org.hibernate.criterion
Class AggregateProjection

java.lang.Object
  extended by org.hibernate.criterion.SimpleProjection
      extended by 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


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