public bool VerifyReferences(EXEScope Scope, CDClassPool ExecutionSpace) { bool Result = false; if (!EXETypes.ReferenceTypeName.Equals(EXETypes.DetermineVariableType("", this.Value))) { Result = true; } else { Result = Scope.VariableNameExists(this.Value); } return(Result); }
// SetUloh2 public override bool Execute(OALProgram OALProgram, EXEScope Scope) { //Select instances of given class that match the criteria and assign them to variable with given name // ClassName tells us which class we are interested in // Cardinality tells us whether we want one random instance (matching the criteria) or all of them // "Many" - we create variable EXEReferencingSetVariable, "Any" - we create variable EXEReferencingVariable // Variable name tells us how to name the newly created referencing variable // Where condition tells us which instances to select from all instances of the class (just do EXEASTNode.Evaluate and return true if the result "true" and false for "false") // When making unit tests, do not use the "where" causule yet, because its evaluation is not yet implemented // If relationship selection does not exists, this is problem if (this.RelationshipSelection == null) { return(false); } CDClass Class = OALProgram.ExecutionSpace.getClassByName(this.RelationshipSelection.GetLastClassName()); if (Class == null) { return(false); } // We need to check, if the variable already exists, it must be of corresponding type if (Scope.VariableNameExists(this.VariableName)) { if ( !( (EXECommandQuerySelect.CardinalityAny.Equals(this.Cardinality) && this.RelationshipSelection.GetLastClassName() == Scope.FindReferencingVariableByName(this.VariableName).ClassName) || (EXECommandQuerySelect.CardinalityMany.Equals(this.Cardinality) && this.RelationshipSelection.GetLastClassName() == Scope.FindSetReferencingVariableByName(this.VariableName).ClassName) ) ) { return(false); } } // Evaluate relationship selection. If it fails, execution fails too List <long> SelectedIds = this.RelationshipSelection.Evaluate(OALProgram.RelationshipSpace, Scope); if (SelectedIds == null) { return(false); } // If class has no instances, command may execute successfully, but we better verify references in the WHERE condition if (SelectedIds.Count() == 0 && this.WhereCondition != null) { return(this.WhereCondition.VerifyReferences(Scope, OALProgram.ExecutionSpace)); } // Now let's evaluate the condition if (this.WhereCondition != null && SelectedIds.Any()) { String TempSelectedVarName = "selected"; EXEReferencingVariable SelectedVar = new EXEReferencingVariable(TempSelectedVarName, this.RelationshipSelection.GetLastClassName(), -1); if (!Scope.AddVariable(SelectedVar)) { return(false); } List <long> ResultIds = new List <long>(); foreach (long Id in SelectedIds) { SelectedVar.ReferencedInstanceId = Id; String ConditionResult = this.WhereCondition.Evaluate(Scope, OALProgram.ExecutionSpace); //Console.Write(Id + " : " + ConditionResult); if (!EXETypes.IsValidValue(ConditionResult, EXETypes.BooleanTypeName)) { Scope.DestroyReferencingVariable(TempSelectedVarName); return(false); } if (EXETypes.BooleanTrue.Equals(ConditionResult)) { ResultIds.Add(Id); } } SelectedIds = ResultIds; Scope.DestroyReferencingVariable(TempSelectedVarName); } // Now we have ids of selected instances. Let's assign them to a variable if (EXECommandQuerySelect.CardinalityMany.Equals(this.Cardinality)) { EXEReferencingSetVariable Variable = Scope.FindSetReferencingVariableByName(this.VariableName); if (Variable == null) { Variable = new EXEReferencingSetVariable(this.VariableName, this.RelationshipSelection.GetLastClassName()); if (!Scope.AddVariable(Variable)) { return(false); } } foreach (long Id in SelectedIds) { Variable.AddReferencingVariable(new EXEReferencingVariable("", Variable.ClassName, Id)); } } else if (EXECommandQuerySelect.CardinalityAny.Equals(this.Cardinality)) { EXEReferencingVariable Variable = Scope.FindReferencingVariableByName(this.VariableName); if (Variable == null) { long ResultId = SelectedIds.Any() ? SelectedIds[new Random().Next(SelectedIds.Count)] : -1; Variable = new EXEReferencingVariable(this.VariableName, this.RelationshipSelection.GetLastClassName(), ResultId); if (!Scope.AddVariable(Variable)) { return(false); } } } else { return(false); } return(true); }