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package hu.bme.mit.inf.dslreasoner.application.linking
import com.google.inject.Inject
import hu.bme.mit.inf.dslreasoner.application.applicationConfiguration.ApplicationConfigurationPackage
import hu.bme.mit.inf.dslreasoner.application.applicationConfiguration.EPackageImport
import hu.bme.mit.inf.dslreasoner.application.applicationConfiguration.ViatraImport
import java.util.Collections
import java.util.Optional
import org.eclipse.emf.common.util.URI
import org.eclipse.emf.ecore.EObject
import org.eclipse.emf.ecore.EPackage
import org.eclipse.emf.ecore.EReference
import org.eclipse.emf.ecore.resource.Resource
import org.eclipse.emf.ecore.resource.ResourceSet
import org.eclipse.viatra.query.patternlanguage.emf.scoping.IMetamodelProvider
import org.eclipse.xtext.conversion.IValueConverterService
import org.eclipse.xtext.conversion.ValueConverterException
import org.eclipse.xtext.linking.impl.DefaultLinkingService
import org.eclipse.xtext.nodemodel.ILeafNode
import org.eclipse.xtext.nodemodel.INode
class ApplicationConfigurationLinkingService extends DefaultLinkingService {
@Inject IValueConverterService valueConverterService
@Inject IMetamodelProvider metamodelProvider
public static extension ApplicationConfigurationPackage pac = ApplicationConfigurationPackage.eINSTANCE
override getLinkedObjects(EObject context, EReference ref, INode node) {
if (context instanceof EPackageImport) {
if (ref == EPackageImport_ImportedPackage && node instanceof ILeafNode) {
return getEPackage(context, node as ILeafNode)
}
} else if (context instanceof ViatraImport) {
if (ref == viatraImport_ImportedViatra) {
return getViatra(context, node)
}
}
return super.getLinkedObjects(context, ref, node)
}
private def getEPackage(EPackageImport packageImport, ILeafNode node) {
val x = getNSUri(node)
if (x.isPresent) {
val uriString = x.get
val epackageByMetamodelProvider = metamodelProvider.loadEPackage(uriString,
packageImport.eResource.resourceSet)
val epackageByMe = ePackageByMe(packageImport.eResource.resourceSet, uriString)
if (epackageByMetamodelProvider !== null) {
return Collections.singletonList(epackageByMetamodelProvider as EObject)
} else if (epackageByMe !== null) {
return Collections.singletonList(epackageByMe as EObject)
} else {
emptyList
}
} else {
return emptyList
}
}
private def ePackageByMe(ResourceSet rs, String uri) {
try {
val resource = rs.getResource(URI.createURI(uri), true);
return resource.contents.head as EPackage
} catch (Exception e) {
return null
}
}
private def getViatra(ViatraImport viatraImport, INode node) {
getByUri(viatraImport, viatraImport_ImportedViatra, node)
}
private def getByUri(EObject context, EReference ref, INode node) {
val uri = getNSUri(node)
if (uri.present) {
var URI createdURI
try {
createdURI = URI.createURI(uri.get)
} catch (IllegalArgumentException e) {
return super.getLinkedObjects(context, ref, node)
}
var Resource res
try {
res = context.eResource.resourceSet.getResource(createdURI, true);
} catch (RuntimeException e) {
return super.getLinkedObjects(context, ref, node)
}
if (res !== null && res.contents !== null) {
return res.contents.filter[ref.EType.isInstance(it)].toList
} else {
return super.getLinkedObjects(context, ref, node)
}
} else {
return super.getLinkedObjects(context, ref, node)
}
}
private def getNSUri(INode node) {
try {
val convertedValue = valueConverterService.toValue(node.text,
linkingHelper.getRuleNameFrom(node.grammarElement), node)
Optional.of(convertedValue as String)
} catch (ValueConverterException e) {
Optional.empty
}
}
}
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