-- File:	TDF_DataSet.cdl
--      	---------------
-- Author:	DAUTRY Philippe
--		<fid@fox.paris1.matra-dtv.fr>
---Copyright:	 MATRA DATAVISION 1997

---Version:	0.0
---History:	Version	Date		Purpose
--		0.0	Mar 11 1997	Creation


class DataSet from TDF
    inherits TShared from MMgt

	---Purpose: This class is a set of TDF informations like
	--          labels and attributes.

uses

    OStream              from Standard,
    Label                from TDF,
    Attribute            from TDF,
    LabelList            from TDF,
    LabelMap             from TDF,
    AttributeMap         from TDF

-- raises

is

    Create
    	returns mutable DataSet from TDF;
	---Purpose: Creates an  empty   DataSet  object.

    Clear(me : mutable);
	---Purpose: Clears all information.

    IsEmpty(me) returns Boolean from Standard;
	---Purpose: Returns true if there is at least one label or one
	--          attribute.
	---C++: inline

    -- Label set informations

    AddLabel(me : mutable;
    	     aLabel : Label from TDF);
	---Purpose: Adds <aLabel> in  the  current  data  set.
	---C++: inline

    ContainsLabel(me; aLabel : Label from TDF)
    	returns Boolean from Standard;
	---Purpose: Returns true if the label  <alabel>   is in the data set.
	---C++: inline

    Labels(me : mutable)
    	returns LabelMap from TDF;
	---Purpose: Returns the map of labels in this data set.
    	-- This map can be used directly, or updated.
	--          
	---C++: inline
	---C++: return &


    -- Attribute set informations

    AddAttribute(me : mutable;
    	     	 anAttribute : Attribute from TDF);
	---Purpose: Adds <anAttribute> into the current data  set.
	---C++: inline

    ContainsAttribute(me; anAttribute : Attribute from TDF)
    	returns Boolean from Standard;
	---Purpose: Returns true if <anAttribute> is in the data set.
	---C++: inline

    Attributes(me : mutable)
    	returns AttributeMap from TDF;
	---Purpose: Returns the map of attributes in the  current  data   set.
    	--  This map can be used directly, or updated.
	--          
	---C++: inline
	---C++: return &

    -- Root informations

    AddRoot(me : mutable; aLabel : Label from TDF);
	---Purpose: Adds a root label to <myRootLabels>.
	--          
	---C++: inline

    Roots(me : mutable)
    	returns LabelList from TDF;
	---Purpose: Returns <myRootLabels> to be used or updated.
	--          
	---C++: inline
	---C++: return &

    -- Miscellaneous

    Dump(me; anOS : in out OStream from Standard)
    	returns OStream from Standard;
	---Purpose: Dumps the minimum information about <me> on
	--          <aStream>.
	--          
	---C++: return &
    	---C++: alias operator<<

fields

    myRootLabels      : LabelList     from TDF;
    myLabelMap        : LabelMap      from TDF;
    myAttributeMap    : AttributeMap  from TDF;

end DataSet;