Using a keyless collection method

You can use the collection methods round robin and ordered without deriving a new APT_Collector class.

These collection methods are built in. Simply include a call to APT_Operator::setCollectionMethod() within the APT_Operator::describeOperator() function of your derived operator.

The function prototype of APT_Operator::setCollectionMethod() takes two arguments, as shown:

void setCollectionMethod(APT_Operator::CollectionMethod cType,
						int inputDS);

The first argument, cType, specifies the collection method as defined by the following values:

APT_Operator::eCollectRoundRobin
APT_Operator::eCollectOrdered

The second argument, inputDS, specifies the number of the input data set to the operator. These data sets are numbered starting from 0.

For example, to use round robin collection with a sequential operator that takes a single input data set, include the following statements within the operator describeOperator() function:

setKind(APT_Operator::eSequential);
setCollectionMethod(APT_Operator::eCollectRoundRobin, 0);

If the operator has two input data sets and you want to use ordered for both, include the lines:

setKind(APT_Operator::eSequential);
setCollectionMethod(APT_Operator::eCollectOrdered, 0);
setCollectionMethod(APT_Operator::eCollectOrdered, 1);