Package org.hibernate.criterion
Class AliasedProjection
- java.lang.Object
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- org.hibernate.criterion.AliasedProjection
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- All Implemented Interfaces:
Serializable
,EnhancedProjection
,Projection
public class AliasedProjection extends Object implements EnhancedProjection
Represents a projection that specifies an alias- See Also:
- Serialized Form
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Constructor Summary
Constructors Modifier Constructor Description protected
AliasedProjection(Projection projection, String alias)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String[]
getAliases()
Get the criteria-level aliases for this projection (ie.String[]
getColumnAliases(int loc)
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
.String[]
getColumnAliases(int loc, Criteria criteria, CriteriaQuery criteriaQuery)
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
.String[]
getColumnAliases(String alias, int loc)
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
for a particular criteria-level alias.String[]
getColumnAliases(String alias, int loc, Criteria criteria, CriteriaQuery criteriaQuery)
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
for a particular criteria-level alias.Type[]
getTypes(String alias, Criteria criteria, CriteriaQuery criteriaQuery)
Get the return types for a particular user-visible alias.Type[]
getTypes(Criteria criteria, CriteriaQuery criteriaQuery)
Types returned by the rendered SQLfragment
.boolean
isGrouped()
Is this projection fragment (SELECT clause) also part of the GROUP BYString
toGroupSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
Render the SQL fragment to be used in the GROUP BY clauseString
toSqlString(Criteria criteria, int position, CriteriaQuery criteriaQuery)
Render the SQL fragment to be used in the SELECT clause.String
toString()
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Constructor Detail
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AliasedProjection
protected AliasedProjection(Projection projection, String alias)
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Method Detail
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toSqlString
public String toSqlString(Criteria criteria, int position, CriteriaQuery criteriaQuery) throws HibernateException
Description copied from interface:Projection
Render the SQL fragment to be used in the SELECT clause.- Specified by:
toSqlString
in interfaceProjection
- 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
- Throws:
HibernateException
- Indicates a problem performing the rendering
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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 interfaceProjection
- 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
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getTypes
public Type[] getTypes(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException
Description copied from interface:Projection
Types returned by the rendered SQLfragment
. In other words what are the types that would represent the values this projection asked to be pulled into the result set?- Specified by:
getTypes
in interfaceProjection
- Parameters:
criteria
- The local criteria to which this project is attached (for resolution).criteriaQuery
- The overall criteria query instance.- Returns:
- The return types.
- Throws:
HibernateException
- Indicates a problem resolving the types
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getColumnAliases
public String[] getColumnAliases(int loc)
Description copied from interface:Projection
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
. Hibernate always uses column aliases to extract data from the JDBCResultSet
, so it is important that these be implemented correctly in order for Hibernate to be able to extract these values correctly.- Specified by:
getColumnAliases
in interfaceProjection
- Parameters:
loc
- Just as inProjection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
, represents the number of columns rendered prior to this projection.- Returns:
- The columns aliases.
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getColumnAliases
public String[] getColumnAliases(int loc, Criteria criteria, CriteriaQuery criteriaQuery)
Description copied from interface:EnhancedProjection
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
. Hibernate always uses column aliases to extract data from the JDBCResultSet
, so it is important that these be implemented correctly in order for Hibernate to be able to extract these values correctly.- Specified by:
getColumnAliases
in interfaceEnhancedProjection
- Parameters:
loc
- Just as inProjection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
, represents the number of columns rendered prior to this projection.criteria
- The local criteria to which this project is attached (for resolution).criteriaQuery
- The overall criteria query instance.- Returns:
- The columns aliases.
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getTypes
public Type[] getTypes(String alias, Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException
Description copied from interface:Projection
Get the return types for a particular user-visible alias. Differs fromProjection.getTypes(org.hibernate.Criteria, CriteriaQuery)
in that here we are only interested in the types related to the given criteria-level alias.- Specified by:
getTypes
in interfaceProjection
- Parameters:
alias
- The criteria-level alias for which to find types.criteria
- The local criteria to which this project is attached (for resolution).criteriaQuery
- The overall criteria query instance.- Returns:
- The return types; expected to return null if this projection does not understand this alias.
- Throws:
HibernateException
- Indicates a problem resolving the types
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getColumnAliases
public String[] getColumnAliases(String alias, int loc)
Description copied from interface:Projection
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
for a particular criteria-level alias.- Specified by:
getColumnAliases
in interfaceProjection
- Parameters:
alias
- The criteria-level aliasloc
- Just as inProjection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
, represents the number of columns rendered prior to this projection.- Returns:
- The columns aliases pertaining to a particular criteria-level alias; expected to return null if this projection does not understand this alias.
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getColumnAliases
public String[] getColumnAliases(String alias, int loc, Criteria criteria, CriteriaQuery criteriaQuery)
Description copied from interface:EnhancedProjection
Get the SQL column aliases used by this projection for the columns it writes for inclusion into the SELECT clause (Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
for a particular criteria-level alias.- Specified by:
getColumnAliases
in interfaceEnhancedProjection
- Parameters:
alias
- The criteria-level aliasloc
- Just as inProjection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery)
, represents the number of columns rendered prior to this projection.criteria
- The local criteria to which this project is attached (for resolution).criteriaQuery
- The overall criteria query instance.- Returns:
- The columns aliases pertaining to a particular criteria-level alias; expected to return null if this projection does not understand this alias.
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getAliases
public String[] getAliases()
Description copied from interface:Projection
Get the criteria-level aliases for this projection (ie. the ones that will be passed to theResultTransformer
)- Specified by:
getAliases
in interfaceProjection
- Returns:
- The aliases
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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 interfaceProjection
- Returns:
- True if the projection is also part of the GROUP BY; false otherwise.
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