com.viaoa.hub

Class HubSelectDelegate

java.lang.Object

com.viaoa.hub.HubSelectDelegate

public class HubSelectDelegate
extends Object

Delegate used for Hub selecting and lazy loading (fetching) from datasource.

Author:

vvia

Constructor Summary

Constructors

Constructor and Description
HubSelectDelegate()

Method Summary

Modifier and Type	Method and Description
protected static int	_fetchMore(Hub thisHub, OASelect sel, int famt)
protected static boolean	_refresh(Hub thisHub)
static boolean	adoptWhereHub(Hub thisHub, String propName, Hub hubFrom) Check to see if thisHub can use the whereHub and "converted" PP as another Hub.
protected static void	cancelSelect(Hub thisHub, boolean bRemoveSelect) Cancels current OASelect, calling select.cancel() This will also set SelectLater to false and RequiredWhere to null.
protected static int	fetchMore(Hub thisHub) Internal method to retrieve objects from last select()
protected static int	fetchMore(Hub thisHub, int famt) Internal method to retrieve objects from last select()
protected static int	fetchMore(Hub thisHub, OASelect sel)
protected static int	fetchMore(Hub thisHub, OASelect sel, int famt)
static int	getCount(Hub thisHub)
protected static OASelect	getSelect(Hub thisHub) Returns OASelect used for querying datasource.
protected static OASelect	getSelect(Hub thisHub, boolean bCreateIfNull)
static String	getSelectOrder(Hub thisHub) Sort Order clause to use for select.
static String	getSelectWhere(Hub thisHub)
static Hub	getSelectWhereHub(Hub thisHub)
static String	getSelectWhereHubPropertyPath(Hub thisHub)
static boolean	isCounted(Hub thisHub)
static boolean	isMoreData(Hub thisHub) Find out if more objects are available from last select from OADataSource.
static boolean	isMoreData(OASelect sel)
static void	loadAllData(Hub thisHub) This will automatically read all records from current select().
static void	loadAllData(Hub thisHub, OASelect select)
static boolean	refresh(Hub thisHub)
static boolean	refreshSelect(Hub thisHub) This will re-run the last select.
static void	select(Hub thisHub, boolean bAppendFlag)
protected static void	select(Hub thisHub, OAObject whereObject, String whereClause, Object[] whereParams, String orderByClause, boolean bAppendFlag)
protected static void	select(Hub thisHub, OAObject whereObject, String whereClause, Object[] whereParams, String orderByClause, boolean bAppendFlag, OAFilter filter)
static void	select(Hub thisHub, OASelect select) Used to populate Hub with objects returned from a OADataSource select.
static void	selectPassthru(Hub thisHub, String whereClause, String orderClause)
static void	selectPassthru(Hub thisHub, String whereClause, String orderClause, boolean bAppend)
static void	setSelectOrder(Hub thisHub, String s) Sort Order clause to use for select.
static void	setSelectWhere(Hub thisHub, String s) WHERE clause to use for select.
static void	setSelectWhereHub(Hub thisHub, Hub hub)
static void	setSelectWhereHubPropertyPath(Hub thisHub, String pp)

Methods inherited from class java.lang.Object

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

Constructor Detail

HubSelectDelegate

public HubSelectDelegate()

Method Detail

fetchMore

protected static int fetchMore(Hub thisHub)

Internal method to retrieve objects from last select()

fetchMore

protected static int fetchMore(Hub thisHub,
                               OASelect sel)

fetchMore

protected static int fetchMore(Hub thisHub,
                               int famt)

Internal method to retrieve objects from last select()

fetchMore

protected static int fetchMore(Hub thisHub,
                               OASelect sel,
                               int famt)

_fetchMore

protected static int _fetchMore(Hub thisHub,
                                OASelect sel,
                                int famt)

isMoreData

public static boolean isMoreData(Hub thisHub)

Find out if more objects are available from last select from OADataSource.

isMoreData

public static boolean isMoreData(OASelect sel)

loadAllData

public static void loadAllData(Hub thisHub)

This will automatically read all records from current select(). By default, only 45 objects are read at a time from datasource.

loadAllData

public static void loadAllData(Hub thisHub,
                               OASelect select)

getSelect

protected static OASelect getSelect(Hub thisHub)

Returns OASelect used for querying datasource.

getSelect

protected static OASelect getSelect(Hub thisHub,
                                    boolean bCreateIfNull)

select

public static void select(Hub thisHub,
                          OASelect select)

Used to populate Hub with objects returned from a OADataSource select. By default, all objects will first be removed from the Hub, OASelect.select() will be called, and the first 45 objects will be added to Hub and active object will be set to null. As the Hub is accessed for more objects, more will be returned until the query is exhausted of objects.

cancelSelect

protected static void cancelSelect(Hub thisHub,
                                   boolean bRemoveSelect)

Cancels current OASelect, calling select.cancel() This will also set SelectLater to false and RequiredWhere to null.

getCount

public static int getCount(Hub thisHub)

isCounted

public static boolean isCounted(Hub thisHub)

setSelectWhere

public static void setSelectWhere(Hub thisHub,
                                  String s)

WHERE clause to use for select.

See Also:

setSelectOrder(com.viaoa.hub.Hub, java.lang.String), OASelect

getSelectWhere

public static String getSelectWhere(Hub thisHub)

setSelectOrder

public static void setSelectOrder(Hub thisHub,
                                  String s)

Sort Order clause to use for select.

See Also:

getSelectOrder(com.viaoa.hub.Hub), OASelect

getSelectOrder

public static String getSelectOrder(Hub thisHub)

Sort Order clause to use for select.

See Also:

setSelectOrder(com.viaoa.hub.Hub, java.lang.String), OASelect

select

public static void select(Hub thisHub,
                          boolean bAppendFlag)

select

protected static void select(Hub thisHub,
                             OAObject whereObject,
                             String whereClause,
                             Object[] whereParams,
                             String orderByClause,
                             boolean bAppendFlag)

select

protected static void select(Hub thisHub,
                             OAObject whereObject,
                             String whereClause,
                             Object[] whereParams,
                             String orderByClause,
                             boolean bAppendFlag,
                             OAFilter filter)

selectPassthru

public static void selectPassthru(Hub thisHub,
                                  String whereClause,
                                  String orderClause)

selectPassthru

public static void selectPassthru(Hub thisHub,
                                  String whereClause,
                                  String orderClause,
                                  boolean bAppend)

getSelectWhereHub

public static Hub getSelectWhereHub(Hub thisHub)

setSelectWhereHub

public static void setSelectWhereHub(Hub thisHub,
                                     Hub hub)

getSelectWhereHubPropertyPath

public static String getSelectWhereHubPropertyPath(Hub thisHub)

setSelectWhereHubPropertyPath

public static void setSelectWhereHubPropertyPath(Hub thisHub,
                                                 String pp)

adoptWhereHub

public static boolean adoptWhereHub(Hub thisHub,
                                    String propName,
                                    Hub hubFrom)

Check to see if thisHub can use the whereHub and "converted" PP as another Hub.

Example setup:
hubWhere<Company>
PP: [Company.]customers.orders.orderItems
reversePP: orderItem.order.customer.company

hubFrom = Hub<OrderItem>, hubWhere+PP=hub<Company>+"customers.orders.orderItems"
a select for hubFrom<OrderItem> would add a whereClause "AND order.customer.company=?", hubWhere<Company>.AO
Which would limit it to only selecting orderitems that are for a company.

Now ... if we have a Hub<Order> that is used to select an Order for an OrderItem, then it would need to only select under the same Company.
thisHub<Order>
calling adoptWhereHub(thisHub, "order", hubFrom<OrderItem>, where "order" is the property from hubFrom<OrderItem> to thisHub<Order>
would get hubWhere+PP from hubFrom<Orderitem>, which would be hub<Company>+"customers.orders.orderItems", and would reverse it to "order.customer.company", where the first link is "order", which matches propName "order", and thisHub<Order> would end up using hub<Company>+"customers.orders"

Parameters:

thisHub - Hub that could be in the same propertyPath of the hubFromHub.whereHubPropertyPath

propName - the link name of thisHub from hubFrom.

hubFrom - hub that might have a selectWhereHub & PP that can be used by thisHub.

refresh

public static boolean refresh(Hub thisHub)

_refresh

protected static boolean _refresh(Hub thisHub)

refreshSelect

public static boolean refreshSelect(Hub thisHub)

This will re-run the last select.

See Also:

OASelect