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--
-- File : Group.cdl
-- Created : Sat 9 Jan 1993
-- Author : CKY / Contract Toubro-Larsen ( Arun MENON )
--
---Copyright : MATRA-DATAVISION 1993
--
class Group from IGESBasic inherits IGESEntity
---Purpose: defines Group, Type <402> Form <1>
-- in package IGESBasic
-- The Group Associativity allows a collection of a set
-- of entities to be maintained as a single, logical
-- entity
--
-- Group, OrderedGroup, GroupWithoutBackP, OrderedGroupWithoutBackP
-- share the same definition (class Group), form number changes
--
-- non Ordered, non WithoutBackP : form 1
-- non Ordered, WithoutBackP : form 7
-- Ordered, non WithoutBackP : form 14
-- Ordered, WithoutBackP : form 15
uses
Transient ,
IGESEntity from IGESData,
HArray1OfIGESEntity from IGESData
raises OutOfRange
is
Create returns mutable Group;
Create (nb : Integer) returns Group;
---Purpose : Creates a Group with a predefined count of items
-- (which all start as null)
-- Specific Methods pertaining to the class
Init (me : mutable;
allEntities : HArray1OfIGESEntity);
---Purpose : This method is used to set the fields of the class Group
-- - allEntities : Used to store pointers to members of
-- the Group.
SetOrdered (me : mutable; mode : Boolean);
---Purpose : Sets a Group to be, or not to be Ordered (according mode)
SetWithoutBackP (me : mutable; mode : Boolean);
---Purpose : Sets a Group to be, or not to be WithoutBackP
IsOrdered (me) returns Boolean;
---Purpose : Returns True if <me> is Ordered
IsWithoutBackP (me) returns Boolean;
---Purpose : Returns True if <me> is WithoutBackP
SetUser (me : mutable; type, form : Integer)
---Purpose : Enforce a new value for the type and form
raises OutOfRange;
-- The type number must be greater than 5000
SetNb (me : mutable; nb : Integer);
---Purpose : Changes the count of item
-- If greater, new items are null
-- If lower, old items are lost
NbEntities (me) returns Integer;
---Purpose : returns the number of IGESEntities in the Group
Entity (me; Index : Integer) returns IGESEntity
---Purpose : returns the specific entity from the Group
raises OutOfRange;
-- raises exception if Index <= 0 or Index > NbEntities()
Value (me; Index : Integer) returns Transient
---Purpose : returns the specific entity from the Group
raises OutOfRange;
-- raises exception if Index <= 0 or Index > NbEntities()
SetValue (me : mutable; Index : Integer; ent : IGESEntity from IGESData)
---Purpose : Sets a new value for item <Index>
raises OutOfRange;
-- raises exception if Index <= 0 or Index > NbEntities()
fields
--
-- Class : IGESBasic_Group
--
-- Purpose : Declaration of variables specific to the definition
-- of the Class Group.
--
-- Reminder : A Group instance is defined by :
-- - an array of IGESEntity
theEntities : HArray1OfIGESEntity;
end Group;
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