EDOBE XDOM PMML Uživatelský manuál stáhnout pdf (Strana 79)

CNKBufWriter

Methods

Most of the methods for CNKBufWriter are similar to those for

CNKBufReader. Like the other class, where is no public constructor for

CNKBufWriter object (it is created automatically in

CNKProc::setOutputBuf), and no public init() method (it is

initialized in

CNKBuf::init()).

CNKBufWriter::

CNKBuf* getBuf();

CNKProc* getProc();

Returns the CNKBuf or CNKProc linked by this CNKBufWriter.

CNKBufWriter::

virtual void setRequestRows(long numRows);

virtual long getRequestRows();

A CNKProc calls setRequestRows to request space for writing a given

number of data rows. This number must be less than or equal to the

total number of rows in the

CNKBuf. setRequestRows can be called

multiple times, to adjust this number up or down.

getRequestRows

returns the last row request.

When a

CNKProc calls setRequestRows, if numRows is greater than the

total number of rows in the

CNKBuf, or if numRows is greater than

CNKProc:: getNumRows(), then an error string is set for the CNKProc.

CNKBufWriter::

virtual long getRowsReady();

getRowsReady returns the number of data rows that are available to

write. At any given time, it may be less than the row request, equal to

it, or even greater (if there happen to be more rows available than the

request). However, the programmer can depend on it's always

increasing, until

releaseRows is called to release some of the read

data rows. Therefore, it is safe to save the value returned by

getRowsReady, and then process that many rows, without calling it

again to check.

CNKBufWriter::

virtual int isReady();

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EDOBE XDOM PMML Uživatelský manuál Strana 79