[news.eclipse.modeling] Re: Enable propertyPage for UML Model

[eclipsengu@xxxxxxxxx (John )]

Managed to get this working by using the propertyTester extension.

This seems to be a long way to do this and possibly even the wrong way - 
but it works!

<extension point="org.eclipse.core.expressions.propertyTesters">
     <propertyTester
           class="myClass.ModelPropertyTester"
           id="myID.propertyTester"
           namespace="myNameSpace.properties"
           properties="isModel"
           type="java.lang.Object">
     </propertyTester>
</extension>

<extension point="org.eclipse.ui.propertyPages"> 
..
<enabledWhen>
   <test
       forcePluginActivation="true"
       property="myNameSpace.isModel"
       value="true">
   </test>
</enabledWhen>
..
</extension>


code in "myClass.ModelPropertyTester"
public class ModelPropertyTester extends PropertyTester {

 public boolean test(Object receiver, 
                     String property, 
	    	      Object[] args,
                     Object expectedValue) {

   boolean result = false;
		
   if (property.equalsIgnoreCase("isModel")){

     if(receiver instanceof ModelServerElement){
			
       ModelServerElement modelServerElement = 
(ModelServerElement)receiver;

         if (modelServerElement.getElement() instanceof Model) {
	    result = true;				
	  }

     }
		
  }
		
  return result;
 }
}