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Auto-generate LotusScript setter and getter properties for class variables

Learn LotusScript "cheat" code that will automatically generate setter and getter properties for your class variables.

Related resources from SearchDomino.com:
Tutorial: 30 LotusScript tips

FAQ: LotusScript

LotusScript Learning Guide

LotusScript Reference Center

Here's the problem. You're using object-oriented LotusScript to create classes and objects. Like a good object-oriented LotusScript developer, you're declaring all your class variables as "Private" and then writing " Setter" and " Getter" properties to allow access to them.

The truth is, most of the "Setter" and "Getter" properties that you would write offer direct read/write access to those variables anyway -- and writing them out is such a pain! You could cheat and declare the class variables as public or you could have a Lotus Notes form generate them for you.

Here is the code for a button that will do just this:

private m_MyVar1 as string
private m_MyVar2 as Variant
private m_MyVar3 as Integer
private m_MyVar4() as string

That will generate these:

Public Property Get MyVar1 as String
MyVar1 = me.m_MyVar1
End Property
Public Property Set MyVar1 as String
me.m_MyVar1 = MyVar1
End Property
Public Property Get MyVar2 as Variant
MyVar2 = me.m_MyVar2
End Property
Public Property Set MyVar2 as Variant
me.m_MyVar2 = MyVar2
End Property

... and so on.

To further set this up, create a Lotus Notes form in any Lotus Notes database and put two text fields in it.

These text fields should be labeled as:

  • Input: This is a multi-value Lotus Notes text field. Set the multi-value options tick boxes to use "NewLine" for both display and input.
  • Output: This is a single value Lotus Notes text field.

Now follow these steps:

  1. Create a button on the form and paste the button code below into its LotusScript Click event.
  2. Create a new Lotus Notes document from the form and paste your class variable declarations into the Input field.
  3. Click the button.

The "Setter" and "Getter" properties will be created in the Output field. You can then copy and paste the LotusScript below into your class definition code:

Button code
Dim session As New NotesSession
Dim ws As New NotesUIWorkspace
Dim uidoc As NotesUIDocument
Dim doc As NotesDocument
Dim inputVar As Variant

Set uidoc = ws.CurrentDocument
Set doc = uidoc.document

Call doc.ComputeWithForm
(False, False)

inputVar = doc.Input
If inputVar(0) = "" Then
Messagebox "No input found"
Exit Sub
End If


%REM
Assumptions are that class variables 
will declared thus private m_MyVar1 as 
string private m_MyVar2 as Variant private 
m_MyVar3 as Integer private m_MyVar4() 
as string

and so on. We use the Split function to 
create a variant array (tempVar) of 4 members. 
These will be
tempVar(0) = the word "Private".
tempVar(1) = the variable's name
tempVar(2) = the word "as"
tempvar(3) = the variable's type.

You need two text fields on a form:
"Input" = multi-value Text field. Set the multi-value 
options tickboxes to use NewLine.
"Output" = single value Text field
%END REM
Dim outputString As String
Dim tempString As String
Dim tempVar As Variant
Dim variableName As String
Dim setgetVariableName As String
Dim variableType As String
Dim NL As String
outputString$ = ""
Dim classVariablePrefix As String
classVariablePrefix$ = "m_"
NL$ = Chr$(13) & Chr$(10) ' True for 
Windoze only. Should change for Mac or 
Linux clients.
Forall inputLine In inputVar
tempVar = Split(inputLine, " ")
variableName = Trim(tempVar(1))
variableType = Trim(tempVar(3))

If Instr(variableName, "(") > 0 Then ' must be 
an array, so need to declare the set and 
get as Variant variableName$ = 
Strleft(variableName$, "(") variableType$ = 
"Variant"
End If

If Instr(variableName$, classVariablePrefix$) > 0 
Then setgetVariableName$ = Strrightback
(variableName$, classVariablePrefix$) Else 
setgetVariableName$ = variableName$ End 
If outputString$ = outputString$ & "public 
property get " & setgetVariableName$ & " as " 
& variableType$ & NL$ outputString$ = outputString$ 
& Chr$(9) & setgetVariableName$ & " = me." 
& variableName$ & NL$ outputString$ = 
outputString$ & "End Property" & NL$ outputString$ = 
outputString$ & "public property set " 
& setgetVariableName$ & " as " & variableType$ 
& NL$ outputString$ = outputString$ & Chr$(9) 
& " me." & variableName$ & " = " & setgetVariableName$ 
& NL$ outputString$ = outputString$ & "End Property" 
& NL$ & NL$ End Forall

doc.Output = outputString
Call uidoc.reload 

Do you have comments on this tip? Let us know.

This tip was submitted to the SearchDomino.com tip library by member Mike Brown. Please let others know how useful it is via the rating scale below. Do you have a useful Lotus Notes, Domino, Workplace or WebSphere tip or code snippet to share? Submit it to our monthly tip contest and you could win a prize.

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