forked from danielctull/DCTCoreData
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathNSManagedObjectContext+DCTDataFetching.m
153 lines (112 loc) · 5.14 KB
/
NSManagedObjectContext+DCTDataFetching.m
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
/*
NSManagedObjectContext+DCTDataFetching.m
DCTCoreData
Created by Daniel Tull on 16.09.2009.
Copyright (C) 2010 Daniel Tull. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its contributors may be used
to endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "NSManagedObjectContext+DCTDataFetching.h"
#import "NSFetchRequest+DCTExtras.h"
@implementation NSManagedObjectContext (DCTDataFetching)
#pragma mark -
#pragma mark Fetching Multiple Objects
- (NSArray *)dct_fetchObjectsForEntityName:(NSString *)entityName {
return [self dct_fetchObjectsForEntityName:entityName
predicate:nil
sortDescriptors:nil
batchSize:DCTFetchBatchSizeNil];
}
- (NSArray *)dct_fetchObjectsForEntityName:(NSString *)entityName
predicate:(NSPredicate *)predicate {
return [self dct_fetchObjectsForEntityName:entityName
predicate:predicate
sortDescriptors:nil
batchSize:DCTFetchBatchSizeNil];
}
- (NSArray *)dct_fetchObjectsForEntityName:(NSString *)entityName
predicate:(NSPredicate *)predicate
sortDescriptors:(NSArray *)sortDescriptors {
return [self dct_fetchObjectsForEntityName:entityName
predicate:predicate
sortDescriptors:sortDescriptors
batchSize:DCTFetchBatchSizeNil];
}
- (NSArray *)dct_fetchObjectsForEntityName:(NSString *)entityName
sortDescriptors:(NSArray *)sortDescriptors {
return [self dct_fetchObjectsForEntityName:entityName
predicate:nil
sortDescriptors:sortDescriptors
batchSize:DCTFetchBatchSizeNil];
}
// The one method that does the heavy lifting:
- (NSArray *)dct_fetchObjectsForEntityName:(NSString *)entityName
predicate:(NSPredicate *)predicate
sortDescriptors:(NSArray *)sortDescriptors
batchSize:(NSUInteger)batchSize {
NSEntityDescription *entity = [NSEntityDescription entityForName:entityName inManagedObjectContext:self];
NSFetchRequest *request = [[NSFetchRequest alloc] dct_initWithEntity:entity
predicate:predicate
sortDescriptors:sortDescriptors
batchSize:batchSize];
NSError *error = nil;
NSArray *fetchResult = [self executeFetchRequest:request error:&error];
if (error) {
NSLog(@"DCTDataFetching: Error fetching objects. %@", error);
return nil;
}
return fetchResult;
}
#pragma mark -
#pragma mark Fetching Single Objects
- (id)dct_fetchAnyObjectForEntityName:(NSString *)entityName {
return [self dct_fetchFirstObjectForEntityName:entityName
predicate:nil
sortDescriptors:nil];
}
- (id)dct_fetchAnyObjectForEntityName:(NSString *)entityName
predicate:(NSPredicate *)predicate {
return [self dct_fetchFirstObjectForEntityName:entityName
predicate:predicate
sortDescriptors:nil];
}
- (id)dct_fetchFirstObjectForEntityName:(NSString *)entityName
sortDescriptors:(NSArray *)sortDescriptors {
return [self dct_fetchFirstObjectForEntityName:entityName
predicate:nil
sortDescriptors:sortDescriptors];
}
- (id)dct_fetchFirstObjectForEntityName:(NSString *)entityName
predicate:(NSPredicate *)predicate
sortDescriptors:(NSArray *)sortDescriptors {
NSArray *results = [self dct_fetchObjectsForEntityName:entityName
predicate:predicate
sortDescriptors:sortDescriptors
batchSize:DCTFetchBatchSizeNil];
if ([results count] < 1) return nil;
return [results objectAtIndex:0];
}
#pragma mark -
#pragma mark Inserting New Objects
- (id)dct_insertNewObjectForEntityName:(NSString *)entityName {
return [NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:self];
}
@end