes:
> >
> > > I'm using JDOM b10 (latest from CVS).
> > >
> > > >From looking at the javadocs, Element.setContent(Collection) SHOULD set
> > > the parent of each of the passed objects in the Collection to the
> > > calling instance.
> > > >From the javadocs:
> > > In addition, all objects in the supplied List will have their parentage
> > > set to this element, but the List itself will not be "live" and further
> > > removals and additions will have no effect on this elements content.
> > >
> > > But, from trying the code below, this is definitely NOT the case.
> > > Instead, it throws an IllegalAddException because in the calls to (in
> > > sequence) Element.setContent, ContentList.clearAndSet,
> > > ContentList.addAll, ContentList.add(Object), and finally
> > > ContentList.add(Element), nothing resets the passed List members'
> > > parent, and thus throws the exception.
> > >
> > > Therefore, setContent cannot work, unless you first go into the passed
> > > Collection, and one by one, set the parent to null for each object.
> > >
> > > Try the simple test class below, and you'll see what I mean:
> > >
> > > import org.jdom.*;
> > >
> > > public class Chance_1 extends Element {
> > > public Chance_1() {
> > > super("Chance");
> > > setDefaults();
> > > }
> > > public Chance_1(Chance_1 newchance) {
> > > super("Chance");
> > > setDefaults2();
> > > this.setContent(newchance.getContent());
> > > }
> > >
> > > public void setDefaults() {
> > > for (int i = 0; i < 10; i++) {
> > > Element child = new Element("Test" + i);
> > > child.setText("This is child " + i);
> > > this.addContent(child);
> > > }
> > > }
> > >
> > > public void setDefaults2() {
> > > for (int i = 100; i < 110; i++) {
> > > Element child = new Element("Test" + i);
> > > child.setText("This is child " + i);
> > > this.addContent(child);
> > > }
> > > }
> > >
> > > public static void main(String args[]) {
> > > Chance_1 test = new Chance_1();
> > > Chance_1 test2 = new Chance_1(test);
> > > }
> > > }
> > >
> > > --
> > > David A. Bartmess
> > > Software Configuration Manager / Sr. Software Developer
> > > eDingo Enterprises
> > > http://edingo.net
> > >
> > > _______________________________________________
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--
David A. Bartmess
Software Configuration Manager / Sr. Software Developer
eDingo Enterprises
http://edingo.net
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