Constructor Detail

• Distinct

  public Distinct(Projection proj)

Method Detail

• 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 interface Projection

  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

• 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:

  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

  Throws:

  HibernateException - Indicates a problem performing the rendering

• getTypes

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

  Description copied from interface: 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?

  Specified by:

  getTypes in interface Projection

  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

• 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 from Projection.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 interface Projection

  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

• 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 JDBC ResultSet, so it is important that these be implemented correctly in order for Hibernate to be able to extract these val;ues correctly.

  Specified by:

  getColumnAliases in interface Projection

  Parameters:

  loc - Just as in Projection.toSqlString(org.hibernate.Criteria, int, org.hibernate.criterion.CriteriaQuery), represents the number of columns rendered prior to this projection.

  Returns:

  The columns aliases.

• 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 JDBC ResultSet, so it is important that these be implemented correctly in order for Hibernate to be able to extract these val;ues correctly.

  Specified by:

  getColumnAliases in interface EnhancedProjection

  Parameters:

  loc - Just as in Projection.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.

• 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 interface Projection

  Parameters:

  alias - The criteria-level alias

  loc - Just as in Projection.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.

• 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 interface EnhancedProjection

  Parameters:

  alias - The criteria-level alias

  loc - Just as in Projection.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.

• 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 the ResultTransformer)

  Specified by:

  getAliases in interface Projection

  Returns:

  The aliases

• 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 interface Projection

  Returns:

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

• toString

  public String toString()

  Overrides:

  toString in class Object