Aggregation

• Collector
  • Add items
  • Alternate item keys
  • Get items
  • Aggregate methods
  • Subset of items
• Calculator
• Sheet
  • FixedSheet class
  • Sheet class

phpReport manages aggregation by using calculator classes organized in collector classes.

Three different calculator classes provides a different set of aggregation methods. Sheets are special variants of an collector. They are used to hold multiple calculator ojects of the same type.