org.hibernate.criterion

Class AggregateProjection

java.lang.Object

org.hibernate.criterion.SimpleProjection

org.hibernate.criterion.AggregateProjection

All Implemented Interfaces:

Serializable, EnhancedProjection, Projection

Direct Known Subclasses:

AvgProjection, CountProjection

public class AggregateProjection
extends SimpleProjection

Base class for standard aggregation functions.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected String	propertyName

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AggregateProjection(String functionName, String propertyName)

Method Summary

Modifier and Type	Method and Description
protected List	buildFunctionParameterList(Criteria criteria, CriteriaQuery criteriaQuery)
protected List	buildFunctionParameterList(String column)
protected SQLFunction	getFunction(CriteriaQuery criteriaQuery)
protected SQLFunction	getFunction(String functionName, CriteriaQuery criteriaQuery)
String	getFunctionName()
String	getPropertyName()
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 <tt>SELECT</tt> clause.
String	toString()

Methods inherited from class org.hibernate.criterion.SimpleProjection

as, getAliases, getColumnAliases, getColumnAliases, getColumnAliases, getColumnAliases, getColumnCount, 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 functionName,
                              String propertyName)

Method Detail

getFunctionName

public String getFunctionName()

getPropertyName

public String getPropertyName()

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 <tt>SELECT</tt> clause.

Parameters:

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

loc - The number of columns rendered in the <tt>SELECT</tt> 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 <tt>SELECT</tt>

Throws:

HibernateException - Indicates a problem performing the rendering

getFunction

protected SQLFunction getFunction(CriteriaQuery criteriaQuery)

getFunction

protected SQLFunction getFunction(String functionName,
                                  CriteriaQuery criteriaQuery)

buildFunctionParameterList

protected List buildFunctionParameterList(Criteria criteria,
                                          CriteriaQuery criteriaQuery)

buildFunctionParameterList

protected List buildFunctionParameterList(String column)

toString

public String toString()

Overrides:

toString in class Object