[Yanel-dev] DOM Helper classes.

[Michael Wechner]

Alec Bickerton schrieb:
> Are there any similar helper classes in the yanel core that include the
> functionality shown below.
>
> In short :
> - Create a new DOM object
> - Create a text element
> - Convert a DOM into a String.
>
> Not xml related but useful.
> - Stream data
>   

not that I am aware of. For example the YanelServlet

src/webapp/src/java/org/wyona/yanel/servlet/YanelServlet.java

has its own getDocument(String namespace, String localname)  class
> If not, then I would like to include these in a new package under
> org.wyona.util...
>
> WDYT?
>   

makes sense, whereas I think we should add this to the commons lib

https://svn.wyona.com/repos/public/commons/trunk

and as a package maybe

org.wyona.commons.xml.*

WDYT?

Cheers

Michael
>
> Code below..
>
>     private void streamData( InputStream is, OutputStream os, int
> packetSize  ) throws IOException {
>         final byte[ ] packet = new byte[ packetSize ];
>         int c = 0;
>         while( ( c = is.read( packet )) != -1  ){
>             os.write( packet );
>         }
>     }
>
>     public static final String toString( Document document, boolean
> isFragment, boolean indent, String charset ) {
>         if( document == null )
>             return null;
>         StringWriter strWtr = new StringWriter();
>         StreamResult strResult = new StreamResult(strWtr);
>         TransformerFactory tfac = TransformerFactory.newInstance();
>         try {
>             Transformer t = tfac.newTransformer();
>             if( isFragment )
>                 t.setOutputProperty( OutputKeys.OMIT_XML_DECLARATION, YES );
>
>             if( charset == null)
>                 t.setOutputProperty(OutputKeys.ENCODING, DEFAULT_ENCODING);
>             else
>                 t.setOutputProperty(OutputKeys.ENCODING, charset );
>             t.setOutputProperty(OutputKeys.INDENT, (indent) ? YES : NO);
>             t.setOutputProperty(OutputKeys.METHOD, "xml"); //xml, html, text
>
> t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
>             t.transform( new DOMSource(document.getDocumentElement()),
> strResult);
>         } catch (Exception e) {
>           // todo handle this more specifically
>         }
>         return strResult.getWriter().toString();
>     }
>
>     public static final Document  createDOM( String rootName ) throws
> ParserConfigurationException {
>         DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance();
>         DocumentBuilder docBuilder = dbfac.newDocumentBuilder();
>         Document doc = docBuilder.newDocument();
>         Element root = doc.createElement( rootName );
>         doc.appendChild(root);
>         return doc;
>     }
>
>     public static final Element createTextElement( Document doc, String
> name, String value, HashMap<String, String> attribs ){
>         Element child = doc.createElement( name );
>         if( attribs !=null ){
>             Iterator<Entry<String,String>> iter =
> attribs.entrySet().iterator();
>             while( iter.hasNext() ){
>                 Entry<String, String> attr = iter.next();
>                 child.setAttribute( attr.getKey(), attr.getValue() );
>             }
>         }
>         Text text = doc.createTextNode( value );
>         child.appendChild(text);
>         return child;
>     }
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