RMTileCache.m
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//
// TileCache.m
// RouteMe
//
// Created by Joseph Gentle on 2/09/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import "RMTileCache.h"
#import "RMMemoryCache.h"
#import "RMDiskCache.h"
#import "RMDatabaseCache.h"
#import "RMConfiguration.h"
static RMTileCache *cache = nil;
@implementation RMTileCache
-(id)init
{
if (![super init])
return nil;
caches = [[NSMutableArray alloc] init];
id cacheCfg = [[RMConfiguration configuration] cacheConfiguration];
if (cacheCfg==nil)
{
cacheCfg = [NSArray arrayWithObjects:
[NSDictionary dictionaryWithObject: @"memory-cache" forKey: @"type"],
[NSDictionary dictionaryWithObject: @"disk-cache" forKey: @"type"],
[NSDictionary dictionaryWithObject: @"db-cache" forKey: @"type"],
nil
];
}
for (id cfg in cacheCfg)
{
RMTileCache* newCache = nil;
@try {
NSString* type = [cfg valueForKey:@"type"];
if ([@"memory-cache" isEqualToString: type])
{
NSNumber* capacity = [cfg objectForKey:@"capacity"];
if (capacity == nil) capacity = [NSNumber numberWithInt: 32];
newCache = [[RMMemoryCache alloc] initWithCapacity: [capacity intValue]];
}
if ([@"disk-cache" isEqualToString: type])
{
NSLog(@"creating disk cache");
newCache = [[RMDiskCache alloc] init];
}
if ([@"db-cache" isEqualToString: type])
{
newCache = [[RMDatabaseCache alloc] init];
}
if (newCache)
{
[caches addObject: newCache];
[newCache release];
}
else
{
NSLog(@"failed to create cache of type %@", type);
}
}
@catch (NSException * e) {
NSLog(@"*** configuration error: %@", [e reason]);
}
}
return self;
}
-(void) dealloc
{
[caches release];
[super dealloc];
}
+(RMTileCache*)sharedCache
{
if (cache == nil)
{
cache = [[RMTileCache alloc] init];
}
return cache;
}
-(void)addCache: (id<RMTileCache>)cache
{
[caches addObject:cache];
}
+(NSNumber*) tileHash: (RMTile)tile
{
return [NSNumber numberWithUnsignedLongLong: RMTileHash(tile)];
}
// Returns the cached image if it exists. nil otherwise.
-(RMTileImage*) cachedImage:(RMTile)tile
{
for (id<RMTileCache> cache in caches)
{
RMTileImage *image = [cache cachedImage:tile];
if (image != nil)
return image;
}
return nil;
}
-(void)addTile: (RMTile)tile WithImage: (RMTileImage*)image
{
for (id<RMTileCache> cache in caches)
{
if ([cache respondsToSelector:@selector(addTile:WithImage:)])
{
[cache addTile:tile WithImage:image];
}
}
}
@end