Re: [wtp-dev] Using ModelQueryExtension

[Keith Chong <kchong@xxxxxxxxxx>]

Hi Jim,

This extension point is used to provide guided editing (content assist).
  The WSDL and XML Schema editors use this extension point and you
can invoke this code by doing a CTRL-Space from any of the 'reference'
attribute values (like type or ref) in the Source view.  If you need
further assistance, let's continue this discussion in the WTP newsgroups.

Thanks,
Keith Chong

"Jim Kremens" <kremens@xxxxxxxxx>
Sent by: wtp-dev-bounces@xxxxxxxxxxx

11/26/2008 10:27 PM

Please respond to
"General discussion of project-wide or architectural issues."        <wtp-dev@xxxxxxxxxxx>

To	wtp-dev@xxxxxxxxxxx
cc
Subject	[wtp-dev] Using ModelQueryExtension

Hi all,

I'm having trouble implementing the
org.eclipse.wst.xml.core.modelQueryExtensions extension point.

I've declared it as follows in my plugin.xml:

<extension point="org.eclipse.wst.xml.core.modelQueryExtensions">
     <modelQueryExtension
           class="org.fhtml.eclipse.editors.MyModelQueryExtension"
           contentType="org.eclipse.wst.html.core.htmlsource">
     </modelQueryExtension>
 </extension>

and also built a class that extends ModelQueryExtension:

public class MyModelQueryExtension extends ModelQueryExtension {

      public MyModelQueryExtension() {
              System.out.print("NEVER
CALLED\n");
      }

      public String[] getAttributeValues(Element e, String
namespace,
String name) {
              //See XSDModelQueryExtension
for example...
      }

}



This is my first Eclipse plugin, so if anyone could explain to me the
mechanism that fires this code, that might help.  Even in the JSP
and
XSD packages that use this code, I haven't been able to find the place
where it is invoked (or where the listener is added).

Has anyone had success with this extension point?  Also, if anyone
knows of any real documentation on the topic, that would be great as
well.  As far as I can tell, there's almost nothing, as this is meant,
for now, to be an internal extension point.

Thanks,

Jim Kremens
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