Code Pieces

    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        Url other = (Url) obj;
        if (link == null) {
            if (other.link != null) {
                return false;
            }
        } else if (!link.equals(other.link)) {
            return false;
        }
        return true;
    }