managing interface for creating and filling point coordinates and attributes into a column based continuous memory buffer More...
#include "IColBufferManagerRead.hpp"
Inheritance diagram for IColBufferManagerRead:
Public Member Functions | |
| virtual int64_t | getRows () const =0 |
| virtual int64_t | getColumns () const =0 |
| virtual ColumnType | getColumnType (unsigned col) const =0 |
| get internal column type More... | |
| virtual const IValueTranslator * | getTranslator (unsigned col) const =0 |
| get optional translator object for translating values before setting | |
| virtual const void * | getColumnBuffer (unsigned col) const =0 |
| get the pointer to the corresponding column buffer More... | |
| virtual unsigned | getStride (unsigned col) const =0 |
| get stride size between subsequent elements in the column buffer More... | |
| 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()
|
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).
◆ getColumnType()
|
pure virtual |
get internal column type
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
- Returns
- element type of internal column buffer
◆ getStride()
|
pure virtual |
get stride size between subsequent elements in the column buffer
In case of continuous memory array the stride size is equal to the element size (in bytes)
1.8.17