| 1 | package de.uka.ipd.sdq.simucomframework.variables.stoexvisitor; |
| 2 | |
| 3 | import java.util.Iterator; |
| 4 | |
| 5 | import org.apache.log4j.Logger; |
| 6 | import org.eclipse.emf.ecore.EObject; |
| 7 | |
| 8 | import de.uka.ipd.sdq.probfunction.ProbabilityDensityFunction; |
| 9 | import de.uka.ipd.sdq.probfunction.ProbabilityMassFunction; |
| 10 | import de.uka.ipd.sdq.probfunction.math.IProbabilityDensityFunction; |
| 11 | import de.uka.ipd.sdq.probfunction.math.IProbabilityFunction; |
| 12 | import de.uka.ipd.sdq.probfunction.math.IProbabilityMassFunction; |
| 13 | import de.uka.ipd.sdq.probfunction.util.ProbfunctionSwitch; |
| 14 | import de.uka.ipd.sdq.simucomframework.variables.cache.StoExCache; |
| 15 | import de.uka.ipd.sdq.simucomframework.variables.cache.StoExCacheEntry; |
| 16 | |
| 17 | /** |
| 18 | * Visitor to visit probfunctions and evaluate them to return a sample |
| 19 | * @author Steffen Becker |
| 20 | * |
| 21 | */ |
| 22 | public class PCMProbfunctionEvaluationVisitor extends ProbfunctionSwitch<Object> { |
| 23 | private static Logger logger = |
| 24 | Logger.getLogger(PCMProbfunctionEvaluationVisitor.class.getName()); |
| 25 | |
| 26 | private StoExCacheEntry stoexCacheEntry; |
| 27 | |
| 28 | public PCMProbfunctionEvaluationVisitor(StoExCacheEntry stoexCacheEntry) { |
| 29 | this.stoexCacheEntry = stoexCacheEntry; |
| 30 | } |
| 31 | |
| 32 | @Override |
| 33 | public Object caseProbabilityDensityFunction(ProbabilityDensityFunction object) { |
| 34 | IProbabilityFunction pdf = stoexCacheEntry.getProbFunction(object); |
| 35 | Object result = drawSample(pdf); |
| 36 | logger.debug("Draw Sample returned "+result); |
| 37 | return result; |
| 38 | } |
| 39 | |
| 40 | @Override |
| 41 | public Object caseProbabilityMassFunction(ProbabilityMassFunction object) { |
| 42 | IProbabilityFunction pdf = stoexCacheEntry.getProbFunction(object); |
| 43 | Object result = drawSample(pdf); |
| 44 | logger.debug("Draw Sample returned "+result); |
| 45 | return result; |
| 46 | } |
| 47 | |
| 48 | private Object drawSample(IProbabilityFunction f) { |
| 49 | if (f == null) |
| 50 | throw new RuntimeException("Probability function in drawSample() must be != null"); |
| 51 | if (f instanceof IProbabilityMassFunction) |
| 52 | return ((IProbabilityMassFunction)f).drawSample(); |
| 53 | if (f instanceof IProbabilityDensityFunction) |
| 54 | return ((IProbabilityDensityFunction)f).drawSample(); |
| 55 | throw new RuntimeException("Should never be here. Unknown Probfunction found!"); |
| 56 | } |
| 57 | } |