org.hibernate.criterion
Class AggregateProjection

java.lang.Object
  org.hibernate.criterion.SimpleProjection
      org.hibernate.criterion.AggregateProjection

All Implemented Interfaces:

Serializable, Projection

Direct Known Subclasses:

AvgProjection, CountProjection

public class AggregateProjection
extends SimpleProjection

An aggregation

Author:

max

See Also:

Serialized Form

Field Summary

protected String

propertyName

Constructor Summary

protected

AggregateProjection(String aggregate, String propertyName)

Method Summary

Type[]	getTypes(Criteria criteria, CriteriaQuery criteriaQuery) Types returned by the rendered SQL fragment.
String	toSqlString(Criteria criteria, int loc, CriteriaQuery criteriaQuery) Render the SQL fragment to be used in the SELECT clause.
String	toString()

Methods inherited from class org.hibernate.criterion.SimpleProjection

as, getAliases, getColumnAliases, getColumnAliases, getTypes, isGrouped, toGroupSqlString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

propertyName

protected final String propertyName

Constructor Detail

AggregateProjection

protected AggregateProjection(String aggregate,
                              String propertyName)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getTypes

public Type[] getTypes(Criteria criteria,
                       CriteriaQuery criteriaQuery)
                throws HibernateException

Description copied from interface: Projection

Types returned by the rendered SQL fragment. In other words what are the types that would represent the values this projection asked to be pulled into the result set?

Parameters:

criteria - The local criteria to which this project is attached (for resolution).

criteriaQuery - The overall criteria query instance.

Returns:

The return types.

Throws:

HibernateException - Indicates a problem resolving the types

toSqlString

public String toSqlString(Criteria criteria,
                          int loc,
                          CriteriaQuery criteriaQuery)
                   throws HibernateException

Description copied from interface: Projection

Render the SQL fragment to be used in the SELECT clause.

Parameters:

criteria - The local criteria to which this project is attached (for resolution).

loc - The number of columns rendered in the SELECT clause before this projection. Generally speaking this is useful to ensure uniqueness of the individual columns aliases.

criteriaQuery - The overall criteria query instance.

Returns:

The SQL fragment to plug into the SELECT

Throws:

HibernateException - Indicates a problem performing the rendering