Question

I have table /entity called SaleRecord with fields such as

@Entity
public class SaleRecord {
   private Long id;
   private String type;
   private Double amount;
   //Getter and Setter and more fields
}

I want to write below query using Criteria

SELECT s.type AS accountName, SUM(s.amount) AS amount 
FROM salerecord s
GROUP BY s.type

I have written using plain SQL in Hibernate as (Its working)

String sql = " SELECT s.type AS accountName, SUM(s.amount) AS amount ";
            sql += " FROM salerecord s ";
            sql += " GROUP BY s.type ";

List<CollectionDO> incomeList = (List<CollectionDO>) getSession().createSQLQuery(sql).setResultTransformer(Transformers.aliasToBean(CollectionDO.class)).list();

CollectionDO is another POJO class in which I want to populate the result.

But want to write using criteria, So how to write this query and transform result into CollectionDO class.
I have tried following but not working

Criteria criteria = getSession().createCriteria(SaleRecord.class).setResultTransformer(Transformers.aliasToBean(CollectionDO.class));
        criteria.setProjection(Projections.property("type"));
        criteria.setProjection(Projections.sum("amount"));        
        criteria.setProjection(Projections.groupProperty("type"));
        return (List<CollectionDO>) criteria.list();

CollectionDO.java

public class CollectionDO {    
    private Double amount;    
    private String accountName;

    public String getAccountName() {
        return accountName;
    }
    public void setAccountName(String accountName) {
        this.accountName = accountName;
    }
    public Double getAmount() {
        return amount;
    }
    public void setAmount(Double amount) {
        this.amount = amount;
    }     
}

Answer 1

I think it is not able to Transform. as in Criteria column name is “type” but CollectionDO.java has field as “accountName”

Try it as follows (using this version of add to specify the alias name):

Criteria criteria = 
    getSession()
        .createCriteria(SaleRecord.class)
        .add(Restrictions.between("date", 
                                  reportForm.getFromDate(), 
                                  reportForm.getToDate()));

        .setProjection(Projections.projectionList()
            .add(Projections.property("type"), "accountName")
            .add(Projections.sum("amount"))
            .add(Projections.groupProperty("type")));
        .setResultTransformer(Transformers.aliasToBean(CollectionDO.class))
return (List<CollectionDO>) criteria.list();