blob: 7ef9bfff5f1db0cc7287254c6b6b2727112bff9e (
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
|
/*
* Copyright 2017 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "FValueIndex.h"
#import "FNamedNode.h"
#import "FSnapshotUtilities.h"
#import "FUtilities.h"
#import "FMaxNode.h"
@implementation FValueIndex
- (NSComparisonResult) compareKey:(NSString *)key1
andNode:(id<FNode>)node1
toOtherKey:(NSString *)key2
andNode:(id<FNode>)node2
{
NSComparisonResult indexCmp = [node1 compare:node2];
if (indexCmp == NSOrderedSame) {
return [FUtilities compareKey:key1 toKey:key2];
} else {
return indexCmp;
}
}
- (NSComparisonResult) compareKey:(NSString *)key1
andNode:(id<FNode>)node1
toOtherKey:(NSString *)key2
andNode:(id<FNode>)node2
reverse:(BOOL)reverse
{
if (reverse) {
return [self compareKey:key2 andNode:node2 toOtherKey:key1 andNode:node1];
} else {
return [self compareKey:key1 andNode:node1 toOtherKey:key2 andNode:node2];
}
}
- (NSComparisonResult) compareNamedNode:(FNamedNode *)namedNode1 toNamedNode:(FNamedNode *)namedNode2
{
return [self compareKey:namedNode1.name andNode:namedNode1.node toOtherKey:namedNode2.name andNode:namedNode2.node];
}
- (BOOL)isDefinedOn:(id<FNode>)node {
return YES;
}
- (BOOL)indexedValueChangedBetween:(id<FNode>)oldNode and:(id<FNode>)newNode {
return ![oldNode isEqual:newNode];
}
- (FNamedNode *)minPost {
return FNamedNode.min;
}
- (FNamedNode *)maxPost {
return FNamedNode.max;
}
- (FNamedNode *)makePost:(id<FNode>)indexValue name:(NSString*)name {
return [[FNamedNode alloc] initWithName:name andNode:indexValue];
}
- (NSString *)queryDefinition {
return @".value";
}
- (NSString *) description {
return @"FValueIndex";
}
- (id)copyWithZone:(NSZone *)zone {
return self;
}
- (BOOL) isEqual:(id)other {
// since we're a singleton.
return (other == self);
}
- (NSUInteger) hash {
return [@".value" hash];
}
+ (id<FIndex>) valueIndex {
static id<FIndex> valueIndex;
static dispatch_once_t once;
dispatch_once(&once, ^{
valueIndex = [[FValueIndex alloc] init];
});
return valueIndex;
}
@end
|