CloneStateEvaluationFunctionFactory
This is a simple cloning implementation of the EvaluationFunctionStateFactory interface. In its constructor this class takes an original/prototype instance of a EvaluationFunction and clones it every time the method “create” is called.
Code example
// create a simple EvaluationFunction
EvaluationFunction evaluationFunctionOriginal = (context) -> {
if(context.get().getDouble("U") > 23.0){
context.collect(
context.getEventBuilder()
.withEvent("U_IS_HIGHER_23_VOLTAGE")
.withSource(context.get().getSource())
.withTimestamp(context.get().getTimestamp())
.withParameter("system time", System.getCurrentTimestamp())
.build();
);
}
};
...
// create the factory
CloneStateEvaluationFunctionFactory factory = CloneStateEvaluationFunctionFactory.builder()
.withPrototype(evaluationFunctionOriginal)
.build();
...
EvaluationFunction currentInstance = Evalufactory.create();
In this example first an original instance of a EvaluationFunction is created. This instance is passed to the Builder of the CloneStateEvaluationFunctionFactory and build is called, so that there is a factory instance.
To create untouched instances of the EvaluationFunction the method “create” is called and the new instance of the EvaluationFunction can be used for processing.