| 1 | package de.uka.ipd.sdq.pcmsolver.handler; |
| 2 | |
| 3 | import org.apache.log4j.Logger; |
| 4 | import org.eclipse.emf.common.util.EList; |
| 5 | |
| 6 | import de.uka.ipd.sdq.pcm.parameter.VariableCharacterisation; |
| 7 | import de.uka.ipd.sdq.pcm.parameter.VariableCharacterisationType; |
| 8 | import de.uka.ipd.sdq.pcm.parameter.VariableUsage; |
| 9 | import de.uka.ipd.sdq.pcm.repository.Parameter; |
| 10 | import de.uka.ipd.sdq.pcm.seff.CollectionIteratorAction; |
| 11 | import de.uka.ipd.sdq.pcmsolver.visitors.SeffVisitor; |
| 12 | import de.uka.ipd.sdq.stoex.AbstractNamedReference; |
| 13 | import de.uka.ipd.sdq.stoex.NamespaceReference; |
| 14 | |
| 15 | /** |
| 16 | * @author Koziolek |
| 17 | * |
| 18 | */ |
| 19 | public class CollectionIteratorActionHandler extends AbstractLoopActionHandler{ |
| 20 | |
| 21 | private static Logger logger = Logger.getLogger(CollectionIteratorActionHandler.class.getName()); |
| 22 | |
| 23 | public CollectionIteratorActionHandler(SeffVisitor seffVisitor) { |
| 24 | super(seffVisitor); |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * @param loop |
| 29 | */ |
| 30 | public void handle(CollectionIteratorAction collIterAction) { |
| 31 | Parameter parameter = collIterAction.getParameter_CollectionIteratorAction(); |
| 32 | String parameterName = parameter.getParameterName(); |
| 33 | |
| 34 | String iterCount = getIterationExpression(parameterName); |
| 35 | if (iterCount == null){ |
| 36 | logger.error("Skipping execution of loop body!"); |
| 37 | return; |
| 38 | } |
| 39 | |
| 40 | storeToUsageContext(collIterAction, iterCount); |
| 41 | |
| 42 | visitLoopBody(collIterAction, iterCount); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | |
| 47 | /** |
| 48 | * Fetches the expression describing the number of loop iteration |
| 49 | * from the usage context. It is the NUMBER_OF_ELEMENTS of the parameter |
| 50 | * in the SEFF, whose name is passed here as input parameter. |
| 51 | * |
| 52 | * @param soughtParameterName |
| 53 | * @return |
| 54 | */ |
| 55 | private String getIterationExpression(String soughtParameterName){ |
| 56 | EList<VariableUsage> vuList = visitor.getContextWrapper().getCompUsgCtx().getInput_ComputedUsageContext().getParameterChacterisations_Input(); |
| 57 | |
| 58 | for (VariableUsage vu : vuList){ // iterate over parameters |
| 59 | String currentParameterName = ""; |
| 60 | AbstractNamedReference ref = vu.getNamedReference__VariableUsage(); |
| 61 | while (ref instanceof NamespaceReference){ |
| 62 | NamespaceReference nsRef = (NamespaceReference)ref; |
| 63 | currentParameterName += nsRef.getReferenceName() + "."; |
| 64 | ref = nsRef.getInnerReference_NamespaceReference(); |
| 65 | } |
| 66 | currentParameterName += ref.getReferenceName(); |
| 67 | |
| 68 | if (currentParameterName.equals(soughtParameterName)){ |
| 69 | EList<VariableCharacterisation> varChars = vu.getVariableCharacterisation_VariableUsage(); |
| 70 | for (VariableCharacterisation vc : varChars){ // iterate over a parameter's characterisations |
| 71 | if (vc.getType() == VariableCharacterisationType.NUMBER_OF_ELEMENTS){ |
| 72 | return vc.getSpecification_VariableCharacterisation().getSpecification(); |
| 73 | } |
| 74 | } |
| 75 | logger.error("Variable Characterisation NUMBER_OF_ELEMENTS missing " + |
| 76 | "in Usage Context for parameter "+soughtParameterName+")! " + |
| 77 | "It is needed for a CollectionIteratorAction."); |
| 78 | return null; |
| 79 | } |
| 80 | } |
| 81 | logger.error("Variable "+soughtParameterName+" missing " + |
| 82 | "in Usage Context!"); |
| 83 | return null; |
| 84 | } |
| 85 | |
| 86 | } |