org.datanucleus.jdo.query
Class JDOTypesafeSubquery<T>

java.lang.Object
  org.datanucleus.jdo.query.AbstractTypesafeQuery<T>
      org.datanucleus.jdo.query.JDOTypesafeSubquery<T>

All Implemented Interfaces:

TypesafeSubquery<T>

public class JDOTypesafeSubquery<T>
extends AbstractTypesafeQuery<T>
implements TypesafeSubquery<T>

Implementation of a typesafe subquery for JDO. TODO JDOQL subqueries only allow result and filter, and JPQL subqueries allow result, filter, grouping, having.

Field Summary

Fields inherited from class org.datanucleus.jdo.query.AbstractTypesafeQuery

candidateAlias, candidateCls, filter, grouping, having, om, ordering, pm, result, resultDistinct

Constructor Summary

JDOTypesafeSubquery(javax.jdo.PersistenceManager pm, java.lang.Class<T> candidateClass, java.lang.String candidateAlias, JDOTypesafeQuery parentQuery)

Method Summary

PersistableExpression	candidate() Method to return an expression for the candidate of the subquery.
TypesafeSubquery	filter(BooleanExpression expr) Method to set the filter of the query.
java.lang.String	getAlias()
TypesafeSubquery	groupBy(Expression... exprs) Method to set the grouping(s) for the query.
TypesafeSubquery	having(Expression expr) Method to set the having clause of the query.
protected Expression	internalSelect(Expression expr, java.lang.Class implClass)
CollectionExpression	select(CollectionExpression expr) Accessor for the subquery (collection) expression from the subquery.
CharacterExpression	selectUnique(CharacterExpression expr) Accessor for the subquery (character) expression from the subquery when the subquery returns a single value.
<S> DateExpression<S>	selectUnique(DateExpression<S> expr) Accessor for the subquery (date) expression from the subquery when the subquery returns a single value.
<S> DateTimeExpression<S>	selectUnique(DateTimeExpression<S> expr) Accessor for the subquery (datetime) expression from the subquery when the subquery returns a single value.
<S> NumericExpression<S>	selectUnique(NumericExpression<S> expr) Accessor for the subquery (numeric) expression from the subquery when the subquery returns a single value.
StringExpression	selectUnique(StringExpression expr) Accessor for the subquery (string) expression from the subquery when the subquery returns a single value.
<S> TimeExpression<S>	selectUnique(TimeExpression<S> expr) Accessor for the subquery (time) expression from the subquery when the subquery returns a single value.

Methods inherited from class org.datanucleus.jdo.query.AbstractTypesafeQuery

compile, discardCompiled, getCompilation

Methods inherited from class java.lang.Object

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

Constructor Detail

JDOTypesafeSubquery

public JDOTypesafeSubquery(javax.jdo.PersistenceManager pm,
                           java.lang.Class<T> candidateClass,
                           java.lang.String candidateAlias,
                           JDOTypesafeQuery parentQuery)

Method Detail

getAlias

public java.lang.String getAlias()

candidate

public PersistableExpression candidate()

Description copied from interface: TypesafeSubquery

Method to return an expression for the candidate of the subquery. Cast the returned expression to the candidate "Q" type to be able to call methods on it.

Specified by:

candidate in interface TypesafeSubquery<T>

Returns:

Expression for the candidate

filter

public TypesafeSubquery filter(BooleanExpression expr)

Description copied from interface: TypesafeSubquery

Method to set the filter of the query.

Specified by:

filter in interface TypesafeSubquery<T>

Parameters:

expr - Filter expression

Returns:

The query

groupBy

public TypesafeSubquery groupBy(Expression... exprs)

Description copied from interface: TypesafeSubquery

Method to set the grouping(s) for the query.

Specified by:

groupBy in interface TypesafeSubquery<T>

Parameters:

exprs - Grouping expression(s)

Returns:

The query

having

public TypesafeSubquery having(Expression expr)

Description copied from interface: TypesafeSubquery

Method to set the having clause of the query.

Specified by:

having in interface TypesafeSubquery<T>

Parameters:

expr - Having expression

Returns:

The query

selectUnique

public <S> NumericExpression<S> selectUnique(NumericExpression<S> expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (numeric) expression from the subquery when the subquery returns a single value.

Specified by:

selectUnique in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

selectUnique

public StringExpression selectUnique(StringExpression expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (string) expression from the subquery when the subquery returns a single value.

Specified by:

selectUnique in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

selectUnique

public <S> DateExpression<S> selectUnique(DateExpression<S> expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (date) expression from the subquery when the subquery returns a single value.

Specified by:

selectUnique in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

selectUnique

public <S> DateTimeExpression<S> selectUnique(DateTimeExpression<S> expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (datetime) expression from the subquery when the subquery returns a single value.

Specified by:

selectUnique in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

selectUnique

public <S> TimeExpression<S> selectUnique(TimeExpression<S> expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (time) expression from the subquery when the subquery returns a single value.

Specified by:

selectUnique in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

selectUnique

public CharacterExpression selectUnique(CharacterExpression expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (character) expression from the subquery when the subquery returns a single value.

Specified by:

selectUnique in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

select

public CollectionExpression select(CollectionExpression expr)

Description copied from interface: TypesafeSubquery

Accessor for the subquery (collection) expression from the subquery.

Specified by:

select in interface TypesafeSubquery<T>

Parameters:

expr - The expression

Returns:

Expression for the typesafe query

internalSelect

protected Expression internalSelect(Expression expr,
                                    java.lang.Class implClass)