Print prefix early in Xrces-J

[Philipp]

Hello,
I have a DOM which serializes to the following XML. As you see, the
namespace prefixed with "f" is repeated for each object. Is there a way
in Xerces-J to make an unique definition of the prefix in the top-level
element (so as to save room)?

Thanks for answers
Phil

<?xml version="1.0" encoding="UTF-8"?>
<e:test xmlns:e="http://www.example.com/e">
<f:value xmlns:f="http://www.example.com/f">
<f:val>12</f:val>
<f:unit>lux</f:unit>
</f:value>
<f:value xmlns:f="http://www.example.com/f">
<f:val>34.123 4</f:val>
<f:unit>amper e</f:unit>
</f:value>
<f:value xmlns:f="http://www.example.com/f">
<f:val>45.0</f:val>
<f:unit>empty_k ey</f:unit>
</f:value>
</e:test>

[Martin Honnen]

Re: Print prefix early in Xrces-J

Philipp wrote:

I have a DOM which serializes to the following XML. As you see, the
namespace prefixed with "f" is repeated for each object. Is there a way
in Xerces-J to make an unique definition of the prefix in the top-level
element (so as to save room)?

It might work to create an xmlns:f attribute on the root element e.g.

documentInstanc e.getDocumentEl ement().setAttr ibuteNS("http://www.w3.org/2000/xmlns/",
"xmlns:f", "http://www.example.com/f");

That way the serialization code is hopefully smart enough to avoid
duplicating the namespace declaration on the child elements.




--

Martin Honnen

http://JavaScript.FAQTs.com/

[Philipp]

Re: Print prefix early in Xrces-J

Martin Honnen wrote:

Philipp wrote:
>

>I have a DOM which serializes to the following XML. As you see, the
>namespace prefixed with "f" is repeated for each object. Is there a
>way in Xerces-J to make an unique definition of the prefix in the
>top-level element (so as to save room)?

>
It might work to create an xmlns:f attribute on the root element e.g.
>
documentInstanc e.getDocumentEl ement().setAttr ibuteNS("http://www.w3.org/2000/xmlns/",
"xmlns:f", "http://www.example.com/f");
>
That way the serialization code is hopefully smart enough to avoid
duplicating the namespace declaration on the child elements.

I tried it and unfortunately it's not smart enough :-( It really
duplicates the namespace on each child...

[Martin Honnen]

Re: Print prefix early in Xrces-J

Philipp wrote:

I tried it and unfortunately it's not smart enough :-( It really
duplicates the namespace on each child...

Are you sure those f:value elements do not have an xmlns:f attribute on
their own? If they have then I don't think the serializer will omit them.
So doing
NodeList values =
documentInstanc e.getElementsBy TagName("http://www.example.com/f", "value");
for (int i = 0, l = values.getLengt h(); i < l; i++)
{
Element value = (Element)values .getItem(i);
value.removeAtt ributeNS("http://www.w3.org/2000/xmlns/", "f");
}
might be necessary, depending on how your DOM looks.

--

Martin Honnen

http://JavaScript.FAQTs.com/

[Philipp]

Re: Print prefix early in Xrces-J

Martin Honnen wrote:

Philipp wrote:
>

>I tried it and unfortunately it's not smart enough :-( It really
>duplicates the namespace on each child...

>
Are you sure those f:value elements do not have an xmlns:f attribute on
their own? If they have then I don't think the serializer will omit them.

I typically create them with:
Element node = document.create ElementNS("http ://www.example.com/f",
"f:value");
root.appendChil d(node);

This automatically creates the xmlns:f attributes in the output.

So doing
NodeList values =
documentInstanc e.getElementsBy TagName("http://www.example.com/f", "value");
for (int i = 0, l = values.getLengt h(); i < l; i++)
{
Element value = (Element)values .getItem(i);
value.removeAtt ributeNS("http://www.w3.org/2000/xmlns/", "f");
}
might be necessary, depending on how your DOM looks.

Yes, I will try that...