dbCalculator Class Reference
[OOFILE Database package]

#include <oof3.h>

Inheritance diagram for dbCalculator:

[legend]List of all members.

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Detailed Description

Base class for a calculator attached to a dbField.

The calculator will be used to supply the value for the field, either always or just a default to initialise an empty field.

See also:

dbField::calculateWith for how you attach calculators.

In general, calculated fields do not occupy storage space. However, the author of a specific calculated field may do something to cause another field to be allocated in the database. Also, indexed calculated fields will normally allocate a field to contain the indexed value. This makes them very fast to search.

Public Member Functions
virtual dbCalculator *	clone () const=0
virtual dbCalculator *	cloneOwned (dbField *newOwner) const
virtual	~dbCalculator ()

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Constructor & Destructor Documentation

virtual dbCalculator::~dbCalculator (   )  [inline, virtual]

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Member Function Documentation

virtual dbCalculator* dbCalculator::clone (   )  const [pure virtual]

Implemented in dbCharStripperCalculator.

dbCalculator * dbCalculator::cloneOwned (  dbField *  newOwner  )  const [virtual]

Reimplemented in dbCharStripperCalculator.

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The documentation for this class was generated from the following files:

• oof3.h
• oof3.cpp

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