@Override
public int hashCode() {
final int prime = 37;
int result = 17;
if (startArt != null) {
result = prime * result + startArt.hashCode();
} else {
result = prime * result;
}
if (endArt != null) {
result = prime * result + endArt.hashCode();
} else {
result = prime * result;
}
return result;
}
