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61 lines
1.5 KiB
61 lines
1.5 KiB
1 year ago
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//
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// DLFIFOCache.m
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// DLSlideViewDemo
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//
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// Created by Dongle Su on 14-12-13.
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// Copyright (c) 2014年 dongle. All rights reserved.
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//
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#import "DLLRUCache.h"
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@implementation DLLRUCache{
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NSMutableDictionary *dic_;
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NSMutableArray *lruKeyList_;
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NSInteger capacity_;
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}
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- (id)initWithCount:(NSInteger)count{
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if (self = [super init]) {
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capacity_ = count;
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dic_ = [NSMutableDictionary dictionaryWithCapacity:capacity_];
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lruKeyList_ = [NSMutableArray arrayWithCapacity:capacity_];
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}
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return self;
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}
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- (void)setObject:(id)object forKey:(NSString *)key{
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if (![lruKeyList_ containsObject:key]) {
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if (lruKeyList_.count < capacity_) {
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[dic_ setValue:object forKey:key];
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[lruKeyList_ addObject:key];
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}
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else{
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NSString *longTimeUnusedKey = [lruKeyList_ firstObject];
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[dic_ setValue:nil forKey:longTimeUnusedKey];
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[lruKeyList_ removeObjectAtIndex:0];
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[dic_ setValue:object forKey:key];
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[lruKeyList_ addObject:key];
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}
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}
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else{
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[dic_ setValue:object forKey:key];
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[lruKeyList_ removeObject:key];
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[lruKeyList_ addObject:key];
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}
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}
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- (id)objectForKey:(NSString *)key{
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if ([lruKeyList_ containsObject:key]) {
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[lruKeyList_ removeObject:key];
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[lruKeyList_ addObject:key];
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return [dic_ objectForKey:key];
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}
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else{
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return nil;
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}
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}
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@end
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