public String toString() {
if (instance == null) {
return "";
}
final EIEntity instanceEntity = instance.getEntity();
final EIEntity classEntity = instance.getInstanceClass().getEntity();
final String hostname = instanceEntity.getURI().getNamespace();
return "{ " +
toJsonFragment(RESOURCE_LABEL, instanceEntity.getLabel()) + ", " +
toJsonFragment(RESOURCE_URI, instanceEntity.getURI().toString()) + ", " +
toJsonFragment(CLASS, classEntity.getURI().toString()) + ", " +
toJsonFragment(DEFINITION, classEntity.getLabel()) + ", " +
toJsonFragment(LOCATION, hostname) +
" }";
}
}