| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit WebSite.List;
interface
uses
Boolean,
Integer._32,
Iterator,
Object_.List,
Text,
Thread.Lock,
WebSite;
type
TWebSiteList = class(TObject)
protected
WebSites: TObjectList<TWebSite>;
function GetWebSite(Index: TInteger32): TWebSite; virtual;
function BinarySearch(Name: TText): TInteger32;
public
constructor Create(); virtual;
destructor Destroy(); override;
procedure Add(WebSite: TWebSite); virtual;
procedure Remove(WebSite: TWebSite); virtual;
function Count(): TInteger32; virtual;
function FindWithName(Name: TText): TWebSite; virtual;
function CreateIterator(): TIterator<TWebSite>; virtual;
property WebSite[Index: TInteger32]: TWebSite read GetWebSite; default;
end;
TDefaultWebSiteListIterator = class(TIterator<TWebSite>)
protected
i: TInteger32;
WebSites: TWebSiteList;
function GetCurrent(): TWebSite; override;
public
constructor Create(WebSites: TWebSiteList); reintroduce; virtual;
function IsValid(): TBoolean; override;
procedure GotoNext(); override;
end;
TSynchronizedWebSiteList = class;
TSynchronizedWebSiteListIterator = class(TIterator<TWebSite>)
protected
i: TInteger32;
WebSites: TWebSiteList;
Lock: TThreadLock;
function GetCurrent(): TWebSite; override;
public
constructor Create(WebSites: TWebSiteList; Lock: TThreadLock); reintroduce; virtual;
destructor Destroy(); override;
function IsValid(): TBoolean; override;
procedure GotoNext(); override;
end;
TSynchronizedWebSiteList = class(TWebSiteList)
protected
WebSites: TWebSiteList;
function GetWebSite(Index: TInteger32): TWebSite; override;
public
Lock: TThreadLock;
constructor Create(WebSites: TWebSiteList); reintroduce; virtual;
destructor Destroy(); override;
procedure Add(WebSite: TWebSite); override;
procedure Remove(WebSite: TWebSite); override;
function Count(): TInteger32; override;
function FindWithName(Name: TText): TWebSite; override;
function CreateIterator(): TIterator<TWebSite>; override;
end;
implementation
uses
Text.Collation;
{ TWebSiteList }
function TWebSiteList.BinarySearch(Name: TText): TInteger32;
var
Low: TInteger32;
Middle: TInteger32;
High: TInteger32;
begin
Low := 0;
High := Count;
while Low < High do
begin
Middle := (Low + High) div 2;
if TTextCollation.DefaultCaseInsensitive.GreaterThan(Name, GetWebSite(Middle).Name) then
Low := Middle + 1
else
High := Middle;
end;
Result := Low;
end;
function TWebSiteList.Count(): TInteger32;
begin
Result := WebSites.Count;
end;
constructor TWebSiteList.Create();
begin
inherited Create();
WebSites := TObjectList<TWebSite>.Create();
end;
destructor TWebSiteList.Destroy();
begin
WebSites.Free();
inherited Destroy();
end;
function TWebSiteList.FindWithName(Name: TText): TWebSite;
var
Index: TInteger32;
begin
Index := BinarySearch(Name);
if (Index < Count) and TTextCollation.DefaultCaseInsensitive.Equal(Name, GetWebSite(Index).Name) then
Result := WebSites[Index]
else
Result := nil;
end;
function TWebSiteList.GetWebSite(Index: TInteger32): TWebSite;
begin
Result := WebSites[Index];
end;
procedure TWebSiteList.Add(WebSite: TWebSite);
begin
WebSites.AddAt(BinarySearch(WebSite.Name), WebSite);
end;
function TWebSiteList.CreateIterator(): TIterator<TWebSite>;
begin
Result := TDefaultWebSiteListIterator.Create(Self);
end;
procedure TWebSiteList.Remove(WebSite: TWebSite);
begin
WebSites.Remove(WebSite);
end;
{ TSynchronizedWebSiteList }
function TSynchronizedWebSiteList.Count(): TInteger32;
begin
Lock.Acquire();
try
Result := WebSites.Count;
finally
Lock.Release();
end;
end;
constructor TSynchronizedWebSiteList.Create(WebSites: TWebSiteList);
begin
inherited Create();
Self.WebSites := WebSites;
Self.Lock := TThreadLock.Create();
end;
destructor TSynchronizedWebSiteList.Destroy();
begin
WebSites.Free();
Lock.Free();
inherited Destroy();
end;
function TSynchronizedWebSiteList.FindWithName(Name: TText): TWebSite;
begin
Lock.Acquire();
try
Result := WebSites.FindWithName(Name);
finally
Lock.Release();
end;
end;
function TSynchronizedWebSiteList.GetWebSite(Index: TInteger32): TWebSite;
begin
Lock.Acquire();
try
Result := WebSites[Index];
finally
Lock.Release();
end;
end;
procedure TSynchronizedWebSiteList.Add(WebSite: TWebSite);
begin
Lock.Acquire();
try
WebSites.Add(WebSite);
finally
Lock.Release();
end;
end;
function TSynchronizedWebSiteList.CreateIterator(): TIterator<TWebSite>;
begin
Result := TSynchronizedWebSiteListIterator.Create(WebSites, Lock);
end;
procedure TSynchronizedWebSiteList.Remove(WebSite: TWebSite);
begin
Lock.Acquire();
try
WebSites.Remove(WebSite);
finally
Lock.Release();
end;
end;
{ TWebSiteListIterator }
{ TDefaultWebSiteListIterator }
constructor TDefaultWebSiteListIterator.Create(WebSites: TWebSiteList);
begin
inherited Create();
Self.WebSites := WebSites;
end;
function TDefaultWebSiteListIterator.GetCurrent(): TWebSite;
begin
Result := WebSites[i];
end;
procedure TDefaultWebSiteListIterator.GotoNext();
begin
Inc(i);
end;
function TDefaultWebSiteListIterator.IsValid(): TBoolean;
begin
Result := i < WebSites.Count;
end;
{ TSynchronizedWebSiteListIterator }
constructor TSynchronizedWebSiteListIterator.Create(WebSites: TWebSiteList; Lock: TThreadLock);
begin
inherited Create();
Self.WebSites := WebSites;
Self.Lock := Lock;
Lock.Acquire();
end;
function TSynchronizedWebSiteListIterator.GetCurrent(): TWebSite;
begin
Result := WebSites[i];
end;
destructor TSynchronizedWebSiteListIterator.Destroy();
begin
Lock.Release();
inherited Destroy();
end;
procedure TSynchronizedWebSiteListIterator.GotoNext();
begin
Inc(i);
end;
function TSynchronizedWebSiteListIterator.IsValid(): TBoolean;
begin
Result := i < WebSites.Count;
end;
end.
|