EDOBE XDOM PMML Uživatelský manuál stáhnout pdf (Strana 82)

virtual INT64 getChunkPosition();

At any time, a CNKBufWriter can write a "chunk" of data rows in a

potentially-very-large series of data rows.

getChunkPosition returns

the row number of the first row in the chunk, counted from the start

of the series when

CNKBuf::init() was called. This value is the same

as the sum of all

releaseRows calls since CNKBuf::init() was last

called.

CNKBufWriter::

virtual void copyBufData(CNKBufReader* rdr,

long inFirstRowNum, long inFirstColNum,

long outFirstRowNum, long outFirstColNum,

long numRows, long numColumns = 1);

The copyBufData() method copies the values in a specified range of

rows and columns from this writer to the specified reader.

CNKProc Methods All data processing components should be derived from CNKProc,

which defines many methods for accessing

CNKBuf objects as inputs

and outputs, and managing the execution of the proc in a pipeline.

Many of the

CNKProc methods are virtual methods, so that subclasses

can redefine them.

CNKProc::

CNKProc();

virtual ~CNKProc();

virtual void init();

These are the CNKProc constructor, destructor, and init() methods.

Normally, there is no reason to construct a plain

CNKProc, since it

can't actually do any processing by itself. Instead, one would create

one of the subclasses of

CNKProc, designed to perform a particular

data processing task.

When designing a new subclass for

CNKProc, the subclass constructor

should call the

CNKProc base class constructor, using a form like:

CNKProcCount::CNKProcCount() : CNKProc()

{

....

}

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EDOBE XDOM PMML Uživatelský manuál Strana 82