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-- File: SelectRange.cdl
-- Created: Wed Nov 18 10:20:51 1992
-- Author: Christian CAILLET
-- <cky@topsn2>
---Copyright: Matra Datavision 1992
class SelectRange from IFSelect inherits SelectExtract
---Purpose : A SelectRange keeps or rejects a sub-set of the input set,
-- that is the Entities of which rank in the iteration list
-- is in a given range (for instance form 2nd to 6th, etc...)
uses AsciiString from TCollection, InterfaceModel, IntParam
raises DomainError
is
Create returns mutable SelectRange;
---Purpose : Creates a SelectRange. Default is Take all the input list
SetRange (me : mutable; rankfrom, rankto : mutable IntParam)
raises DomainError;
---Purpose : Sets a Range for numbers, with a lower and a upper limits
-- Error if rankto is lower then rankfrom
SetOne (me : mutable; rank : mutable IntParam);
---Purpose : Sets a unique number (only one Entity will be sorted as True)
SetFrom (me : mutable; rankfrom : mutable IntParam);
---Purpose : Sets a Lower limit but no upper limit
SetUntil (me : mutable; rankto : mutable IntParam);
---Purpose : Sets an Upper limit but no lower limit (equivalent to lower 1)
HasLower (me) returns Boolean;
---Purpose : Returns True if a Lower limit is defined
Lower (me) returns mutable IntParam;
---Purpose : Returns Lower limit (if there is; else, value is senseless)
LowerValue (me) returns Integer;
---Purpose : Returns Value of Lower Limit (0 if none is defined)
HasUpper (me) returns Boolean;
---Purpose : Returns True if a Lower limit is defined
Upper (me) returns mutable IntParam;
---Purpose : Returns Upper limit (if there is; else, value is senseless)
UpperValue (me) returns Integer;
---Purpose : Returns Value of Upper Limit (0 if none is defined)
Sort (me; rank : Integer; ent : Transient; model : InterfaceModel)
returns Boolean;
---Purpose : Returns True for an Entity of which occurence number in the
-- iteration is inside the selected Range (considers <rank>)
ExtractLabel (me) returns AsciiString from TCollection;
---Purpose : Returns a text defining the criterium : following cases,
-- " From .. Until .." or "From .." or "Until .." or "Rank no .."
fields
thelower : IntParam;
theupper : IntParam;
end SelectRange;
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