[EMAIL PROTECTED] wrote:
Hello,
I'm currently working on an extension class for use in an XSL file.
The transformation I want to perform is the following:
Input fragment:
<floatlist>0 1 2 3 4 5 6 7 8</floatlist>
Output fragment:
<vec3 value="0 1 2"/>
<vec3 value="3 4 5"/>
<vec3 value="6 7 8"/>
As to my knowledge there is no way to get this working in XSLT directly
(and because for the project behind it there is some more processing
required than shown above anyway), I wrote an extension function to do
this, and invoke it with this XSL fragment:
<xsl:for-each select="floatlist">
<xsl:value-of value="ext:makevec3s(.)"/>
</xsl:for-each>
First, you need to understand what xsl:value-of does:
http://www.w3.org/TR/xslt#value-of
"The xsl:value-of element is instantiated to create a text node in the
result tree. The required select attribute is an expression; this
expression is evaluated and the resulting object is converted to a
string as if by a call to the string function."
Next, the string function:
http://www.w3.org/TR/xpath#section-String-Functions
"A node-set is converted to a string by returning the string-value of
the node in the node-set that is first in document order. If the
node-set is empty, an empty string is returned."
Next, the string-value of a root node:
http://www.w3.org/TR/xpath#root-node
"The string-value of the root node is the concatenation of the
string-values of all text node descendants of the root node in document
order."
Since your extension function doesn't create any text nodes, the
string-value of the document fragment is an empty string.
However, looking at your expected output, you probably want to use
xsl:copy-of, since you want to copy the structure of the document
fragment to the result tree.
...
public DocumentFragment makevec3s(String in){
DocumentFragment dfrag = doc.createDocumentFragment();
// test float array, no need to show parsing code here
float[] floats = {0, 1, 2, 3, 4, 5, 6, 7, 8};
for(int i=2; i<floats.length; i+=3){
Element v3Element = doc.createElement("vec3");
You should be creating a namespace-aware DOM, by using createElementNS()
and setAttributeNS().
Dave
