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SimpleProjection (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.criterion
Class SimpleProjection

java.lang.Object
  org.hibernate.criterion.SimpleProjection

All Implemented Interfaces:

Projection, Serializable

Direct Known Subclasses:

AggregateProjection, IdentifierProjection, PropertyProjection, RowCountProjection

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public abstract class SimpleProjection

extends Object

implements Projection

A single-column projection that may be aliased

Author:

Gavin King

See Also:

Serialized Form

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Constructor Summary

SimpleProjection()

 

Method Summary
Projection	as(String alias)
String[]	getAliases()           Get the user-visible aliases for this projection (ie.
String[]	getColumnAliases(int loc)           Get the SQL select clause column aliases
String[]	getColumnAliases(String alias, int loc)           Get the SQL select clause column aliases for a particular user-visible alias
Type[]	getTypes(String alias, Criteria criteria, CriteriaQuery criteriaQuery)           Return types for a particular user-visible alias
boolean	isGrouped()           Does this projection specify grouping attributes?
String	toGroupSqlString(Criteria criteria, CriteriaQuery criteriaQuery)           Render the SQL fragment to be used in the group by clause

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.hibernate.criterion.Projection

getTypes, toSqlString

 

Constructor Detail

SimpleProjection

public SimpleProjection()

Method Detail

as

public Projection as(String alias)

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getColumnAliases

public String[] getColumnAliases(String alias,
                                 int loc)

Description copied from interface: Projection

Get the SQL select clause column aliases for a particular user-visible alias

Specified by:

getColumnAliases in interface Projection

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getTypes

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

Description copied from interface: Projection

Return types for a particular user-visible alias

Specified by:

getTypes in interface Projection

Throws:

HibernateException

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getColumnAliases

public String[] getColumnAliases(int loc)

Description copied from interface: Projection

Get the SQL select clause column aliases

Specified by:

getColumnAliases in interface Projection

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getAliases

public String[] getAliases()

Description copied from interface: Projection

Get the user-visible aliases for this projection (ie. the ones that will be passed to the ResultTransformer)

Specified by:

getAliases in interface Projection

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toGroupSqlString

public String toGroupSqlString(Criteria criteria,
                               CriteriaQuery criteriaQuery)
                        throws HibernateException

Description copied from interface: Projection

Render the SQL fragment to be used in the group by clause

Specified by:

toGroupSqlString in interface Projection

Parameters:

criteriaQuery -

Returns:

String

Throws:

HibernateException

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isGrouped

public boolean isGrouped()

Description copied from interface: Projection

Does this projection specify grouping attributes?

Specified by:

isGrouped in interface Projection

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