-- File:	Storage_RootData.cdl
-- Created:	Thu Feb  6 17:00:10 1997
-- Author:	Kernel
--		<kernel@parigox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1997

class RootData from Storage

inherits TShared from MMgt

uses SequenceOfAsciiString from TColStd,
     AsciiString from TCollection,
     MapOfPers from Storage,
     HSeqOfRoot from Storage,
     Error from Storage,
     Root from Storage
     
raises NoSuchObject from Standard

is

    Create returns mutable RootData from Storage;
    
    NumberOfRoots(me) returns Integer from Standard;
    ---Purpose: returns the number of roots.

    AddRoot(me : mutable;  aRoot : Root from Storage);
    ---Purpose: add a root to <me>. If a root with same name is present, it
    --          will be replaced by <aRoot>.
    
    Roots(me) returns mutable HSeqOfRoot from Storage;
    
    Find(me; aName : AsciiString from TCollection) returns mutable Root from Storage;
    ---Purpose: find a root with name <aName>.
    
    IsRoot(me; aName : AsciiString from TCollection) returns Boolean from Standard;
    ---Purpose: returns Standard_True if <me> contains a root named <aName>
    
    RemoveRoot(me : mutable; aName : AsciiString from TCollection);
    ---Purpose: remove the root named <aName>.

    ErrorStatus(me) returns Error from Storage;
    ErrorStatusExtension(me) returns AsciiString from TCollection;
    
    ClearErrorStatus(me : mutable);
    
    -- PRIVATE

    UpdateRoot(me : mutable; aName : AsciiString from TCollection; aPers : mutable Persistent from Standard) 
    raises NoSuchObject
    is private;

    SetErrorStatus(me : mutable; anError : Error from Storage) is private;
    SetErrorStatusExtension(me : mutable; anErrorExt : AsciiString from TCollection) is private;    

    fields
    
      myObjects            : MapOfPers from Storage;
      myErrorStatus        : Error from Storage;
      myErrorStatusExt     : AsciiString      from TCollection;
      
    friends class Schema from Storage
    
end;