Re: [xsl] How to: Returning HTML Elements From a Saxon Extension Function (6.5.x)

["W. Eliot Kimber" <eliot@xxxxxxxxxx>]

W. Eliot Kimber wrote:
> W. Eliot Kimber wrote:

> My analysis is correct--turns out one of my collegues had already 
> figured this out and I didn't know it. What I had missed was the the 
> "Parse()" method on the Saxon DocumentBuilderImpl class, which allows 
> you to pass in a string to be parsed more or less directly. Here's the 
> basic pattern:
>
> public NodeInfo generateResultTree(String markup) {
>   java.io.ByteArrayInputStream bais = new
>                       ByteArrayInputStream(markup.getBytes());
>   org.xml.sax.InputSource isource = null;
>   try {
>      isource = new InputSource(bais);
>   } catch (org.xml.sax.SAXException e) {
>      e.printStackTrace();
>   }
>   org.w3c.dom.Document root = new
>             com.icl.saxon.om.DocumentBuilderImpl().parse(isource);
>   return (NodeInfo)(root.getDocumentElement());
> }

I discovered it's not quite so simple because the byte array you get 
from String.getBytes() is a UTF-16 byte sequence, but Aelfred (which 
Saxon uses in it's DocumentBuilderImpl) only handles UTF-8, so you have 
to convert the Java UTF-16 string to a UTF-8 byte array, which I did 
like so:

public NodeInfo generateMarkup(String markupString) {
  ByteArrayOutputStream baos = new ByteArrayOutputStream();

  OutputStreamWriter osw = null;
  // NOTE: the following exceptions should never happen,
  //       so there's no point in trapping them.
  try {
    osw = new OutputStreamWriter(baos, "UTF-8");
  } catch (UnsupportedEncodingException e2) {
    e2.printStackTrace();
  }
  try {
    osw.write(markupString);
  } catch (IOException e3) {
    e3.printStackTrace();
  }
  try {
    osw.flush();
    osw.close();
  } catch (IOException e4) {
    e4.printStackTrace();
  }
  ByteArrayInputStream bais = new
        ByteArrayInputStream(baos.toByteArray());
  InputSource isource = new InputSource(bais);
  Document root = null;
  try {
    root = new DocumentBuilderImpl().parse(isource);
  } catch (SAXException e1) {
    e1.printStackTrace();
  }
  return (NodeInfo)(root.getDocumentElement());
}



--
W. Eliot Kimber, eliot@xxxxxxxxxx
Consultant, ISOGEN International

1016 La Posada Dr., Suite 240
Austin, TX  78752 Phone: 512.656.4139


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