Re: How do I access the original name for XML elements, including the original namespace prefix.

Daniel

Thanks for the quick response.  Just to be absolutely clear, I am
generating an XML DOM object using a namespace-aware document builder
factory.  That produces XML DOM objects where I can call the getPrefix()
method (see http://tinyurl.com/56onqp) for element nodes and get back
the namespace prefix used for that node.  Thus, the original prefixes
are exposed by my original data structure.  However, when I access those
same element nodes in the XML DOM from within a freemarker template and
then use the getPrefix() method (eg: element.prefix) I run into a
situation where I get back an empty freemarker.ext.dom.NodeListModel.

Is there something about the way that the element nodes are being
wrapped that hides the prefixes from me?

Cheers

Geoff Shuetrim




On Wed, 2008-10-22 at 08:29 +0200, Daniel Dekany wrote:
> Tuesday, October 21, 2008, 7:58:56 AM, Geoff Shuetrim wrote:
> 
> > I am trying to use Freemarker to produce an HTML representation of an
> > XML document, maintaining all of the information in the original
> > document (including xmlns:prefix="namespaceURI" declarations and the
> > prefixes on element names).  
> >
> > Note that I do not know, in advance, what the namespaces used in the XML
> > document will be, so I cannot declare them in my Freemarker template.
> >
> > When using the XML processing capabilities of Freemarker to access
> > elements in the XML document, is there some way for me to access the
> > original node name including the original prefix?
> 
> It's not possible (as the prefix name in the XML source is irrelevant
> according to the XML info-model), unless you set the XML parser to
> namespace unaware, with
> DocumentBuilderFactory.setNamespaceAware(boolean).
> 
> > Regards
> >
> > Geoff Shuetrim
> >
> > As background, I am currently generating the HTML rendering of the XML
> > using the following macros:
> >
> > [#escape x as x?html]
> > [@displayChildren parent=someElementNode indent=0 /]
> > [/#escape]
> >
> >
> > [#macro displayChildren parent indent]
> >
> > [#if parent?node_type="text"]
> > [#if parent?trim!=""]
> > <br/>
> > [@space indent=indent/]
> > [@elementText text="${parent?html}"/]
> > [/#if]
> > [/#if]
> >
> > [#if parent?node_type="element"]
> >
> [#if indent >> 0]<br/>[/#if]
> > [@space indent=indent/]
> > [@leftBracket/]
> > [@elementName text="${parent?node_name}"/]
> >
> > [#assign children = parent?children /]
> > [#assign hasChildren = (children?size != 0) /]
> > [#assign attributes = parent.@@ /]
> > [#assign hasAttributes = (attributes?size != 0) /]
> > [#assign isLeafNode = (children?size = 0) /]
> >
> > [#if hasAttributes]
> > [#list attributes as attribute]
> > [#assign markup = attribute.@@markup?html /]
> > [#assign parts = markup?split("=") /]
> > [#assign name = parts[0] /]
> > [#assign value = parts[1] /]
> > <br/>[@space indent=(indent+1)/]
> > [@attributeName text="${name}"/]
> > =
> > [@attributeValue text="${value}"/]
> > [/#list]
> > [/#if]
> >
> > [#if isLeafNode]
> > [@closeRightBracket /]
> > [#else]
> > [@rightBracket /]
> > [#list children as child]
> > [@displayChildren parent=child indent=(indent+1) /]
> > [/#list]
> > <br/>
> > [@space indent=indent /]
> > [@leftBracket /]
> > /
> > [@elementName text="${parent?node_name}" /]
> > [@rightBracket /]
> > [/#if]
> >
> > [/#if] 
> >
> > [/#macro]
> >
> > [#macro space indent]
> > [#if indent!=0]
> > [#list 1..indent as tab]
> > &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
> > [/#list]
> > [/#if]
> > [/#macro]
> >
> > [#macro leftBracket symbol="&lt;"]
> > <span class="element">${symbol}</span>
> > [/#macro]
> >
> > [#macro rightBracket symbol="&gt;"]
> > <span class="element">${symbol}</span>
> > [/#macro]
> >
> > [#macro closeRightBracket symbol="&gt;"]
> > <span class="element">/${symbol}</span>
> > [/#macro]
> >
> > [#macro elementName text]
> > <span class="elementName">
> > ${text?html}
> > </span>
> > [/#macro]
> >
> > [#macro elementText text]
> > <span class="elementText">${text}</span>
> > [/#macro]
> >
> > [#macro attributeName text]
> > <span class="attributeName">${text}</span>
> > [/#macro]
> >
> > [#macro attributeValue text]
> > <span class="attributeValue">${text}</span>
> > [/#macro]
> >
> >
> >
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