blob: c5dc637feffd31759c8f43f090f8810f0a75647c (
plain)
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
|
/**********************************************************************
** Copyright (C) 2000 Trolltech AS. All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
/*
* This file is used to load the xml files that represent the database.
* The main requirment for said file is each data entry must contain a key,
* otherwise any other data headings are allowed.
*/
#ifndef __DATACACHE_H__
#define __DATACACHE_H__
#include <qstring.h>
#include <qvector.h>
#include "common.h"
class DBStore;
/*! Abstract class that defines how database stuff can be accessed */
class DBAccess {
public:
// DBAccess(DBStore *d) { dstore = d; }
virtual ~DBAccess() {}
virtual QString type() {
return QString();
}
virtual bool openSource(QIODevice *) {
qWarning("DBAccess::openSource not yet implemented");
return false;
}
virtual bool saveSource(QIODevice *) {
qWarning("DBAccess::saveSource(QString) not yet implemented");
return false;
}
protected:
DBStore *dstore;
QString source_name;
};
class DBStore {
public:
DBStore();
~DBStore();
bool openSource(QIODevice *, const QString &source);
bool saveSource(QIODevice *, const QString &source);
// Add an item
void addItem(DataElem *);
void addItemInternal(DataElem *);
void removeItem(DataElem *);
// Set the name of the database
void setName(const QString &name);
// Get the name of the database
QString getName();
KeyList *getKeys();
void setKeys(KeyList *);
/*! gets the number of fields defined in the database */
inline int getNumFields() {
return kRep->getNumFields();
}
/*! gets the index of a key given its name */
inline int getKeyIndex(QString qs) {
return kRep->getKeyIndex(qs);
}
/*! gets the type of a key given its index */
inline TVVariant::KeyType getKeyType(int i) {
return kRep->getKeyType(i);
}
/*! gets the name of a key given its index */
inline QString getKeyName(int i) {
return kRep->getKeyName(i);
}
// Access functions.. iterator type stuff
void first();
void last();
bool next();
bool previous();
DataElem* getCurrentData();
private:
/* does the work of freeing used memory */
void freeTable();
QString name;
QVector<DataElem> master_table;
DBAccess *archive;
KeyList *kRep;
unsigned int number_elems;
unsigned int table_size; /* should always be a power of 2 */
bool full; /* since because we are using an int for indexing there is
an upper limit on the number of items we can store. */
unsigned int current_elem;
};
#endif
|
