-- File:	StepData_Simple.cdl
-- Created:	Fri May  9 16:17:26 1997
-- Author:	Christian CAILLET
--		<cky@heliox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1997


class Simple  from StepData    inherits Described from StepData

    ---Purpose : A Simple Entity is defined by a type (which can heve super
    --           types) and a list of parameters

uses CString,
     Check from Interface,  EntityIterator from Interface,
     ESDescr from StepData,
     Field from StepData, FieldListN from StepData

raises InterfaceMismatch

is

    Create (descr : ESDescr) returns mutable Simple;
    ---Purpose : Creates a Simple Entity

    ESDescr (me) returns ESDescr;
    ---Purpose : Returns description, as for simple

    StepType (me) returns CString;
    ---Purpose : Returns the recorded StepType (TypeName of its ESDescr)

    	--  inherited

    IsComplex (me) returns Boolean;
    ---Purpose : Returns False


    Matches (me; steptype : CString) returns Boolean;
    ---Purpose : Tells if a step type is matched by <me>
    --           For a Simple Entity : own type or super type
    --           For a Complex Entity : one of the members

    As (me; steptype : CString) returns mutable Simple;
    ---Purpose : Returns a Simple Entity which matches with a Type in <me> :
    --           For a Simple Entity : me if it matches, else a null handle
    --           For a Complex Entity : the member which matches, else null

    HasField (me; name : CString) returns Boolean;
    ---Purpose : Tells if a Field brings a given name

    Field (me; name : CString) returns Field
    ---Purpose : Returns a Field from its name; read-only
    	raises InterfaceMismatch;
    --           raises if no Field for <name>
    ---C++ : return const &

    CField (me : mutable; name : CString) returns Field
    ---Purpose : Returns a Field from its name; read or write
    	raises InterfaceMismatch;
    --           raises if no Field for <name>
    ---C++ : return &

    	--  more specific

    NbFields (me) returns Integer;
    ---Purpose : Returns the count of fields

    FieldNum (me; num : Integer) returns Field;
    ---Purpose : Returns a field from its rank, for read-only use
    ---C++ : return const &

    CFieldNum (me : mutable; num : Integer) returns Field;
    ---Purpose : Returns a field from its rank, in order to modify it
    ---C++ : return &

    Fields (me) returns FieldListN;
    ---Purpose : Returns the entire field list, read-only
    ---C++ : return const &

    CFields (me : mutable) returns FieldListN;
    ---Purpose : Returns the entire field list, read or write
    ---C++ : return &

    	--

    Check  (me; ach  : in out Check from Interface);
    ---Purpose : Fills a Check by using its Description

    Shared (me; list : in out EntityIterator from Interface);
    ---Purpose : Fills an EntityIterator with entities shared by <me>

fields

    thefields : FieldListN;

end Simple;