@Embeddable
public class SystemBoardType
    implements Equals, HashCode, ToString {

  @XmlTransient
  protected List<String> partNumber;

  @CollectionOfElements
    public List<String> getPartNumber() {
        if (partNumber== null) {
            partNumber = new ArrayList<String>();
        }
        return this.partNumber;
    }

    public void setPartNumberList<String> partNumber {
        this.partNumber = partNumber;
    }

    @Transient
    public boolean isSetPartNumber() {
        return ((this.partNumber!= null)&&(!this.partNumber.isEmpty()));
    }

    public void unsetPartNumber() {
        this.partNumber = null;
    }