JSON/jf_test_3 [ Unittest ]
NAME
jf_test_3
DESCRIPTION
Third unit test
USES
json_module iso_fortran_env (intrinsic)
HISTORY
Izaak Beekman : 2/18/2015 : Created (refactoried original json_example.f90 file)
LICENSE
JSON-FORTRAN: A Fortran 2008 JSON API
https://github.com/jacobwilliams/json-fortran
Copyright (c) 2014, Jacob Williams
All rights reserved.
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SOURCE
51 module jf_test_3_mod 52 53 use json_module 54 use, intrinsic :: iso_fortran_env , only: error_unit, output_unit, wp => real64 55 56 implicit none 57 58 character(len=*),parameter :: dir = '../files/' !working directory 59 character(len=*),parameter :: filename2 = 'test2.json' 60 61 contains 62 63 subroutine test_3(error_cnt) 64 65 ! Read the file generated in jf_test_2, and extract some data from it. 66 67 implicit none 68 69 integer,intent(out) :: error_cnt 70 integer :: ival 71 character(len=:),allocatable :: cval 72 real(wp) :: rval 73 type(json_file) :: json !the JSON structure read from the file: 74 integer :: i 75 character(len=10) :: str 76 real(wp),dimension(:),allocatable :: rvec 77 78 error_cnt = 0 79 call json_initialize() 80 if (json_failed()) then 81 call json_print_error_message(error_unit) 82 error_cnt = error_cnt + 1 83 end if 84 85 write(error_unit,'(A)') '' 86 write(error_unit,'(A)') '=================================' 87 write(error_unit,'(A)') ' EXAMPLE 3' 88 write(error_unit,'(A)') '=================================' 89 write(error_unit,'(A)') '' 90 91 ! parse the json file: 92 write(error_unit,'(A)') '' 93 write(error_unit,'(A)') 'parsing file: '//dir//filename2 94 95 call json%load_file(filename = dir//filename2) 96 97 if (json_failed()) then !if there was an error reading the file 98 99 call json_print_error_message(error_unit) 100 error_cnt = error_cnt + 1 101 102 else 103 104 write(error_unit,'(A)') '' 105 write(error_unit,'(A)') 'reading data from file...' 106 !get scalars: 107 write(error_unit,'(A)') '' 108 call json%get('inputs.integer_scalar', ival) 109 if (json_failed()) then 110 call json_print_error_message(error_unit) 111 error_cnt = error_cnt + 1 112 else 113 write(error_unit,'(A,1X,I5)') 'inputs.integer_scalar = ',ival 114 end if 115 !get one element from a vector: 116 write(error_unit,'(A)') '' 117 call json%get('trajectory(1).DATA(2)', rval) 118 if (json_failed()) then 119 call json_print_error_message(error_unit) 120 error_cnt = error_cnt + 1 121 else 122 write(error_unit,'(A,1X,F30.16)') 'trajectory(1).DATA(2) = ',rval 123 end if 124 !get vectors: 125 do i=1,4 126 127 write(str,fmt='(I10)') i 128 str = adjustl(str) 129 130 write(error_unit,'(A)') '' 131 call json%get('trajectory('//trim(str)//').VARIABLE', cval) 132 if (json_failed()) then 133 134 call json_print_error_message(error_unit) 135 error_cnt = error_cnt + 1 136 137 else 138 139 write(error_unit,'(A)') 'trajectory('//trim(str)//').VARIABLE = '//trim(cval) 140 141 !...get the vector using the callback method: 142 call json%get('trajectory('//trim(str)//').DATA', rvec) 143 if (json_failed()) then 144 call json_print_error_message(error_unit) 145 error_cnt = error_cnt + 1 146 else 147 write(error_unit,'(A,1X,*(F30.16,1X))') 'trajectory('//trim(str)//').DATA = ',rvec 148 end if 149 150 end if 151 152 end do 153 154 end if 155 156 ! clean up 157 write(error_unit,'(A)') '' 158 write(error_unit,'(A)') 'destroy...' 159 call json%destroy() 160 if (json_failed()) then 161 call json_print_error_message(error_unit) 162 error_cnt = error_cnt + 1 163 end if 164 165 end subroutine test_3 166 167 end module jf_test_3_mod 168 169 program jf_test_3 170 use jf_test_3_mod , only: test_3 171 implicit none 172 integer :: n_errors 173 n_errors = 0 174 call test_3(n_errors) 175 if (n_errors /= 0) stop 1 176 end program jf_test_3