org.apache.openjpa.jdbc.sql
Interface Joins

public interface Joins

Tracks joins made when traversing relations in a select.

Author:

Abe White

Method Summary

Joins	crossJoin(Table localTable, Table foreignTable) Perform a cross join on the given tables.
boolean	isEmpty() Whether we have any joins.
boolean	isOuter() Whether this joins path results in outer joins.
Joins	join(ForeignKey fk, boolean inverse, boolean toMany) Join the columns of the given foreign key.
Joins	joinRelation(String name, ForeignKey fk, ClassMapping target, int subclasses, boolean inverse, boolean toMany) Join the columns of the given foreign key, which represents a relation via the given field name.
Joins	outerJoin(ForeignKey fk, boolean inverse, boolean toMany) Join the columns of the given foreign key.
Joins	outerJoinRelation(String name, ForeignKey fk, ClassMapping target, int subclasses, boolean inverse, boolean toMany) Join the columns of the given foreign key, which represents a relation via the given field name.
Joins	setSubselect(String alias) Set the subquery alias.
Joins	setVariable(String var) Set the variable name being traversed into with the next join.

Method Detail

isEmpty

boolean isEmpty()

Whether we have any joins.

isOuter

boolean isOuter()

Whether this joins path results in outer joins.

crossJoin

Joins crossJoin(Table localTable,
                Table foreignTable)

Perform a cross join on the given tables.

join

Joins join(ForeignKey fk,
           boolean inverse,
           boolean toMany)

Join the columns of the given foreign key.

outerJoin

Joins outerJoin(ForeignKey fk,
                boolean inverse,
                boolean toMany)

Join the columns of the given foreign key.

joinRelation

Joins joinRelation(String name,
                   ForeignKey fk,
                   ClassMapping target,
                   int subclasses,
                   boolean inverse,
                   boolean toMany)

Join the columns of the given foreign key, which represents a relation via the given field name.

outerJoinRelation

Joins outerJoinRelation(String name,
                        ForeignKey fk,
                        ClassMapping target,
                        int subclasses,
                        boolean inverse,
                        boolean toMany)

Join the columns of the given foreign key, which represents a relation via the given field name.

setVariable

Joins setVariable(String var)

Set the variable name being traversed into with the next join.

setSubselect

Joins setSubselect(String alias)

Set the subquery alias.