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
|
/*
SQLite3Expression.m
Copyright (C) 2006 Free Software Foundation, Inc.
Author: Matt Rice <ratmice@gmail.com>
Date: 2006
This file is part of the GNUstep Database Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef GNUSTEP
#include <GNUstepBase/Additions.h>
#endif
#include "SQLite3Expression.h"
#include <EOAccess/EOEntity.h>
#include <EOAccess/EOAttribute.h>
#include <EOAccess/EOSchemaGeneration.h>
#include <EOControl/EONull.h>
#include <Foundation/NSData.h>
@implementation SQLite3Expression
static NSString *escapeValue(id value)
{
NSMutableString *string = [NSMutableString stringWithFormat: @"%@", value];
unsigned length = [string length];
unsigned dif, i;
if (length)
{
unichar tempString[length];
[string getCharacters:tempString];
for (i = 0, dif = 0; i < length; i++)
{
switch (tempString[i])
{
case '\'':
[string insertString: @"'" atIndex: dif + i];
dif++;
break;
default:
break;
}
}
}
return string;
}
+ (NSString *)formatValue: (id)value
forAttribute: (EOAttribute *)attribute
{
NSString *externalType = [attribute externalType];
if (!value)
{
return @"NULL";
}
else if ([value isEqual: [EONull null]])
{
return [value sqlString];
}
else if ([externalType isEqual:@"TEXT"])
{
return [NSString stringWithFormat:@"'%@'", escapeValue(value)];
}
else if ([externalType isEqual:@"BLOB"])
{
return [NSString stringWithFormat:@"X'%@'", [(NSData *)value hexadecimalRepresentation]];
}
else
{
return [NSString stringWithFormat:@"'%@'", escapeValue(value)];
}
}
- (NSString *)lockClause
{
return @""; // does not support locking..
}
- (NSString *)assembleSelectStatementWithAttributes: (NSArray *)attributes
lock: (BOOL)lock
qualifier: (EOQualifier *)qualifier
fetchOrder: (NSArray *)fetchOrder
selectString: (NSString *)selectString
columnList: (NSString *)columnList
tableList: (NSString *)tableList
whereClause: (NSString *)whereClause
joinClause: (NSString *)joinClause
orderByClause: (NSString *)orderByClause
lockClause: (NSString *)lockClause
{
NSMutableString *sqlString;
sqlString = [NSMutableString stringWithFormat: @"%@ %@ FROM %@",
selectString,
columnList,
tableList];
if (whereClause && joinClause)
{
[sqlString appendFormat: @" WHERE (%@) AND (%@)",
whereClause,
joinClause];
}
else if (whereClause || joinClause)
{
[sqlString appendFormat: @" WHERE %@",
(whereClause ? whereClause : joinClause)];
}
if (orderByClause)
[sqlString appendFormat: @" ORDER BY %@", orderByClause];
return sqlString;
}
- (NSString *)columnTypeStringForAttribute:(EOAttribute *)attribute
{
NSString *typeString = [super columnTypeStringForAttribute:attribute];
if ([[[attribute entity] primaryKeyAttributes] containsObject:attribute])
{
return [NSString stringWithFormat:@"%@ %@", typeString, @"PRIMARY KEY"];
}
return typeString;
}
+ (NSArray *)primaryKeySupportStatementsForEntityGroup: (NSArray *)entityGroup
{
return [NSArray array];
}
+ (NSArray *)dropPrimaryKeySupportStatementsForEntityGroup: (NSArray *)entityGroup
{
return [NSArray array];
}
+ (NSArray *)createDatabaseStatementsForConnectionDictionary: (NSDictionary *)connDict
administrativeConnectionDictionary: (NSDictionary *)admConnDict
{
return [NSArray array];
}
+ (NSArray *)dropDatabaseStatementsForConnectionDictionary: (NSDictionary *)connDict
administrativeConnectionDictionary: (NSDictionary *)admConnDict
{
return [NSArray array];
}
// TODO find a better way to do this?
+ (NSArray *)primaryKeyConstraintStatementsForEntityGroup:(NSArray *)entityGroup
{
NSString *keyTable;
keyTable = @"CREATE TABLE IF NOT EXISTS 'SQLiteEOAdaptorKeySequences' (" \
@"seq_key INTEGER PRIMARY KEY AUTOINCREMENT, " \
@"tableName TEXT, " \
@"attributeName TEXT, " \
@"key INTEGER" \
@")";
return [NSArray arrayWithObject:[self expressionForString:keyTable]];
}
+ (NSArray *)dropPrimaryKeyConstraintStatementsForEntityGroup:(NSArray *)entityGroup
{
return [NSArray arrayWithObject:[self expressionForString:@"DROP TABLE 'SQLiteEOAdaptorKeySequences'"]];
}
+ (NSArray *)foreignKeyConstraintStatementsForRelationship: (EORelationship *)relationship
{
/* SQLite3 doesn't currently handle ADD CONSTRAINT from ALTER TABLE. */
return [NSArray array];
}
@end
|
