IModelling.IsSeriesEmpty

Syntax

IsSeriesEmpty(Input: ITimeSeries): Boolean;

Parameters

Input. The data series, which emptiness must be determined.

Description

The IsSeriesEmpty method determines whether a series is empty.

Comments

Available values:

True. Series is empty.
False. Series contains data.

Example

Executing the example requires that the repository contains a modeling container with the MS identifier. This container includes a model with the MODEL_D identifier that is calculated using the determinate equation method and contains at least one input variable.

Add links to the Metabase and Ms system assemblies.

Sub ProcEmpty;
Var
    Mb: IMetabase;
    ModelSpace, ModelObj: IMetabaseObject;
    Transf: IMsFormulaTransform;
    Formula: IMsFormula;
    Model: IMsModel;
    Determ: IMsDeterministicTransform;
    TransVar: IMsFormulaTransformVariable;
    Slice: IMsFormulaTransformSlice;
    TermInfo: IMsFormulaTermInfo;
    Expr: IExpression;
Begin
    // Get repository
    Mb := MetabaseClass.Active;
    // Get modeling container
    ModelSpace := Mb.ItemById("MS").Bind;
    // Get the model
    ModelObj := Mb.ItemByIdNamespace("MODEL_D", ModelSpace.Key).Edit;
    Model := ModelObj As IMsModel;
    // Get model calculation parameters
    Transf := Model.Transform;
    Formula := Transf.FormulaItem(0);
    Determ := Formula.Method As IMsDeterministicTransform;
    // Get the first input variable
    TransVar := Transf.Inputs.Item(0);
    Slice := TransVar.Slices.Item(0);
    TermInfo := Transf.CreateTermInfo;
    TermInfo.Slice := Slice;
    // Get model calculation expression
    Expr := Determ.Expression;
    Expr.References := "Ms";
    // Set model calculation expression
    Expr.AsString := "Iif(IsSeriesEmpty(" + TermInfo.TermInnerText + "), Null, " + TermInfo.TermInnerText + "+1)";
    // Check if the expression is correct
    If Expr.Valid
        // If the expression is set correctly, save the model
        Then ModelObj.Save;
        // If expression is not correct, output message to console window
        Else Debug.WriteLine("Model is not saved: error in the formula");
    End If;
End Sub ProcEmpty;

After executing the example the formula is changed for the model. If the first input variable contains data, its value is increased by 1.