Monday, January 4, 2010

Data buffer classes


Access Classes : There are four new data buffer classes: Rowset, Row, Record, and Field. These four classes are the foundation for accessing Component Buffer data through the new object syntax.

A field object, which is instantiated from the Field class, is a single instance of data within a record and is based on a field definition.

A record object, which is instantiated from the Record class, is a single instance of a data within a row and is based on a record definition. A record object consists of one to n fields

A row object, which is instantiated from the Row class, is a single row of data that consists of one to n records of data. A single row in a component scroll is a row. A row may have one to n child rowsets. For example, a row in a level two scroll may have n level three child rowsets.

A rowset object is a data structure used to describe hierarchical data. It is made up of a collection of rows. A component scroll is a rowset. You can also have a level 0 rowset.

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