org.hibernate.criterion

Class IdentifierProjection

java.lang.Object

org.hibernate.criterion.SimpleProjection

org.hibernate.criterion.IdentifierProjection

All Implemented Interfaces:

Serializable, EnhancedProjection, Projection

public class IdentifierProjection
extends SimpleProjection

A property value, or grouped property value

Author:

Gavin King

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	IdentifierProjection() Constructs a non-grouped identifier projection

Method Summary

Modifier and Type	Method and Description
Type[]	getTypes(Criteria criteria, CriteriaQuery criteriaQuery) Types returned by the rendered SQL fragment.
boolean	isGrouped() Is this projection fragment (SELECT clause) also part of the GROUP BY
String	toGroupSqlString(Criteria criteria, CriteriaQuery criteriaQuery) Render the SQL fragment to be used in the GROUP BY clause
String	toSqlString(Criteria criteria, int position, 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

Methods inherited from class java.lang.Object

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

Constructor Detail

IdentifierProjection

protected IdentifierProjection()

Constructs a non-grouped identifier projection

See Also:

Projections.id()

Method Detail

getTypes

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

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.

toSqlString

public String toSqlString(Criteria criteria,
                          int position,
                          CriteriaQuery criteriaQuery)

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).

position - 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

isGrouped

public boolean isGrouped()

Description copied from interface: Projection

Is this projection fragment (SELECT clause) also part of the GROUP BY

Specified by:

isGrouped in interface Projection

Overrides:

isGrouped in class SimpleProjection

Returns:

True if the projection is also part of the GROUP BY; false otherwise.

toGroupSqlString

public String toGroupSqlString(Criteria criteria,
                               CriteriaQuery criteriaQuery)

Description copied from interface: Projection

Render the SQL fragment to be used in the GROUP BY clause

Specified by:

toGroupSqlString in interface Projection

Overrides:

toGroupSqlString in class SimpleProjection

Parameters:

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

criteriaQuery - The overall criteria query instance.

Returns:

The SQL fragment to plug into the GROUP BY

toString

public String toString()

Overrides:

toString in class Object