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Memory Structures

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To sort data by the child business component, you must extract data from the master business component, store it, and re-sort it according to the values in the detail business component. The master and detail business component records are obtained through the master and detail datastreams.

In the Opportunities by Sales Rep (OPSLREP) standard report, each row of the opportunity query is processed before the data is formatted. Because data rows are transient objects, they are written into a temporary structure in memory as they are processed.

A global list or memory data buffer component can be used for this purpose. In the Opportunities by Sales Rep report, data rows from the Opportunities query are stored in a global list component. The AcList class, from which global list components are derived, is a smart array structure. A memory buffer (based on the AcMemoryBuffer class) is similar to a global list, but exhibits more complex behavior that is not required for most Siebel reports.

The RowList variable is derived from AcList, the AFC class designed to hold an ordered collection of objects. AcList is set up to function globally and has several methods that make it easy to manage lists. Methods for AcList variables are listed and described in Table 4.

Table 4.  Methods Available for AcList Variables

Method	Class Derived From	Description
AddToHead	AcList	Adds an item to the beginning of the list.
AddToTail	AcOrderedCollection	Adds an item to the end of the collection.
Contains	AcList	Returns TRUE if the list contains the item.
Copy	AcList	Copies the contents from another list to the end of this list.
GetAt	AcOrderedCollection	Returns the item at the specified location in the collection.
GetCount	AcCollection	Returns the number of objects in the collection.
GetHead	AcOrderedCollection	Returns the first item in the collection.
GetIndex	AcList	Returns the position of the node specified in the list.
GetTail	AcOrderedCollection	Returns the last item in the collection.
InsertAfter	AcList	Inserts a node in the list after the specified node.
InsertBefore	AcList	Inserts a node in the list before the specified node.
IsEmpty	AcCollection	Reports whether the collection is empty or not.
NewIterator	AcCollection	Creates an iterator for the collection.
Remove	AcCollection	Removes a specified item from the collection.
RemoveAll	AcCollection	Removes all contents from the collection.
RemoveHead	AcList	Removes the first node from the list.
RemoveTail	AcOrderedCollection	Removes the last item in the collection.

See the Actuate Foundation Class Reference for additional information on these methods.

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