//$Id: CountProjection.java 9913 2006-05-09 07:40:11Z [email protected] $
package org.hibernate.criterion;
import org.hibernate.Criteria;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.type.Type;
/**
* A count
* @author Gavin King
*/
public class CountProjection extends AggregateProjection {
private boolean distinct;
protected CountProjection(String prop) {
super("count", prop);
}
public String toString() {
if(distinct) {
return "distinct " + super.toString();
} else {
return super.toString();
}
}
public Type[] getTypes(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
return new Type[] { Hibernate.INTEGER };
}
public String toSqlString(Criteria criteria, int position, CriteriaQuery criteriaQuery)
throws HibernateException {
StringBuffer buf = new StringBuffer();
buf.append("count(");
if (distinct) buf.append("distinct ");
return buf.append( criteriaQuery.getColumn(criteria, propertyName) )
.append(") as y")
.append(position)
.append('_')
.toString();
}
public CountProjection setDistinct() {
distinct = true;
return this;
}
}
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