com.viaoa.hub

Class HubLeftJoin<A extends OAObject,B extends OAObject>

java.lang.Object

com.viaoa.hub.HubLeftJoin<A,B>

public class HubLeftJoin<A extends OAObject,B extends OAObject>
extends Object

Combines two hubs into a new single hub to create the equivalent of a database left join, where all of the "left" side objects are in the list. The combined Hub (see getCombinedHub) uses OAObject OALeftJoin<A,B>, where A is the same class as the left Hub and B is the same as the right Hub. A property path that uses A or B will need to use casting. Example: LeftHub=hubDepartments, RightHub=hubEmployees with last name "Jones" the combined Hub A=Dept ref, B=Employee ref, can use hubCombined with properties from A or B, with casting: hubCombined, "(com.xxx.Department)A.manager.fullName" or a better solution: OAString.cpp(Departement.class, OALeftJoin.P_A, Department.P_Manager, Employee.P_FullName) see HubLeftJoinDetail# see HubGroupBy#

Author:

vvia

Constructor Summary

Constructors

Constructor and Description
HubLeftJoin(Hub<A> hubA, Hub<B> hubB, String propertyPath) Combine a left and right hubs on a propertyPath to form Hub.

Method Summary

Modifier and Type	Method and Description
Hub<OALeftJoin<A,B>>	getCombinedHub()

Methods inherited from class java.lang.Object

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

Constructor Detail

HubLeftJoin

public HubLeftJoin(Hub<A> hubA,
                   Hub<B> hubB,
                   String propertyPath)

Combine a left and right hubs on a propertyPath to form Hub.

Parameters:

hubA - left object

hubB - right object

propertyPath - pp of the property from the right object to get left object.

Method Detail

getCombinedHub

public Hub<OALeftJoin<A,B>> getCombinedHub()

Returns:

Hub of combined objects