Please, help me with my project (CLIPS 6.3 and NetBeans IDE)

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Irina Ira

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Jan 25, 2020, 1:08:23 PM1/25/20

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Hello,

I make an university project using CLIPS and Java.
I am trying to get some fact from a clips file.

I used code below:

clips.run();

String evaluar = "find-all-facts ((?v mydiagnosis)) TRUE";

PrimitiveValue value = clips.eval(evaluar);

String diagn= value.get(0).getFactSlot("diagn").toString();

JOptionPane.showMessageDialog(rootPane, "Diagnosis "+diagn);

clips.reset();

But it doesn't work. I have an error:

error: cannot find symbol

symbol: method get(int)

location: variable value of type PrimitiveValue

I tried to use the other code:

clips.run();

String evaluar = "find-all-facts ((?v mydiagnosis)) TRUE";

PrimitiveValue value = clips.eval(evaluar);

String diagn=((FactAddressValue) value.getValue()).getFactSlot("diagn").toString(); // There is no possible to set value.get(0) --- Why???

JOptionPane.showMessageDialog(rootPane, "Diagnosis "+diagn);

clips.reset();

But it doesn't work too.

Can someone help me please?

Thanks.

CLIPS Support

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Jan 27, 2020, 1:55:18 PM1/27/20

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Calling the find-all-facts function using Eval is going to return a multifield value, so you need to cast the return value to a MultifieldValue in order to use the get method. You can see an example of this in the CLIPSJNI demo program files AutoDemo.java and AnimalDemo.java:

String evalStr = "(find-fact ((?f UI-state)) TRUE)";

FactAddressValue fv = (FactAddressValue) ((MultifieldValue) clips.eval(evalStr)).get(0);