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