Top Description Constructors Methods

org.hibernate.criterion

public final Class Projections

Class Inheritance

extends Object

java.lang.Object
org.hibernate.criterion.Projections

Imports

org.hibernate.type.Type

The criterion package may be used by applications as a framework for building new kinds of Projection. However, it is intended that most applications will simply use the built-in projection types via the static factory methods of this class.

The factory methods that take an alias allow the projected value to be referred to by criterion and order instances.

Author: Gavin King
See Also: org.hibernate.Criteria, factory methods for <tt>Criterion</tt> instances

Constructor Summary

Access	Constructor and Description
private	Projections()

Method Summary

Modifier and Type	Method and Description
public static Projection	alias(Projection projection, String alias) Assign an alias to a projection, by wrapping it
public static AggregateProjection	avg(String propertyName) A property average value
public static CountProjection	count(String propertyName) A property value count
public static CountProjection	countDistinct(String propertyName) A distinct property value count
public static Projection	distinct(Projection proj) Create a distinct projection from a projection
public static PropertyProjection	groupProperty(String propertyName) A grouping property value
public static IdentifierProjection	id() A projected identifier value
public static AggregateProjection	max(String propertyName) A property maximum value
public static AggregateProjection	min(String propertyName) A property minimum value
public static ProjectionList	projectionList() Create a new projection list
public static PropertyProjection	property(String propertyName) A projected property value
public static Projection	rowCount() The query row count, ie.
public static Projection	sqlGroupProjection(String sql, String groupBy, String[] columnAliases, Type[] types) A grouping SQL projection, specifying both select clause and group by clause fragments
public static Projection	sqlProjection(String sql, String[] columnAliases, Type[] types) A SQL projection, a typed select clause fragment
public static AggregateProjection	sum(String propertyName) A property value sum

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Constructor Detail

Projections	back to summary
private Projections()

Method Detail

alias	back to summary
public static Projection alias(Projection projection, String alias) Assign an alias to a projection, by wrapping it

avg	back to summary
public static AggregateProjection avg(String propertyName) A property average value

count	back to summary
public static CountProjection count(String propertyName) A property value count

countDistinct	back to summary
public static CountProjection countDistinct(String propertyName) A distinct property value count

distinct	back to summary
public static Projection distinct(Projection proj) Create a distinct projection from a projection

groupProperty	back to summary
public static PropertyProjection groupProperty(String propertyName) A grouping property value

id	back to summary
public static IdentifierProjection id() A projected identifier value

max	back to summary
public static AggregateProjection max(String propertyName) A property maximum value

min	back to summary
public static AggregateProjection min(String propertyName) A property minimum value

projectionList	back to summary
public static ProjectionList projectionList() Create a new projection list

property	back to summary
public static PropertyProjection property(String propertyName) A projected property value

rowCount	back to summary
public static Projection rowCount() The query row count, ie. `count(*)`

sqlGroupProjection	back to summary
public static Projection sqlGroupProjection(String sql, String groupBy, String[] columnAliases, Type[] types) A grouping SQL projection, specifying both select clause and group by clause fragments

sqlProjection	back to summary
public static Projection sqlProjection(String sql, String[] columnAliases, Type[] types) A SQL projection, a typed select clause fragment

sum	back to summary
public static AggregateProjection sum(String propertyName) A property value sum