-- File:	AndFilter.cdl
-- Created:	Mon Dec  4 17:45:11 1995
-- Author:	Stephane MORTAUD
--		<smo@gibson>
---Copyright:	 Matra Datavision 1995


class AndFilter from SelectMgr inherits CompositionFilter from SelectMgr

	---Purpose: A framework to define a selection filter for two or
    	-- more types of entity.

uses

    Filter       from SelectMgr,
    Transient    from Standard,
    Boolean      from Standard,
    EntityOwner  from SelectMgr
is

    Create
    returns mutable AndFilter from SelectMgr;
    	--- Purpose: Constructs an empty selection filter object for two or
    	-- more types of entity.   
    
    IsOk(me; anobj :EntityOwner from SelectMgr)
    returns Boolean from Standard ;

end AndFilter;