1 | unit UObjectString;
|
---|
2 |
|
---|
3 | interface
|
---|
4 |
|
---|
5 | uses
|
---|
6 | SysUtils, UObjectTypeBase, UObjectBoolean, UObjectInteger, StrUtils;
|
---|
7 |
|
---|
8 | type
|
---|
9 | TString = class(TInterfacedObject, IAssignable, IComparable)
|
---|
10 | Value: string;
|
---|
11 | procedure Assign(Source: TInterfacedObject);
|
---|
12 | function EqualTo(Operand: IComparable): TBoolean;
|
---|
13 | function HigherThen(Operand: TInterfacedObject): TBoolean;
|
---|
14 | function LowerThan(Operand: TInterfacedObject): TBoolean;
|
---|
15 | function Length: TInteger;
|
---|
16 | procedure UpperCase;
|
---|
17 | procedure LowerCase;
|
---|
18 | procedure Delete(Index: TInteger; Count: TInteger);
|
---|
19 | procedure Insert(Index: TInteger; SubString: TString);
|
---|
20 | function Pos(SubString: TString): TInteger;
|
---|
21 | procedure Reverse;
|
---|
22 | function LeftString(Count: TInteger): TString;
|
---|
23 | function RightString(Count: TInteger): TString;
|
---|
24 | end;
|
---|
25 |
|
---|
26 | implementation
|
---|
27 |
|
---|
28 | { TString }
|
---|
29 |
|
---|
30 | procedure TString.Assign(Source: TInterfacedObject);
|
---|
31 | begin
|
---|
32 |
|
---|
33 | end;
|
---|
34 |
|
---|
35 | procedure TString.Delete(Index, Count: TInteger);
|
---|
36 | begin
|
---|
37 | System.Delete(Value, Index.Value, Count.Value);
|
---|
38 | end;
|
---|
39 |
|
---|
40 | function TString.EqualTo(Operand: IComparable): TBoolean;
|
---|
41 | begin
|
---|
42 | if TInterfacedObject(Operand) is TString then begin
|
---|
43 | Result := TBoolean.Create;
|
---|
44 | Result.Value := Value = TString(Operand).Value;
|
---|
45 | end else raise EInvalidCast.Create('Typecast error.');
|
---|
46 | end;
|
---|
47 |
|
---|
48 | function TString.HigherThen(Operand: TInterfacedObject): TBoolean;
|
---|
49 | begin
|
---|
50 |
|
---|
51 | end;
|
---|
52 |
|
---|
53 | procedure TString.Insert(Index: TInteger; SubString: TString);
|
---|
54 | begin
|
---|
55 | System.Insert(SubString.Value, Value, Index.Value);
|
---|
56 | end;
|
---|
57 |
|
---|
58 | function TString.LeftString(Count: TInteger): TString;
|
---|
59 | begin
|
---|
60 | Result := TString.Create;
|
---|
61 | Result.Value := StrUtils.LeftStr(Value, Count.Value);
|
---|
62 | end;
|
---|
63 |
|
---|
64 | function TString.Length: TInteger;
|
---|
65 | begin
|
---|
66 | Result.Value := System.Length(Value);
|
---|
67 | end;
|
---|
68 |
|
---|
69 | procedure TString.LowerCase;
|
---|
70 | begin
|
---|
71 | Value := SysUtils.LowerCase(Value);
|
---|
72 | end;
|
---|
73 |
|
---|
74 | function TString.LowerThan(Operand: TInterfacedObject): TBoolean;
|
---|
75 | begin
|
---|
76 |
|
---|
77 | end;
|
---|
78 |
|
---|
79 | function TString.Pos(SubString: TString): TInteger;
|
---|
80 | begin
|
---|
81 | Result := TInteger.Create;
|
---|
82 | Result.Value := System.Pos(SubString.Value, Value);
|
---|
83 | end;
|
---|
84 |
|
---|
85 | procedure TString.Reverse;
|
---|
86 | begin
|
---|
87 | Value := StrUtils.ReverseString(Value);
|
---|
88 | end;
|
---|
89 |
|
---|
90 | function TString.RightString(Count: TInteger): TString;
|
---|
91 | begin
|
---|
92 | Result := TString.Create;
|
---|
93 | Result.Value := StrUtils.RightStr(Value, Count.Value);
|
---|
94 | end;
|
---|
95 |
|
---|
96 | procedure TString.UpperCase;
|
---|
97 | begin
|
---|
98 | Value := SysUtils.UpperCase(Value);
|
---|
99 | end;
|
---|
100 |
|
---|
101 |
|
---|
102 | end.
|
---|