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KDB::Field Class Reference

Representation of a field object. More...

#include <field.h>

Inheritance diagram for KDB::Field:

List of all members.

Public Methods
	~Field ()
void	setPrecision (unsigned int size)
unsigned int	precision ()
void	setSize (unsigned int size)
unsigned int	size ()
void	setType (DataType t)
DataType	type ()
QString	nativeType ()
void	setConstraint (const QString &val)
QString	constraint ()
void	setAcceptNull (bool)
bool	acceptNull ()
bool	isNull ()
void	operator= (const QString &newVal)
void	operator= (const QDateTime &newVal)
void	operator= (int newVal)
void	operator= (double newVal)
	operator QString ()
	operator QDateTime ()
	operator int ()
	operator double ()
Friends
class	Recordset
class	Record
class	Table

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Detailed Description

Representation of a field object.

It knows its name, its datatype, constraints when available (like null/not null) and, when it is part of a record, its value.

The field object can manage only the data type of the underlying column. Conversion operators are provided for all common C++ datatypes. If a conversion is not allowed, a KDB::ConversionException is raised.

It is responsibility of the plugin to instantiate a correct field object for the underlying datatype. For datatypes not supported natively by C++, the Plugin can handle either QStrings or QByteArrays.

The datatype supported are the following:

• QString (can be used for unknown datatypes)
• QStringList (for sets and one-dimensional array)
• QDateTime
• QByteArray (for BLOBs and Unknown datatypes)
• char
• short
• int
• long
• float
• double
• long double
• bool

All numeric types are handled both in signed and unsigned form.

Author(s):

Alessandro Praduroux <pradu@thekompany.com> , Michael Koch <m_kock@bigfoot.de>

Version:

kdbcore 0.0.2

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Constructor & Destructor Documentation

~Field ( )

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Member Function Documentation

bool acceptNull ( )

QString constraint ( )

bool isNull ( )

QString nativeType ( )

operator QDateTime ( )

operator QString ( )

operator double ( )

operator int ( )

void operator= ( double newVal )

void operator= ( int newVal )

void operator= ( const QDateTime & newVal )

void operator= ( const QString & newVal )

unsigned int precision ( )

void setAcceptNull ( bool )

void setConstraint ( const QString & val )

void setPrecision ( unsigned int size )

void setSize ( unsigned int size )

void setType ( DataType t )

unsigned int size ( )

DataType type ( )

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Friends And Related Function Documentation

class Record [friend]

class Recordset [friend]

class Table [friend]

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

• field.h

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