//$Id: AggregateProjection.java 9908 2006-05-08 20:59:20Z [email protected] $
package org.hibernate.criterion;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.type.Type;
/**
* An aggregation
* @author max
*/
public class AggregateProjection extends SimpleProjection {
protected final String propertyName;
private final String aggregate;
protected AggregateProjection(String aggregate, String propertyName) {
this.aggregate = aggregate;
this.propertyName = propertyName;
}
public String toString() {
return aggregate + "(" + propertyName + ')';
}
public Type[] getTypes(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
return new Type[] { criteriaQuery.getType(criteria, propertyName) };
}
public String toSqlString(Criteria criteria, int loc, CriteriaQuery criteriaQuery)
throws HibernateException {
return new StringBuffer()
.append(aggregate)
.append("(")
.append( criteriaQuery.getColumn(criteria, propertyName) )
.append(") as y")
.append(loc)
.append('_')
.toString();
}
}
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