Creating a Proper Class Object

Executing the example requires that the repository contains the Resources object with the OBJ_RES identifier. The file system must contain two icons: C:\Icon_small.ico and C:\Icon_large.ico.

Add links to the Metabase, Drawing, and IO system assemblies.

Sub UserProc;
Var
    Mb: IMetabase;
    Obj: IMetabaseObject;
    CustomClassExtender: IMetabaseCustomExtender;
    CustClasses: IMetabaseCustomClasses;
    CustomClass: IMetabaseCustomClass;
    Operations: IMetabaseCustomClassOperations;
    Operation: IMetabaseCustomClassOperation;
    CreateInfo: IMetabaseObjectCreateInfo;
    Description: IMetabaseObjectDescriptor;
    ImgList, ImgList32: IGxImageList;
    Icon: IGxIcon;
    CustomObject: IMetabaseCustomObject;
    se: IMetabaseSecurity;
    AL: IAuditLog;
    ALogs: IAuditLogons;
    AOperat: IAuditOperations;
    i: Integer;
    Lic: Object;
Begin
    Mb := MetabaseClass.Active;
    
// Create a custom class container
    CreateInfo := Mb.CreateCreateInfo;
    CreateInfo.ClassId := MetabaseObjectClass.KE_CLASS_CUSTOM_EXTENDER;
    CreateInfo.Name := 
"CUSTOM_EXTENDER";
    CreateInfo.Permanent := 
True;
    CreateInfo.Parent := Mb.Root;
    Description := Mb.CreateObject(CreateInfo);
    Obj := Description.Edit;
    CustomClassExtender := Obj 
As IMetabaseCustomExtender;
    ImgList := 
New GxImageList.Create;
    ImgList.Height := 
16;
    Icon := 
New GxIcon.CreateFromFile("C:\Icon_small.ico");
    ImgList.AddIcon(Icon);
    CustomClassExtender.SmallImages := ImgList;
    ImgList32 := 
New GxImageList.Create;
    ImgList32.Height := 
32;
    Icon := 
New GxIcon.CreateFromFile("C:\Icon_large.ico");
    ImgList32.AddIcon(Icon);
    CustomClassExtender.LargeImages := ImgList32;
    CustomClassExtender.IsShared := 
True;
    CustomClassExtender.Resource := Mb.ItemById(
"OBJ_RES").Bind As IResourceObject;
    CustomClassExtender.NameResource := 
"ID_CUSTOM_EXTENDER";
    
    
// Add a custom class to container
    CustClasses := CustomClassExtender.Classes;
    CustomClass := CustClasses.Add;
    CustomClass.Description := 
"Proper class";
    CustomClass.Id := 
"MY_CLASS";
    CustomClass.Name := 
"My_Class";
    CustomClass.ImageIndex := 
0;
    Operations := CustomClass.Operations;
    Operation := Operations.Add(
0);
    Operation.Name := 
"New method";
    Obj.Save;
    
    
// Create a custom class object
    CreateInfo.ClassId := CustomClass.ClassId;
    CreateInfo.Name := 
"Proper class object";
    CreateInfo.Permanent := 
True;
    CreateInfo.Parent := Mb.Root;
    Description := Mb.CreateObject(CreateInfo);
    Obj := Description.Edit;
    CustomObject := Obj 
As IMetabaseCustomObject;
    CustomObject.Extender := CustomClassExtender;
    CustomObject.CustomClass := CustomClass;
    Obj.Save;
    
    
// Check access permissions for custom class operation.
    Lic := MB.RequestLicense(UiLicenseFeatureType.Adm);
    se := Mb.Security;
    Description.CheckAndAudit(CustomClass.Key, 
"Check access permissions for operation");
    Al := se.OpenAuditLog;
    ALogs := AL.OpenLogons(
False);
    AOperat := AL.OpenOperations(ALogs.Session);
    
For i := 0 To 4 Do
        Debug.WriteLine(
"Object: " + AOperat.ObjectName);
        Debug.WriteLine(
"Operation: " + AOperat.Name);
        Debug.WriteLine(
"Succeeded: " + AOperat.Succeeded.ToString);
        Debug.WriteLine(
"Comment: " + AOperat.Comment);
        Debug.WriteLine(
"--------");
        AOperat.Next;
    
End For;
    Lic := 
Null;
End Sub UserProc;

After executing the example a custom class container that contains the My_Class class will be created. An identifier of the string resource ID_CUSTOM_EXTENDER from the OBJ_RES resources will be determined for the container. One operation will be determined for the class. An object of the My_Class class will be created in the repository. The C:\Icon_large.ico file is a source of a large icon, the C:\Icon_small.ico file is a source of a small icon. Access permissions on a class operation will be checked for an object, results will be written in access protocol. Five last records of the protocol will be displayed in the console window.

See also:

Examples | IMetabaseCustomExtender | IMetabaseCustomClass | IMetabaseCustomClassOperation | IMetabaseCustomObject