Sample code for initializing Query-based feature setting delegates in dynamic mode

DynamicDelegates.xtend

package school.tests

import org.eclipse.core.resources.IFile
import org.eclipse.emf.ecore.EStructuralFeature
import org.eclipse.incquery.querybasedfeatures.runtime.QueryBasedFeatureSettingDelegateFactory
import org.eclipse.incquery.runtime.patternregistry.PatternRegistry
import org.eclipse.incquery.patternlanguage.patternLanguage.Pattern
import org.eclipse.emf.ecore.EPackage
import org.eclipse.emf.ecore.EcoreFactory
import org.eclipse.incquery.runtime.extensibility.QuerySpecificationRegistry

class DynamicDelegates {
  
  def prepareQueryBasedFeatureDelegates(){
    
    val eiqFile = null as IFile 
    val patterns = <Pattern>newArrayList() // list of patterns required for features
    
    patterns.forEach[ // we have to register the patterns that will be used
      val qs = QuerySpecificationRegistry::getOrCreateQuerySpecification(it)
      QuerySpecificationRegistry::registerQuerySpecification(qs)
      // TODO use pattern registry once it is added to core
      //PatternRegistry::INSTANCE.addPatternToRegistry(it, eiqFile)
    ]
    
    
    
    // this is a factory which should use unmanaged engines as dynamic mode is required
    val factory = new QueryBasedFeatureSettingDelegateFactory(false)
    val reg = EStructuralFeature.Internal.SettingDelegate.Factory.Registry::INSTANCE
    reg.put("org.eclipse.incquery.querybasedfeatures.runtime", factory)
    
    // next, you can add the delegate annotation to the EPackage
    val ePackage = null as EPackage
    // let's say it does not exist yet, you have to check and use the existing if any
    val delegateAnnotation = EcoreFactory::eINSTANCE.createEAnnotation => [
      source = "http://www.eclipse.org/emf/2002/Ecore"
      details.put("settingDelegates", "org.eclipse.incquery.querybasedfeatures.runtime")
    ]
    ePackage.EAnnotations.add(delegateAnnotation)   
  }
}