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