map incomplete fields to class in hibernate

Sometimes you just want to partially use columns or fields in HQL but still want to map them into a class by Hibernate.
Well I also encounter this situation.
I have a entity class Word which has 5 fields:

@Entity(name = "word")
public class Word
{
    @Id
    @Basic(optional = false)
    @Column(nullable = false)
    private String word;

    @Column(length = 10)
    private String pinyin;

    @Column(length = 5)
    private String initial;

    @Column(length = 5)
    private String vowel;

    @Column
    private int count;
    //...

But my Criteria method only has two:

public List groupByInitial()
{
    Criteria criteria = super.createCriteria();
    criteria.setProjection(Projections.projectionList()
        .add(Projections.sum("count").as("count"))
        .add(Projections.groupProperty("initial").as("initial"))
    );
    criteria.add(Restrictions.neOrIsNotNull("pinyin", ""));
    return criteria.list();
}

You will surely get a Exception:

java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to rugal.entity.Word

To solve this we need a transform class, namely:

public class StatsWord
{
    private long count;

    private String initial;
    //...

This could just be a POJO, with the number and same alias in you Criteria method.
Then we need to register it in Criteria method, say:

criteria.setResultTransformer(Transformers.aliasToBean(StatsWord.class));

Now have a try if this is workable or not!