}
if (securityContext != null) {
// isolate resource authentication
try (final Tx tx = app.tx()) {
// evaluate constraint chain
resource = ResourceHelper.applyViewTransformation(request, securityContext,
ResourceHelper.optimizeNestedResourceChain(ResourceHelper.parsePath(securityContext, request, resourceMap, propertyView,
config.getDefaultIdProperty()), config.getDefaultIdProperty()), propertyView);