程序包 org.hibernate.criterion

类 IdentifierProjection

java.lang.Object

org.hibernate.criterion.SimpleProjection

org.hibernate.criterion.IdentifierProjection

所有已实现的接口:

Serializable, EnhancedProjection, Projection

public class IdentifierProjection
extends SimpleProjection

A property value, or grouped property value

作者:

Gavin King

另请参阅:

序列化表格

构造器概要

构造器

限定符	构造器	说明
protected	IdentifierProjection()	Constructs a non-grouped identifier projection

方法概要

修饰符和类型	方法	说明
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()

从类继承的方法 org.hibernate.criterion.SimpleProjection

as, getAliases, getColumnAliases, getColumnAliases, getColumnAliases, getColumnAliases, getColumnCount, getTypes

从类继承的方法 java.lang.Object

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

构造器详细资料

IdentifierProjection

protected IdentifierProjection()

Constructs a non-grouped identifier projection

另请参阅:

Projections.id()

方法详细资料

getTypes

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

从接口复制的说明: 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?

参数:

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

criteriaQuery - The overall criteria query instance.

返回:

The return types.

toSqlString

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

从接口复制的说明: Projection

Render the SQL fragment to be used in the SELECT clause.

参数:

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.

返回:

The SQL fragment to plug into the SELECT

isGrouped

public boolean isGrouped()

从接口复制的说明: Projection

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

指定者:

isGrouped 在接口中 Projection

覆盖:

isGrouped 在类中 SimpleProjection

返回:

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

toGroupSqlString

public String toGroupSqlString(Criteria criteria,
                               CriteriaQuery criteriaQuery)

从接口复制的说明: Projection

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

指定者:

toGroupSqlString 在接口中 Projection

覆盖:

toGroupSqlString 在类中 SimpleProjection

参数:

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

criteriaQuery - The overall criteria query instance.

返回:

The SQL fragment to plug into the GROUP BY

toString

public String toString()

覆盖:

toString 在类中 Object