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

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