Package org.hibernate.criterion
Class AggregateProjection
- java.lang.Object
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- org.hibernate.criterion.SimpleProjection
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- org.hibernate.criterion.AggregateProjection
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- All Implemented Interfaces:
Serializable
,EnhancedProjection
,Projection
- Direct Known Subclasses:
AvgProjection
,CountProjection
public class AggregateProjection extends SimpleProjection
Base class for standard aggregation functions.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected String
propertyName
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Constructor Summary
Constructors Modifier Constructor Description protected
AggregateProjection(String functionName, String propertyName)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected List
buildFunctionParameterList(String column)
protected List
buildFunctionParameterList(Criteria criteria, CriteriaQuery criteriaQuery)
protected SQLFunction
getFunction(String functionName, CriteriaQuery criteriaQuery)
protected SQLFunction
getFunction(CriteriaQuery criteriaQuery)
String
getFunctionName()
String
getPropertyName()
Type[]
getTypes(Criteria criteria, CriteriaQuery criteriaQuery)
Types returned by the rendered SQLfragment
.String
toSqlString(Criteria criteria, int loc, CriteriaQuery criteriaQuery)
Render the SQL fragment to be used in the SELECT clause.String
toString()
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Methods inherited from class org.hibernate.criterion.SimpleProjection
as, getAliases, getColumnAliases, getColumnAliases, getColumnAliases, getColumnAliases, getColumnCount, getTypes, isGrouped, toGroupSqlString
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Field Detail
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propertyName
protected final String propertyName
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Method Detail
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getFunctionName
public String getFunctionName()
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getPropertyName
public String getPropertyName()
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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?- 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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toSqlString
public String toSqlString(Criteria criteria, int loc, CriteriaQuery criteriaQuery) throws HibernateException
Description copied from interface:Projection
Render the SQL fragment to be used in the SELECT clause.- Parameters:
criteria
- The local criteria to which this project is attached (for resolution).loc
- 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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getFunction
protected SQLFunction getFunction(CriteriaQuery criteriaQuery)
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getFunction
protected SQLFunction getFunction(String functionName, CriteriaQuery criteriaQuery)
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buildFunctionParameterList
protected List buildFunctionParameterList(Criteria criteria, CriteriaQuery criteriaQuery)
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