@Override
	public boolean equals(Object obj) {
	    if (this == obj)
		return true;
	    if (obj == null)
		return false;
	    if (getClass() != obj.getClass())
		return false;
	    Log other = (Log) obj;
	    if (id == null) {
		if (other.id != null)
		    return false;
	    } else if (!id.equals(other.id))
		return false;
	    if (version != other.version)
		return false;
	    return true;
	}