glo::BaseRecordAttribute Class Reference

Base class for the individual attributes of a Record. More...

#include <GloBaseRecordAttribute.h>

Inheritance diagram for glo::BaseRecordAttribute:

Public Member Functions
	BaseRecordAttribute (ClassInfoAttribute *pClassInfoAttribut, const std::streampos &rFilePos)
virtual	~BaseRecordAttribute ()
virtual bool	dataIsFieldContent () const =0
unsigned int	forget ()
AttributeID	getAttributeID () const
virtual int	getAttributeValueBlob (eut::Blob &rBlob) const
ClassInfoAttribute *	getClassInfoAttribute () const
std::string	getClassMemberName () const
std::string	getClassName () const
virtual BaseRecordAttribute *	getCopy ()=0
virtual unsigned short	getDataFieldLength () const =0
virtual std::string	getDataReference () const
EnDataType	getDataType () const
std::string	getFieldName () const
int	getFieldPos ()
std::streampos	getFilePosition () const
virtual int	getFormattedFieldContents (std::string &rsRetVal, DATA_REFERENCE_INFO &rRetValInfo, ObjID ObjID)
EnDataTypeGroup	getInfoType ()
unsigned int	getReferenceCount () const
std::string	getTableFieldName () const
std::string	getTableName () const
ClassInfoAttribute::Type	getType () const
std::string	getTypeAsCppString () const
std::string	getTypeAsString () const
std::string	getTypeInfo () const
virtual std::string	getValueAsDataString () const =0
virtual std::string	getValueAsDisplayString () const =0
virtual std::string	getValueAsStreamString () const =0
virtual std::string	getValueAsString () const =0
virtual void *	getValueAsVoidPointer ()=0
virtual void	initNew ()=0
unsigned int	remember ()
virtual void	setDataReference (const std::string &rsDataReference)
void	setFilePosition (const std::streampos &rFilePos)
virtual int	setValueFromObjectAttributeID (Persistent &rObject, const AttributeID &rAttributeID)
virtual void	setValueFromVoid (void *pValue)=0
virtual int	takeValue (const BaseRecordAttribute &rT)
virtual int	updateDataReference (const std::string &rsDataPath, DATA_REFERENCE_INFO MethodInfo)
bool	operator== (const BaseRecordAttribute &rT) const
	Comparison operator, all attributes are compared.
bool	operator!= (const BaseRecordAttribute &rT) const
	Comparison operator, all attributes are compared.

Protected Member Functions
	BaseRecordAttribute ()
	BaseRecordAttribute (const BaseRecordAttribute &rT)

Private Member Functions
BaseRecordAttribute &	operator= (const BaseRecordAttribute &)

Private Attributes
std::streampos	m_FilePosition
eut::CriticalSection	m_LocalCriticalSection
ClassInfoAttribute *	m_pClassInfoAttribut
unsigned int	m_uiReferenceCount

Static Private Attributes
static unsigned int	sm_uiInstanceCount

Friends
class	ptl::TDVList< BaseRecordAttribute >

Detailed Description

Base class for the individual attributes of a Record.

Only certain attributes are supported by GlobalObjects as storable. Every supported attribute of a persistent class must be derived from this class.

Objects of this type have a reference counter and must not be removed from memory using the destructor.

Objects with reference counters may only be instantiated once. When passing to another instance, the reference counter is incremented using remember(). If the instance that now owns the object no longer needs it, the reference counter is decremented using forget().

If the reference counter runs to 0, the destructor is called.

Copyright

© 2010 Helmut Jakoby

Author

Helmut Jakoby

Constructor & Destructor Documentation

BaseRecordAttribute() [1/3]

glo::BaseRecordAttribute::BaseRecordAttribute ( )

protected

The standard constructor is not available.

~BaseRecordAttribute()

virtual glo::BaseRecordAttribute::~BaseRecordAttribute ( )

virtual

The destructor is not available. The object may only be removed from memory using forget().

BaseRecordAttribute() [2/3]

glo::BaseRecordAttribute::BaseRecordAttribute	(	ClassInfoAttribute *	pClassInfoAttribut,
		const std::streampos &	rFilePos )

Constructor with parameter passing.

Parameters

[in]	pClassInfoAttribut	A class information attribute is expected.
[in]	rFilePos	The file position.

Exceptions

eut::ErrorNException

An exception is thrown if an error occurs.

BaseRecordAttribute() [3/3]

glo::BaseRecordAttribute::BaseRecordAttribute ( const BaseRecordAttribute & rT )

protected

Copy constructor.

Parameters

[in]

rT

The data is copied from this object.

See also

getCopy()

Member Function Documentation

dataIsFieldContent()

virtual bool glo::BaseRecordAttribute::dataIsFieldContent ( ) const

pure virtual

Returns true if the attribute data is stored as field content.
Returns false if attributes whose contents are not necessarily in a table column (because they may sometimes or even always be too large, and therefore a reference to a file is used as field content).

Returns

see above

Note

Must be overwritten by all non-abstract record attributes.

Attention

If record attributes can have a reference to the data, they must use the methods

• std::string getDataReference() const
• void setDataReference (...) const
• int getFormattedFieldContents (...) overwrite!"

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

forget()

unsigned int glo::BaseRecordAttribute::forget

(

)

An object of this class should always be delivered with a previous call to remember(). The supplied instance must then 'forget' the object again using this method.

Returns

The return value is the number of references to the object of this class.

Exceptions

eut::ErrorNException

An exception is thrown if the reference counter goes into minus.

getAttributeID()

AttributeID glo::BaseRecordAttribute::getAttributeID

(

)

const

Returns a unique attribute ID from m_pClassInfoAttribut.

Returns

The attribute ID.

getAttributeValueBlob()

virtual int glo::BaseRecordAttribute::getAttributeValueBlob ( eut::Blob & rBlob ) const

virtual

Inserts the string from getValueAsStreamString() at the end of the passed blob. Is for the DataStreamer.

Parameters

[in,out]

rBlob

The passed blob to which the data is appended.

Returns

A return value < 0 indicates an error.

Attention

Not all subclasses allow this method because they are streamed slightly differently. These subclasses return an error when this method is called.

Reimplemented in glo::BlobRecordAttribute, glo::LotRecordAttribute, and glo::StringRecordAttribute.

getClassInfoAttribute()

ClassInfoAttribute * glo::BaseRecordAttribute::getClassInfoAttribute

(

)

const

Returns the own class information attribute.

Returns

The class information attribute.

Attention

The delivered object only lives as long as the delivering object.

getClassMemberName()

std::string glo::BaseRecordAttribute::getClassMemberName

(

)

const

Returns the attribute description with class name separated by a period. For example, "MyClass.m_MyAttributes".

Returns

The class and attribute name.

getClassName()

std::string glo::BaseRecordAttribute::getClassName

(

)

const

Returns the class name to which the attribute belongs.

Returns

The class description.

getCopy()

virtual BaseRecordAttribute * glo::BaseRecordAttribute::getCopy ( )

pure virtual

Returns a copy of the object. Sometimes a copy of an attribute is needed, e.g. if a deep-copied record (with copied attributes) is needed.

Returns

The copy of this attribute

Attention

The supplied object must be removed from memory by the calling instance.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleListRecordAttribute, glo::DoubleRecordAttribute, glo::DoubleSetRecordAttribute, glo::DoubleVectorRecordAttribute, glo::EmbeddedRecordAttribute, glo::FloatRecordAttribute, glo::IntListRecordAttribute, glo::IntRecordAttribute, glo::IntSetRecordAttribute, glo::IntVectorRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::ObjIDRecordAttribute, glo::OdRefListRecordAttribute, glo::OdRefRecordAttribute, glo::OdRefSetRecordAttribute, glo::PoRefListRecordAttribute, glo::PoRefRecordAttribute, glo::PoRefSetRecordAttribute, glo::ShortRecordAttribute, glo::StdShrdPoRefRecordAttribute, glo::StringListRecordAttribute, glo::StringRecordAttribute, glo::StringSetRecordAttribute, glo::StringVectorRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

getDataFieldLength()

virtual unsigned short glo::BaseRecordAttribute::getDataFieldLength ( ) const

pure virtual

Returns the field length of the attribute value in subclasses.

Returns

The current field length.

See also

SchemaTypeString

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

getDataReference()

virtual std::string glo::BaseRecordAttribute::getDataReference ( ) const

virtual

Just delivers an empty string here.
This method must be overwritten for attributes whose contents are not necessarily to be placed in a table column (because they may sometimes or always be too large, and therefore a reference to a file is used as the field content).
This method should provide the file name in which the data is stored.

Returns

The existing file name. If empty, then there is probably none.

Reimplemented in glo::BlobRecordAttribute, glo::LotRecordAttribute, and glo::StringRecordAttribute.

getDataType()

EnDataType glo::BaseRecordAttribute::getDataType

(

)

const

Returns the attribute type as Enum.

Returns

The attribute type as Enum.

getFieldName()

std::string glo::BaseRecordAttribute::getFieldName

(

)

const

The table field description is returned.

Returns

The table field name.

getFieldPos()

int glo::BaseRecordAttribute::getFieldPos

(

)

Returns the column position in the table (starts at 0).

Returns

The tables column position.

getFilePosition()

std::streampos glo::BaseRecordAttribute::getFilePosition

(

)

const

Returns the position in the table file.

Returns

The file position.

getFormattedFieldContents()

virtual int glo::BaseRecordAttribute::getFormattedFieldContents ( std::string & rsRetVal, DATA_REFERENCE_INFO & rRetValInfo, ObjID ObjID )

virtual

Returns its formatted table field here as well as getValueAsDataString (...)
If the record attribute can have a reference to the data, this method returns its formatted table field and an information whether an external file for the data of the record attribute should be rewritten, kept or deleted; must then be overwritten in corresponding subclasses.

Parameters

[in,out]	rsRetVal	The table field as it should be written.
[in,out]	rRetValInfo	The information how to handle an external file.
[in]	ObjID	If a file name has to be created, the file name is formed from this object ID. Usually this is the object ID of the object whose attribute value is requested.

Returns

A return value < 0 indicates an error.

Reimplemented in glo::BlobRecordAttribute, glo::LotRecordAttribute, and glo::StringRecordAttribute.

getInfoType()

EnDataTypeGroup glo::BaseRecordAttribute::getInfoType

(

)

Returns the group type of the supported attribute type.

Returns

The group type.

getReferenceCount()

unsigned int glo::BaseRecordAttribute::getReferenceCount

(

)

const

Returns the number of referencing instances.

Returns

The number of referencing instances.

getTableFieldName()

std::string glo::BaseRecordAttribute::getTableFieldName

(

)

const

Returns the table and table field name separated by a period. For example, "TableName.FieldName".

Returns

The table and field name.

getTableName()

std::string glo::BaseRecordAttribute::getTableName

(

)

const

The table description is returned.

Returns

The table name.

getType()

ClassInfoAttribute::Type glo::BaseRecordAttribute::getType

(

)

const

Returns the type of the own class information attribute.

Returns

The type of the own class information attribute.

getTypeAsCppString()

std::string glo::BaseRecordAttribute::getTypeAsCppString

(

)

const

Returns the type of attribute supported by GlobalObjects as it appears in the header- and source-file.

Returns

The supported type attribute type.

getTypeAsString()

std::string glo::BaseRecordAttribute::getTypeAsString

(

)

const

Returns the type of attribute supported by GlobalObjects as it appears in the schema.

Returns

The supported type attribute type.

getTypeInfo()

std::string glo::BaseRecordAttribute::getTypeInfo

(

)

const

Returns an attribute type information like a number for a string length or an expression like dependent etc. Is always dependent on the attribute type.

Returns

The attribute type information.

getValueAsDataString()

virtual std::string glo::BaseRecordAttribute::getValueAsDataString ( ) const

pure virtual

Returns the value in subclasses as a formatted data string with the correct length for the entry in the table file (if necessary, padded with blanks at the front or back).

Returns

The value as a formatted data string.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

getValueAsDisplayString()

virtual std::string glo::BaseRecordAttribute::getValueAsDisplayString ( ) const

pure virtual

Returns the value in subclasses as it can be displayed for the GUI.

Returns

The value for the display.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

getValueAsStreamString()

virtual std::string glo::BaseRecordAttribute::getValueAsStreamString ( ) const

pure virtual

Returns the value in subclasses as string for the DataStreamer.

Returns

The value for the DataStreamer.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::OdRefListRecordAttribute, glo::OdRefSetRecordAttribute, glo::PoRefListRecordAttribute, glo::PoRefSetRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

getValueAsString()

virtual std::string glo::BaseRecordAttribute::getValueAsString ( ) const

pure virtual

Returns the attribute value as a string in subclasses.

Returns

The attribute value as a string.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

getValueAsVoidPointer()

virtual void * glo::BaseRecordAttribute::getValueAsVoidPointer ( )

pure virtual

Returns a raw pointer to the attribute value in subclasses.

Returns

The raw pointer to the attribute value.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleListRecordAttribute, glo::DoubleRecordAttribute, glo::DoubleSetRecordAttribute, glo::DoubleVectorRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntListRecordAttribute, glo::IntRecordAttribute, glo::IntSetRecordAttribute, glo::IntVectorRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::OdRefListRecordAttribute, glo::OdRefSetRecordAttribute, glo::PoRefListRecordAttribute, glo::PoRefSetRecordAttribute, glo::ShortRecordAttribute, glo::StringListRecordAttribute, glo::StringRecordAttribute, glo::StringSetRecordAttribute, glo::StringVectorRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

initNew()

virtual void glo::BaseRecordAttribute::initNew ( )

pure virtual

Initializes the attribute in the respective subclasses.

Implemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::LotRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

operator!=()

bool glo::BaseRecordAttribute::operator!=

(

const BaseRecordAttribute &

rT

)

const

Comparison operator, all attributes are compared.

Parameters

[in]

rT

The object to be compared with this one.

operator=()

BaseRecordAttribute & glo::BaseRecordAttribute::operator= ( const BaseRecordAttribute & )

private

The assignment operator is not available.

operator==()

bool glo::BaseRecordAttribute::operator==

(

const BaseRecordAttribute &

rT

)

const

Comparison operator, all attributes are compared.

Parameters

[in]

rT

The object to be compared with this one.

remember()

unsigned int glo::BaseRecordAttribute::remember

(

)

Increments the m_uiReferenceCount. Should always be called when an object of this class is delivered. The delivered instance must then 'forget' the object with forget().

Returns

The return value is the number of references to the object of this class.

setDataReference()

virtual void glo::BaseRecordAttribute::setDataReference ( const std::string & rsDataReference )

virtual

Not doing anything here.
This method must be overwritten for attributes whose contents are not necessarily to be placed in a table column (because they may sometimes or always be too large, and therefore a reference to a file is used as the field content).
This method should set the file name in which the data is stored.

Parameters

[in]

rsDataReference

The file name.

Reimplemented in glo::BlobRecordAttribute, and glo::StringRecordAttribute.

setFilePosition()

void glo::BaseRecordAttribute::setFilePosition

(

const std::streampos &

rFilePos

)

Sets the position in the table file.

Parameters

[in]

rFilePos

The file position.

setValueFromObjectAttributeID()

virtual int glo::BaseRecordAttribute::setValueFromObjectAttributeID ( Persistent & rObject, const AttributeID & rAttributeID )

virtual

The value of the RecordAttribut is determined from the class attribute of the passed Persistent using the passed AttributeID and usually the value is set using setValueFromVoid (...).
In subclasses, this method should be overwritten if the attribute is still to be fetched. See for example EmbeddedRecordAttribute::setValueFromObjectAttributeID (...).

Parameters

[in]	rObject	The persistent object whose attribute is used.
[in]	rAttributeID	The ID of the attribute of the passed object.

Returns

A return value < 0 indicates an error.

Exceptions

eut::ErrorNException

In case of an error, an exception can be thrown in subclasses.

Reimplemented in glo::EmbeddedRecordAttribute, glo::ObjIDRecordAttribute, glo::OdRefListRecordAttribute, glo::OdRefRecordAttribute, glo::OdRefSetRecordAttribute, glo::PoRefListRecordAttribute, glo::PoRefRecordAttribute, glo::PoRefSetRecordAttribute, and glo::StdShrdPoRefRecordAttribute.

setValueFromVoid()

virtual void glo::BaseRecordAttribute::setValueFromVoid ( void * pValue )

pure virtual

Transfers the value which is passed as a raw pointer to subclasses. A static_cast is made in each case.

Parameters

[in]

pValue

The value as raw pointer.

Implemented in glo::APointerRecordAttribute, glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::ShortRecordAttribute, glo::StringRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, glo::UShortRecordAttribute, glo::DoubleListRecordAttribute, glo::IntListRecordAttribute, glo::OdRefListRecordAttribute, glo::PoRefListRecordAttribute, glo::StringListRecordAttribute, glo::DoubleSetRecordAttribute, glo::IntSetRecordAttribute, glo::OdRefSetRecordAttribute, glo::PoRefSetRecordAttribute, glo::StringSetRecordAttribute, glo::DoubleVectorRecordAttribute, glo::IntVectorRecordAttribute, and glo::StringVectorRecordAttribute.

takeValue()

virtual int glo::BaseRecordAttribute::takeValue ( const BaseRecordAttribute & rT )

virtual

In this method the file position is taken over from rT. In subclasses, the attribute value is taken from the attribute passed, if possible. It is tried to cast the value somehow.

Parameters

[in]

rT

The persistent attribute from which the values are to be taken.

Returns

An error respectively warning message from subclasses will be delivered if the cast does not work.

Reimplemented in glo::BlobRecordAttribute, glo::BoolRecordAttribute, glo::CharRecordAttribute, glo::DateTimeRecordAttribute, glo::DoubleListRecordAttribute, glo::DoubleLotRecordAttribute, glo::DoubleRecordAttribute, glo::DoubleSetRecordAttribute, glo::DoubleVectorRecordAttribute, glo::FloatRecordAttribute, glo::IDRecordAttribute, glo::IntListRecordAttribute, glo::IntLotRecordAttribute, glo::IntRecordAttribute, glo::IntSetRecordAttribute, glo::IntVectorRecordAttribute, glo::LongDoubleRecordAttribute, glo::LongLongRecordAttribute, glo::LongRecordAttribute, glo::OdRefListRecordAttribute, glo::OdRefSetRecordAttribute, glo::PoRefListRecordAttribute, glo::PoRefSetRecordAttribute, glo::ShortRecordAttribute, glo::StringListRecordAttribute, glo::StringLotRecordAttribute, glo::StringRecordAttribute, glo::StringSetRecordAttribute, glo::StringVectorRecordAttribute, glo::TypeLotRecordAttribute, glo::UCharRecordAttribute, glo::UIntRecordAttribute, glo::ULongLongRecordAttribute, glo::ULongRecordAttribute, and glo::UShortRecordAttribute.

updateDataReference()

virtual int glo::BaseRecordAttribute::updateDataReference ( const std::string & rsDataPath, DATA_REFERENCE_INFO MethodInfo )

virtual

Not doing anything here.
This method must be overwritten for attributes whose contents are not necessarily to be placed in a table column (because they may sometimes or always be too large, and therefore a reference to a file is used as the field content).
This method should delete or write the file with the data if necessary.

Parameters

[in]	rsDataPath	The full directory name where the data can be found. The data is always located in a subdirectory of the directory where the schema file is located (e.g. "C:/Path/Data/").
[in]	MethodInfo	The information how to handle an external file.

Returns

A return value < 0 indicates an error.

Reimplemented in glo::BlobRecordAttribute, glo::LotRecordAttribute, and glo::StringRecordAttribute.

Friends And Related Symbol Documentation

ptl::TDVList< BaseRecordAttribute >

friend class ptl::TDVList< BaseRecordAttribute >

friend

Member Data Documentation

m_FilePosition

std::streampos glo::BaseRecordAttribute::m_FilePosition

private

Each persistent attribute, when saved, has a unique file location

m_LocalCriticalSection

eut::CriticalSection glo::BaseRecordAttribute::m_LocalCriticalSection

private

So that several threads can access remember() and forget(), access is synchronized with this object.

m_pClassInfoAttribut

ClassInfoAttribute* glo::BaseRecordAttribute::m_pClassInfoAttribut

private

Each persistent attribute needs specific schema information. These are available in the schema in the respective class information (ClassInfo) as class information attributes (GloClassInfoAttributes).

m_uiReferenceCount

unsigned int glo::BaseRecordAttribute::m_uiReferenceCount

private

The reference counter.

sm_uiInstanceCount

unsigned int glo::BaseRecordAttribute::sm_uiInstanceCount

staticprivate

For debug purposes, a static reference counter to check if all instances are cleared.

---

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

• GloBaseRecordAttribute.h