Populate a JSON structure and write it to a file.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| integer, | intent(out) | :: | error_cnt |
subroutine test_2(error_cnt)
!! Populate a JSON structure and write it to a file.
implicit none
integer,intent(out) :: error_cnt
type(json_value),pointer :: p, inp, traj, tmp1, tmp2, p_tmp, p_integer_array, p_clone
type(json_core) :: json !! factory for manipulating `json_value` pointers
integer :: iunit
character(kind=json_CK,len=:),allocatable :: name
integer :: ival,ival_clone
logical :: found
logical :: is_valid
character(kind=json_CK,len=:),allocatable :: error_msg
write(error_unit,'(A)') ''
write(error_unit,'(A)') '================================='
write(error_unit,'(A)') ' EXAMPLE 2'
write(error_unit,'(A)') '================================='
write(error_unit,'(A)') ''
error_cnt = 0
call json%initialize()
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
!root:
call json%create_object(p,dir//filename2) ! create the value and associate the pointer
! add the file name as the name of the overall structure
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
write(error_unit,'(A)') ''
write(error_unit,'(A)') 'initialize the structure...'
!config structure:
call json%create_object(inp,'inputs') !an object
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(p, inp)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
!test get_parent:
call json%get_parent(inp,tmp1) !will be root
call json%get_parent(tmp1,tmp2) !has no parent -> null()
!trajectory structure:
call json%create_array(traj,'trajectory') !an array
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(p, traj)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
write(error_unit,'(A)') ''
write(error_unit,'(A)') 'adding some data to structure...'
!add some variables:
!input variables:
call json%add(inp, 't0', 0.1_wp)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'tf', 1.1_wp)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'x0', 9999.000_wp)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'integer_scalar', 1)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'integer_array', [2,4,99])
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'names', ['aaa','bbb','ccc'])
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'logical_scalar', .true.)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'logical_vector', [.true., .false., .true.])
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
call json%add(inp, 'null_variable')
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
nullify(inp)
!trajectory variables:
call add_variables_to_input(json, traj, 'Rx', 'km', 'J2000', 'EARTH', [1.0_wp, 2.0_wp, 3.0_wp], error_cnt )
call add_variables_to_input(json, traj, 'Ry', 'km', 'J2000', 'EARTH', [10.0_wp, 20.0_wp, 30.0_wp], error_cnt )
call add_variables_to_input(json, traj, 'Rz', 'km', 'J2000', 'EARTH', [100.0_wp, 200.0d0, 300.0_wp], error_cnt )
call add_variables_to_input(json, traj, 'Vx', 'km/s', 'J2000', 'EARTH', [1.0e-3_wp, 2.0e-3_wp, 3.0e-3_wp], error_cnt )
call add_variables_to_input(json, traj, 'Vy', 'km/s', 'J2000', 'EARTH', [2.0e-3_wp, 20.0e-3_wp, 3.0e-3_wp], error_cnt )
call add_variables_to_input(json, traj, 'Vz', 'km/s', 'J2000', 'EARTH', [3.0e-3_wp, 30.0e-3_wp, 40.0e-3_wp], error_cnt )
nullify(traj)
!validate it:
write(error_unit,'(A)') ''
write(error_unit,'(A)') 'validating...'
call json%validate(p,is_valid,error_msg)
if (.not. is_valid) then
write(error_unit,'(A)') 'Error: p is not a valid JSON linked list: '//error_msg
error_cnt = error_cnt + 1
end if
write(error_unit,'(A)') ''
write(error_unit,'(A)') 'writing file '//trim(dir//filename2)//'...'
open(newunit=iunit, file=dir//filename2, status='REPLACE')
call json%print(p,iunit)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
close(iunit)
!test the deep copy routine:
write(error_unit,'(A)') 'json_clone test'
call json%clone(p,p_clone)
write(error_unit,'(A)') ''
write(error_unit,'(A)') '============='
write(error_unit,'(A)') ' p_clone'
write(error_unit,'(A)') '============='
call json%print(p_clone,error_unit)
write(error_unit,'(A)') '============='
write(error_unit,'(A)') ''
if (.not. associated(p)) write(error_unit,'(A)') 'ERROR: p has become unassociated'
if (.not. associated(p_clone)) write(error_unit,'(A)') 'ERROR: p_clone is not associated'
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
!now, change one and verify that they are independent:
call json%update(p_clone,'inputs.integer_scalar',100,found)
if (json%failed()) write(error_unit,'(A)') 'json%update Error for p_clone'
call json%get(p,'inputs.integer_scalar',ival)
if (json%failed()) write(error_unit,'(A)') 'json%get Error for p'
call json%get(p_clone,'inputs.integer_scalar',ival_clone)
if (json%failed()) write(error_unit,'(A)') 'json%get Error for p_clone'
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
if (ival==1 .and. ival_clone==100) then
write(error_unit,'(A)') 'json%clone ... passed'
else
write(error_unit,'(A)') 'Error: ival /= ival_clone'
error_cnt = error_cnt + 1
end if
end if
end if
!test some of the pointer routines:
write(error_unit,'(A)') 'Pointer routine tests'
call json%get(p,'inputs.integer_array',p_integer_array)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
!get parent test:
call json%get_parent(p_integer_array,p_tmp) !should be "inputs"
call json%info(p_tmp,name=name)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
if (name=='inputs') then
write(error_unit,'(A)') 'json%get_parent ... passed'
else
write(error_unit,'(A)') 'Error: parent should be "inputs", is actually: '//trim(name)
error_cnt = error_cnt + 1
end if
end if
!get next test:
call json%get_next(p_integer_array,p_tmp) !should be "names"
call json%info(p_tmp,name=name)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
if (name=='names') then
write(error_unit,'(A)') 'json%get_next ... passed'
else
write(error_unit,'(A)') 'Error: next should be "names", is actually: '//trim(name)
error_cnt = error_cnt + 1
end if
end if
!get previous test:
call json%get_previous(p_integer_array,p_tmp) !should be "integer_scalar"
call json%info(p_tmp,name=name)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
if (name=='integer_scalar') then
write(error_unit,'(A)') 'json%get_previous ... passed'
else
write(error_unit,'(A)') 'Error: next should be "integer_scalar", is actually: '//trim(name)
error_cnt = error_cnt + 1
end if
end if
!get tail test:
call json%get_tail(p_integer_array,p_tmp) !should be 99, the last element in the array
call json%get(p_tmp,ival)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
else
if (ival==99) then
write(error_unit,'(A)') 'json%get_tail ... passed'
else
write(error_unit,'(A,1X,I5)') 'Error: tail value should be 99, is actually: ',ival
error_cnt = error_cnt + 1
end if
end if
end if
!cleanup:
call json%destroy(p)
if (json%failed()) then
call json%print_error_message(error_unit)
error_cnt = error_cnt + 1
end if
write(error_unit,'(A)') ''
end subroutine test_2