@Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final ReadAccessSpecification other = (ReadAccessSpecification) obj;
        if (listOfPropertyReferences == null) {
            if (other.listOfPropertyReferences != null)
                return false;
        }
        else if (!listOfPropertyReferences.equals(other.listOfPropertyReferences))
            return false;
        if (objectIdentifier == null) {
            if (other.objectIdentifier != null)
                return false;
        }
        else if (!objectIdentifier.equals(other.objectIdentifier))
            return false;
        return true;
    }