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| 1 | +note |
| 2 | + description: "Base class for error gestion" |
| 3 | + author: "Philippe Gachoud" |
| 4 | + date: "$Date$" |
| 5 | + revision: "$Revision$" |
| 6 | + |
| 7 | +class |
| 8 | + FALLIBLE |
| 9 | + |
| 10 | +inherit |
| 11 | + LOGGABLE |
| 12 | + redefine |
| 13 | + default_create, |
| 14 | + out |
| 15 | + end |
| 16 | + |
| 17 | + |
| 18 | +feature {NONE} -- Initialization |
| 19 | + |
| 20 | + default_create |
| 21 | + do |
| 22 | + Precursor |
| 23 | + create warnings.make |
| 24 | + end |
| 25 | + |
| 26 | + make_from_separate (other: separate like Current) |
| 27 | + do |
| 28 | +-- Precursor (other) |
| 29 | + create warnings.make |
| 30 | + if attached other.last_error as l_e then |
| 31 | + create last_error.make_from_separate (l_e) |
| 32 | + end |
| 33 | + if attached other.last_success_message as l_e then |
| 34 | + create last_success_message.make_from_separate (l_e) |
| 35 | + end |
| 36 | + end |
| 37 | + |
| 38 | +feature -- Access |
| 39 | + |
| 40 | + warnings: LINKED_LIST[STRING] |
| 41 | + |
| 42 | + last_error: detachable EG_SHEET_ERROR |
| 43 | + -- Last error |
| 44 | + |
| 45 | + last_success_message: detachable STRING |
| 46 | + -- If any |
| 47 | + |
| 48 | + |
| 49 | +feature -- Status report |
| 50 | + |
| 51 | + has_error: BOOLEAN |
| 52 | + -- Based on last_error |
| 53 | + do |
| 54 | + Result := last_error /= Void |
| 55 | + end |
| 56 | + |
| 57 | + has_warnings: BOOLEAN |
| 58 | + do |
| 59 | + Result := warnings.is_empty |
| 60 | + end |
| 61 | + |
| 62 | + is_valid: BOOLEAN |
| 63 | + do |
| 64 | + Result := not has_error |
| 65 | + end |
| 66 | + |
| 67 | +feature -- Output |
| 68 | + |
| 69 | + out: STRING |
| 70 | + do |
| 71 | + Result := generating_type.out + ": Fallible, error_status:" + has_error.out |
| 72 | + if attached last_error as l_err then |
| 73 | + Result.append (l_err.out) |
| 74 | + end |
| 75 | + if attached last_success_message as l_msg then |
| 76 | + Result.append (l_msg) |
| 77 | + end |
| 78 | + end |
| 79 | + |
| 80 | + |
| 81 | +feature -- Status setting |
| 82 | + |
| 83 | + set_last_error_from_fallible (o: FALLIBLE) |
| 84 | + require |
| 85 | + attached o.last_error |
| 86 | + do |
| 87 | + last_error := o.last_error |
| 88 | + last_success_message := Void |
| 89 | + ensure |
| 90 | + attached o.last_error implies last_success_message = Void |
| 91 | + end |
| 92 | + |
| 93 | + set_last_error_from_fallible_sep (other: separate FALLIBLE) |
| 94 | + require |
| 95 | + attached other.last_error |
| 96 | + do |
| 97 | + if attached other.last_error as l_le then |
| 98 | + last_error := {EG_SHEET_ERROR}.error_from_separate (l_le) |
| 99 | + last_success_message := Void |
| 100 | + else |
| 101 | + last_error := Void |
| 102 | + end |
| 103 | + ensure |
| 104 | + attached other.last_error implies last_success_message = Void |
| 105 | + end |
| 106 | + |
| 107 | + set_last_error (an_error: like last_error) |
| 108 | + do |
| 109 | + last_error:= an_error |
| 110 | + if attached an_error then |
| 111 | + last_success_message := Void |
| 112 | + logger.write_warning ("Class: " + generating_type.out + " set_last_error-> Error setted: " + an_error.message) |
| 113 | + end |
| 114 | + ensure |
| 115 | + attached an_error implies last_success_message = Void |
| 116 | + has_error |
| 117 | + end |
| 118 | + |
| 119 | + set_last_success_message_from_fallible (o: attached like Current) |
| 120 | + require |
| 121 | + attached o.last_success_message |
| 122 | + do |
| 123 | + last_success_message := o.last_success_message |
| 124 | + last_error := Void |
| 125 | + ensure |
| 126 | + attached o.last_success_message implies last_error = Void |
| 127 | + end |
| 128 | + |
| 129 | + set_last_success_message (a_msg: attached like last_success_message) |
| 130 | + do |
| 131 | + last_success_message := a_msg |
| 132 | + last_error := Void |
| 133 | + ensure |
| 134 | + attached a_msg implies last_error = Void |
| 135 | + end |
| 136 | + |
| 137 | + wipe_last_error |
| 138 | + -- Once you consider having treated it |
| 139 | + do |
| 140 | + last_error := Void |
| 141 | + ensure |
| 142 | + last_error = Void |
| 143 | + end |
| 144 | + |
| 145 | + wipe_last_success_message |
| 146 | + do |
| 147 | + last_success_message := Void |
| 148 | + ensure |
| 149 | + last_success_message = Void |
| 150 | + end |
| 151 | + |
| 152 | + extend_warnings (v: like warnings.item) |
| 153 | + do |
| 154 | + logger.write_warning (v) |
| 155 | + warnings.extend (v) |
| 156 | + end |
| 157 | + |
| 158 | +invariant |
| 159 | + never_both_attached: not (attached last_error and attached last_success_message) |
| 160 | + is_valid implies not has_error |
| 161 | + has_error implies not is_valid |
| 162 | +end |
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