EDOBE XDOM PMML Manuel d'utilisateur télécharger pdf (Page 86)

Each CNKProc contains a field counting the number of times that it has

been executed. This field is incremented by the pipeline engine,

which calls

incrementExecuteCount(). The current value, retrieved

getExecuteCount(), can be useful during debugging.

CNKProc::

virtual void checkBufs(int inputs, int outputs);

virtual void checkBufs(int minInputs, int maxInputs,

int minOutputs, int maxOutputs);

These methods are useful utility methods that can be called from the

init() method to check the number of inputs and outputs that have

been defined. If they wrong number is found, the error string of the

CNKProc is set to an error.

For the two-argument method, if the number of inputs and outputs is

not exactly the number specified, the error string is set.

For the four-argument method, the number of inputs and outputs

must be in the specified ranges. For example,

checkBufs(0,2,1,1)

checks that the number of inputs is 0, 1, or 2, and the number of

outputs is exactly 1.

CNKProc::

virtual long executeRequestRows();

virtual void executeReleaseRows(long rows);

These methods are useful utility methods that handle the most

common input and output manipulation from an

execute() method.

Using these methods, many simple

CNKProc execute() methods can

be defined in only a few lines.

The operation of these methods, and how they can be used in a

custom

execute() method, are described below.

Creating a

Subclass of

CNKProc

Creating a new subclass of CNKProc requires defining a new init()

and

execute() method, and possibly a new isReady() method, as

well as creating new methods specific to the new class. The pipeline

is informed of the class’s existence using a special macro.

CNK_DEFINE_ACCESSIBLE_CLASS Macro

The function for creating a new object of a class is created by using

the macro

CNK_DEFINE_ACCESSIBLE_CLASS (defined in

CNKPropertyInfo.h, which is included by CNKObj.h). Given the name

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 97 98

Commentaires sur ces manuels

Pas de commentaire

EDOBE XDOM PMML Manuel d'utilisateur Page 86

Commentaires sur ces manuels