/**
* Removes the updater from the map and disconnects it from the registry.
*
* @param updater to be disconnected and removed from the map
*/
public void removeUpdater(XtextIndexBasedRegistryUpdater updater) {
Preconditions.checkArgument(updater != null, "Updater cannot be null!");
IQuerySpecificationRegistry registry = updater.getConnectedRegistry();
if (updater.equals(updaters.get(registry))) {
updaters.remove(registry);
updater.disconnectIndexFromRegistry();
}
}
/**
* Returns an updater connecting the Xtext index with the given registry. If an updater for the
* given registry exists, it is returned instead.
*
* @param registry to connect with the index
* @return the connected updater
*/
public XtextIndexBasedRegistryUpdater getUpdater(IQuerySpecificationRegistry registry) {
Preconditions.checkArgument(registry != null, "Registry cannot be null!");
if (updaters.containsKey(registry)) {
return updaters.get(registry);
} else {
Injector injector =
EMFPatternLanguageActivator.getInstance()
.getInjector(
EMFPatternLanguageActivator
.ORG_ECLIPSE_VIATRA_QUERY_PATTERNLANGUAGE_EMF_EMFPATTERNLANGUAGE);
XtextIndexBasedRegistryUpdater updater =
injector.getInstance(XtextIndexBasedRegistryUpdater.class);
updaters.put(registry, updater);
updater.connectIndexToRegistry(QuerySpecificationRegistry.getInstance());
return updater;
}
}
