filter.f90

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! (sorry about the naming convention of filter vs filters, I want the
! name "filters" for this eventually)
module filter
  use num_types, only : rp
  use json_module, only : json_file
  use coefs, only : coef_t
  use json_utils, only : json_get_or_default, json_get
  use field, only: field_t
  implicit none
  private
 
  type, abstract, public :: filter_t
     type(coef_t), pointer :: coef => null()
 
   contains
     procedure, pass(this) :: init_base => filter_init_base
     procedure, pass(this) :: free_base => filter_free_base
     procedure(filter_init), pass(this), deferred :: init
     procedure(filter_free), pass(this), deferred :: free
     procedure(filter_apply), pass(this), deferred :: apply
  end type filter_t
 
 
 
 
  abstract interface
 
     subroutine filter_init(this, json, coef)
       import filter_t, json_file, coef_t
       class(filter_t), intent(inout) :: this
       type(json_file), intent(inout) :: json
       type(coef_t), intent(in) :: coef
     end subroutine filter_init
  end interface
 
  abstract interface
 
     subroutine filter_free(this)
       import filter_t
       class(filter_t), intent(inout) :: this
     end subroutine filter_free
  end interface
 
  abstract interface
 
     subroutine filter_apply(this, F_out, F_in)
       import filter_t, field_t
       class(filter_t), intent(inout) :: this
       type(field_t), intent(in) :: F_in
       type(field_t), intent(inout) :: F_out
     end subroutine filter_apply
  end interface
 
  interface
 
     module subroutine filter_factory(object, type_name, json, coef)
       class(filter_t), allocatable, intent(inout) :: object
       character(len=*), intent(in) :: type_name
       type(coef_t), intent(in) :: coef
       type(json_file), intent(inout) :: json
     end subroutine filter_factory
  end interface
 
  public :: filter_factory
 
contains
  subroutine filter_init_base(this, json, coef)
    class(filter_t), intent(inout) :: this
    type(json_file), intent(inout) :: json
    type(coef_t), intent(in), target :: coef
 
    this%coef => coef
 
  end subroutine filter_init_base
 
  subroutine filter_free_base(this)
    class(filter_t), intent(inout) :: this
 
    nullify(this%coef)
  end subroutine filter_free_base
 
 
 
end module filter