IColBufferManagerWrite Class Reference

managing interface for creating and filling point coordinates and attributes into a column based continuous memory buffer More...

#include "IColBufferManagerWrite.hpp"

Inheritance diagram for IColBufferManagerWrite:

Public Member Functions
virtual void	setSize (unsigned cols, int64_t rows)=0
	initialise row buffers (first function that will be called by GenericConverter::initColBufferManager) More...
virtual ColumnType	setColumnType (unsigned col, ColumnType colType, const char *colLabel, bool useNoDataMask=false)=0
	communicating the column type and label More...
virtual void *	getColumnBuffer (unsigned col)=0
	get the pointer to the corresponding column buffer More...
virtual void *	getColumnMaskBuffer (unsigned col)=0
	get the pointer to the optional mask column buffer
Public Member Functions inherited from ObjectBase
virtual void	Delete ()

Detailed Description

managing interface for creating and filling point coordinates and attributes into a column based continuous memory buffer

Member Function Documentation

getColumnBuffer()

virtual void* getColumnBuffer ( unsigned  col )

pure virtual

get the pointer to the corresponding column buffer

Will be called after the corresponding setSize and setColumnType calls. It is assumed that the returned pointer shows to an initialised and properly sized memory chunk, that can be filled. Note that null values do not change the corresponding memory byte(s).

setColumnType()

virtual ColumnType setColumnType ( unsigned  col, ColumnType  colType, const char *  colLabel, bool  useNoDataMask = false  )

pure virtual

communicating the column type and label

This function that will be called (by GenericConverter::initColBufferManager) for each column after the initial setSize function was called. The caller therefore communicates the type and label of each column that will be processed. The function must return the type of the internal columns buffer, which may differ from the provided type. However, only fixed size type are accepted:

DM::ColumnType	Memory Size and Representation
int_	4 byte, signed integer
uint_	4 byte, unsigned integer
char_	1 byte, integer
uchar_	1 byte, unsigned integer
short_	2 byte, integer
ushort_	2 byte, unsigned integer
float_	4 byte, real
double_	8 byte, real
llong_	8 byte, signed integer

Its the managers responsibility to create appropriate sized column buffers and that are initialise with appropriate null values, since the subsequent buffer filling doesn't write any null values are the corresponding memory positions.

Parameters

[in]	col	current column index
[in]	colType	DM type of the column/attribute
[in]	colLabel	label of current column/attribute
[in]	useNoDataMask	flag if a separate no data flag memory array is used instead of no data values

Returns

element type of internal column buffer

setSize()

virtual void setSize ( unsigned  cols, int64_t  rows  )

pure virtual

initialise row buffers (first function that will be called by GenericConverter::initColBufferManager)

Parameters

[in]	cols	number of column buffers that are required
[in]	rows	number of elements each row buffer needs to provide