-
Notifications
You must be signed in to change notification settings - Fork 0
/
rdb-attr.cpp
505 lines (442 loc) · 16.8 KB
/
rdb-attr.cpp
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
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
//This file contains the implementation of attributes and its derived types, record and relation
/**********************************************************************************************/
#include"rdb.h"
#include<iostream>
using namespace std;
stringAttribute::stringAttribute(string p)//constructor for string attribute
{
s = p;
}
bool stringAttribute:: operator==(Attr &right)// == operator overloaded for string attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s == ((stringAttribute *)(&right))->s);
}
bool stringAttribute::operator!=(Attr &right)// != operator overloaded for string attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 1;
return (s != ((stringAttribute *)(&right))->s);
}
bool stringAttribute:: operator<=(Attr &right)// <= operator overloaded for string attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s <= ((stringAttribute *)(&right))->s);
}
bool stringAttribute::operator>=(Attr &right)// >= operator overloaded for string attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s >= ((stringAttribute *)(&right))->s);
}
bool stringAttribute::operator<(Attr &right)// < operator overloaded for string attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s < ((stringAttribute *)(&right))->s);
}
bool stringAttribute::operator>(Attr &right)// > operator overloaded for string attribute
{
if (this->type() != (&right)->type())
return 0;
return (s > ((stringAttribute *)(&right))->s);
}
int stringAttribute::type() { return 0; }//returns the type of attribute
string stringAttribute::get() { return s; }//returns the value of string attribute
integerAttribute:: integerAttribute(int i)//constructor for integer attribute
{
s = i;
}
bool integerAttribute::operator==(Attr &right)// == operator overloaded for integer attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s == ((integerAttribute *)(&right))->s);
}
bool integerAttribute::operator!=(Attr &right)// != operator overloaded for integer attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 1;
return (s != ((integerAttribute *)(&right))->s);
}
bool integerAttribute::operator<=(Attr &right)// <= operator overloaded for integer attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s <= ((integerAttribute *)(&right))->s);
}
bool integerAttribute::operator>=(Attr &right)// >= operator overloaded for integer attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s >= ((integerAttribute *)(&right))->s);
}
bool integerAttribute::operator<(Attr &right)// < operator overloaded for integer attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s < ((integerAttribute *)(&right))->s);
}
bool integerAttribute::operator>(Attr &right)// > operator overloaded for integer attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s > ((integerAttribute *)(&right))->s);
}
int integerAttribute::type() { return 1; }//returns the type of attribute
int integerAttribute::get() { return s; }// returns the value of integer attribute
floatAttribute::floatAttribute(float i)//constructor for float attribute
{
s = i;
}
bool floatAttribute::operator==(Attr &right)// == operator overloaded for float attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s == ((floatAttribute *)(&right))->s);
}
bool floatAttribute::operator!=(Attr &right)// != operator overloaded for float attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 1;
return (s != ((floatAttribute *)(&right))->s);
}
bool floatAttribute::operator<=(Attr &right)// <= operator overloaded for float attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s <= ((floatAttribute *)(&right))->s);
}
bool floatAttribute::operator>=(Attr &right)// >= operator overloaded for float attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s >= ((floatAttribute *)(&right))->s);
}
bool floatAttribute::operator<(Attr &right)// < operator overloaded for float attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s < ((floatAttribute *)(&right))->s);
}
bool floatAttribute::operator>(Attr &right)// > operator overloaded for float attribute
{
if (this->type() != (&right)->type())
return 0;
return (s > ((floatAttribute *)(&right))->s);
}
int floatAttribute::type() { return 2; }//returns the type of attribute
float floatAttribute::get() { return s; }//returns the value of float attribute
doubleAttribute::doubleAttribute(double i )//constructor for double attribute
{
s = i;
}
bool doubleAttribute::operator==(Attr &right)// == operator overloaded for double attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s == ((doubleAttribute *)(&right))->s);
}
bool doubleAttribute::operator!=(Attr &right)// != operator overloaded for double attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 1;
return (s != ((doubleAttribute *)(&right))->s);
}
bool doubleAttribute::operator<=(Attr &right)// <= operator overloaded for double attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s <= ((doubleAttribute *)(&right))->s);
}
bool doubleAttribute::operator>=(Attr &right)// >= operator overloaded for double attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s >= ((doubleAttribute *)(&right))->s);
}
bool doubleAttribute::operator<(Attr &right)// < operator overloaded for double attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s < ((doubleAttribute *)(&right))->s);
}
bool doubleAttribute::operator>(Attr &right)// > operator overloaded for double attribute
{
if (this->type() != (&right)->type())//checks if the types of the attribute is same
return 0;
return (s > ((doubleAttribute *)(&right))->s);
}
int doubleAttribute::type() { return 3; }//returns the type of attribute
double doubleAttribute::get() { return s; }//returns the value of double attribute
//record
Record::Record()//constructor for record
{
}
Record::Record(Record &R)//copy constructor for record
{
for (auto i = R.getptr().begin(); i < R.getptr().end(); i++)
{
int type = (*i)->type();//getting type of attribute
switch (type)
{
case 0://string attribute case
get(((stringAttribute *)((*i)))->get());
break;
case 1://integer attribute case
get(((integerAttribute *)((*i)))->get());
break;
case 2://float attribute case
get(((floatAttribute *)((*i)))->get());
break;
case 3://double attribute case
get(((doubleAttribute *)((*i)))->get());
break;
}
}
}
Record::~Record()//destrucutor for record
{
for (int i = 0; i < attrptr.size(); i++)
{
delete attrptr[i];//deleting the memory allocated for attributes
}
}
Record Record::operator+=(Record &R)// += operator overloaded for record
{
for (auto i = R.getptr().begin(); i < R.getptr().end(); i++)
{
int type = (*i)->type();
switch (type)
{
case 0:
this->get(((stringAttribute *)((*i)))->get());
break;
case 1:
this->get(((integerAttribute *)((*i)))->get());
break;
case 2:
this->get(((floatAttribute *)((*i)))->get());
break;
case 3:
this->get(((doubleAttribute *)((*i)))->get());
break;
}
}
}
bool Record::operator==(Record *R2)// == operator overloaded for record
{
int i;
auto it = getptr().begin();
auto it1 = R2->getptr().begin();
if(getptr().size()!=R2->getptr().size())
return 0;
for (it = getptr().begin(); it != getptr().end(); it++, it1++)
{
int flag = 0;
//checking if the types of attributes are same
int type = (*it)->type();
int type1 = (*it1)->type();
if(type!=type1)
return 0;
switch (type)
{
case 0://both string attributes case
if (((stringAttribute *)(*it1))->get() != ((stringAttribute *)(*it))->get())
{
flag = 1;
break;
}
break;
case 1: // both are integer attributes case
if (((integerAttribute *)(*it1))->get() != ((integerAttribute *)(*it))->get())
{
flag = 1;
break;
}
break;
case 2://both are float attributes case
if (((floatAttribute *)(*it1))->get() != ((floatAttribute *)(*it))->get())
{
flag = 1;
break;
}
break;
case 3:// both are double attributes case
if (((doubleAttribute *)(*it1))->get() != ((doubleAttribute *)(*it))->get())
{
flag = 1;
break;
}
break;
}
if (flag)
break;
}
if (it == getptr().end())
return 1;
else
return 0;
}
vector<Attr *>& Record::getptr()//meathod to return the vector of attributes
{
return (attrptr);
}
void Record::get(string s)//meathod to add a string attribute to record
{
attrptr.push_back(new stringAttribute(s));
}
void Record::get(int i)//meadthod to add a integer attribute to record
{
attrptr.push_back(new integerAttribute(i));
}
void Record::get(float i)//meathod to add a float attribute to record
{
attrptr.push_back(new floatAttribute(i));
}
void Record::get(double i)//meadhod to addd a double attribute to record
{
attrptr.push_back(new doubleAttribute(i));
}
void Record::print()//function to print the record
{
for (auto it = attrptr.begin(); it != attrptr.end(); it++)
{
int type = (*it)->type();//chceking the type of attribute
switch (type)
{
case 0://string case
cout << ((stringAttribute *)(*it))->get() << " ";
break;
case 1://integer case
cout << ((integerAttribute *)(*it))->get() << " ";
break;
case 2://float case
cout << ((floatAttribute *)(*it))->get() << " ";
break;
case 3://double case
cout << ((doubleAttribute *)(*it))->get() << " ";
}
}
cout << "\n";
}
//Relation
Relation::~Relation()//desstrcutor for relation
{
for (auto it = recs.begin(); it != recs.end(); it++)
{
delete (*it);
}
}
void Relation::get()//function to instatiate the relation
{
string s;
int intinput;
float floatinput;
double doubleinput;
cout << "enter the number of attriutes\n";//getting the number of attributes
cin >> nattr;
int type[nattr];
cout << "enter the number of records\n";
cin >> nrecs;//getting the number of records
cout << "enter attributes names \n ";
for (int i = 0; i < nattr; i++)//getting attribute names
{
cin >> s;
attrnames.push_back(s);
}
cout << "types: string->0,int->1,float->2,double->3\n";
for (int j = 0; j < nattr; j++)// getting attribute types
{
cout << "enter type for " << attrnames[j] << endl;
cin >> type[j];
}
for (int i = 0; i < nrecs; i++)//adding record to the realtion
{
Record *a = new Record;
cout << "Record: " << i << endl;
for (int j = 0; j < nattr; j++)
{
switch (type[j])
{
case 0://case for string attribute
cout << "enter a string for the attribute " << attrnames[j] << " : ";
cin >> s;
a->get(s);
break;
case 1:// case for integer attribute
cout << "enter a integer for the attribute " << attrnames[j] << " : ";
cin >> intinput;
a->get(intinput);
break;
case 2://case for float attribute
cout << "enter a floating number for the attribute " << attrnames[j] << " : ";
cin >> floatinput;
a->get(floatinput);
break;
case 3://case for double attribute
cout << "enter a double number for the attribute " << attrnames[j] << " : ";
cin >> doubleinput;
a->get(doubleinput);
break;
default://invalid type case;
cout << "invalid type\n";
j--;
}
}
recs.push_back(a);
}
}
void Relation::print()//fucntion to print the relation
{
for (int i = 0; i < nattr; i++)//first printing the attribute names
{
cout << attrnames[i] << " ";
}
cout << "\n";
for (auto it = recs.begin(); it != recs.end(); it++)//priting records wise
{
(*it)->print();// calling the print function of record class
}
}
void Relation::addrecord()//fucntion to add record to the relation
{
int i1;
string s;
float f;
double d;
Record *a = new Record;
for (int i = 0; i < nattr; i++)//taking input for each attribute
{
int type = (*(recs.begin()))->getptr()[i]->type();
switch (type)
{
case 0://case of string attribute
cout << "enter a string for the atribute " << attrnames[i] << " : " << endl;
cin >> s;
a->get(s);
break;
case 1://case of integer attribute
cout << "enter a integer for the atribute " << attrnames[i] << " : " << endl;
cin >> i1;
a->get(i1);
break;
case 2://case of float attribute
cout << "enter a float for the atribute " << attrnames[i] << " : " << endl;
cin >> f;
a->get(f);
break;
case 3:// case of double attribute
cout << "enter a double for the atribute " << attrnames[i] << " : " << endl;
cin >> d;
a->get(d);
break;
}
}
}
int Relation::getnrecs()
{
return recs.size();
}