Package 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	Description
protected final String	propertyName

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected List	buildFunctionParameterList(String column)
protected List	buildFunctionParameterList(Criteria criteria, CriteriaQuery criteriaQuery)
protected SQLFunction	getFunction(String functionName, CriteriaQuery criteriaQuery)
protected SQLFunction	getFunction(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 SELECT 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 Details

propertyName

protected final String propertyName

Constructor Details

AggregateProjection

protected AggregateProjection(String functionName,
 String propertyName)

Method Details

getFunctionName

public String getFunctionName()

getPropertyName

public String getPropertyName()

toString

public String toString()

Overrides:

toString in class Object

getTypes

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

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

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

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)