Interface IArchiveProviderExtensible

This interface defines the extensibility property of an archive provider. Most of these methods are implemented by the standard base class IExtensibleColumnsBase. Actual functionality is found in the ExtensibleHelper class.

Namespace: SuperOffice.CRM.ArchiveLists
Assembly: SoDataBase.BusinessLogic.dll
Syntax
public interface IArchiveProviderExtensible

Properties

OrderBySlots

Each element of the outer list corresponds to one element of the client order by; the elements of each inner list are the actual database fields that the outer elements map to.

Declaration
OrderByStorage OrderBySlots { get; }
Property Value
Type Description
OrderByStorage
Remarks

Translation/mapping from column names into database fields is done by the various extenders and providers involved in a query. However, while these work independently of each other, a global ordering has to be maintained so that the first orderby column specified by the client becomes the first (list of) orderby field(s), even if the module responsible for translating them is not the first one to process the orderby. Therefore, the outer provider needs to maintain this list, pre-allocating it with the correct number of slots.

Each inner provider can then add its mapping, using a syntax similar to the following: 
int slot = 0;
foreach( ArchiveOrderByInfo info in _orderBy )
{
	if( HasColumn( info.Name ) )	// are we the ones to handle this orderby column?
		OrderBySlots[slot] = MapOrderBy( info );	// column name -> database field translation
	++slot;
}
The outer provider is then responsible for assembling the complete list of lists. The end result is to ensure that actual sorting corresponds to what was requested regardless of internal provider structure.

RootQuery

Returns the root query of the provider chain, so that extenders can modify it by adding their own tables

Declaration
ArchiveSelect RootQuery { get; }
Property Value
Type Description
ArchiveSelect

TableToExtend

Returns the tableinfo that describes the main table of the current provider (if the current provider is an extender, this is usually not the root table of the entire query). This is the table that extenders to this provider should latch onto.

Declaration
TableInfo TableToExtend { get; }
Property Value
Type Description
TableInfo

Methods

AddExtensionProvider(IArchiveExtender)

Add an additional provider who will extend existing rows with new columns

Declaration
void AddExtensionProvider(IArchiveExtender subProvider)
Parameters
Type Name Description
IArchiveExtender subProvider

Provider to be called by this provider

GetExtensionProviders()

Enumerate the providers that are extenders of this provider, making it possible to recursively enumerate the whole tree

Declaration
IEnumerable<IArchiveExtender> GetExtensionProviders()
Returns
Type Description
IEnumerable<IArchiveExtender>

Extension Methods