caches are configurable by embedding application

+//
+//  RMConfiguration.h
+//  MapView
+//
+//  Created by Hauke Brandes on 28.10.08.
+//  Copyright 2008 __MyCompanyName__. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+
+@interface RMConfiguration : NSObject {
+
+	id propList;
+	
+}
+
++ (RMConfiguration*) configuration;
+
+- (RMConfiguration*) initWithPath: (NSString*) path;
+- (void) dealloc;
+
+- (NSDictionary*) cacheConfiguration;
+
+@end

+//
+//  RMConfiguration.m
+//  MapView
+//
+//  Created by Hauke Brandes on 28.10.08.
+//  Copyright 2008 __MyCompanyName__. All rights reserved.
+//
+
+#import "RMConfiguration.h"
+
+static RMConfiguration* RMConfigurationSharedInstance = nil;
+
+@implementation RMConfiguration
+
++ (RMConfiguration*) configuration
+{
+	
+	@synchronized (RMConfigurationSharedInstance) {
+		if (RMConfigurationSharedInstance != nil) return RMConfigurationSharedInstance;
+	
+		RMConfigurationSharedInstance = [[RMConfiguration alloc] 
+										 initWithPath: [[NSBundle mainBundle] pathForResource:@"routeme" ofType:@"plist"]];
+
+		return RMConfigurationSharedInstance;
+	}
+	return nil;
+}
+
+
+- (RMConfiguration*) initWithPath: (NSString*) path
+{
+	self = [super init];
+	
+	if (self==nil) return nil;
+	
+	NSData *plistData;
+	NSString *error;
+	NSPropertyListFormat format;
+
+	if (path==nil) 
+	{
+		propList = nil;
+		return self;
+	}
+	
+	NSLog(@"reading configuration from %@", path);	
+	plistData = [NSData dataWithContentsOfFile:path];
+
+	propList = [[NSPropertyListSerialization 
+					propertyListFromData:plistData
+					mutabilityOption:NSPropertyListImmutable
+					format:&format
+					errorDescription:&error] retain];
+
+	if(!propList)
+	{
+		NSLog(@"problem reading from %@: %@", path, error);
+		[error release];
+	}
+
+	return self;
+}
+	
+
+- (void) dealloc
+{
+	[propList release];
+	[super dealloc];
+}
+
+
+- (NSDictionary*) cacheConfiguration
+{
+	if (propList==nil) return nil;
+	return [propList objectForKey: @"caches"];
+}
+
+@end

@@ -16,6 +16,8 @@
 	if (![super init])
 		return nil;
 
+	NSLog(@"initializing memory cache with capacity %d", _capacity);
+	
 	cache = [[NSMutableDictionary alloc] initWithCapacity:_capacity];
 	
 	if (_capacity < 1)

@@ -12,6 +12,8 @@
 #import "RMDiskCache.h"
 #import "RMDatabaseCache.h"
 
+#import "RMConfiguration.h"
+
 static RMTileCache *cache = nil;
 
 @implementation RMTileCache
@@ -23,18 +25,59 @@ static RMTileCache *cache = nil;
 	
 	caches = [[NSMutableArray alloc] init];
 
-	RMMemoryCache *memoryCache = [[RMMemoryCache alloc] init];
-	RMDiskCache *diskCache = [[RMDiskCache alloc] init];
-	RMDatabaseCache *dbCache = [[RMDatabaseCache 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"];
 			
-	[self addCache:memoryCache];
-	[self addCache:diskCache];
-	[self addCache:dbCache];
+			if ([@"memory-cache" isEqualToString: type]) 
+			{
+				NSNumber* capacity = [cfg objectForKey:@"capacity"];
+				if (capacity == nil) capacity = [NSNumber numberWithInt: 32];
+				newCache = [[RMMemoryCache alloc] initWithCapacity: [capacity intValue]];
+			}
 			
-	[memoryCache release];
-	[diskCache release];
-	[dbCache release];
+			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;
 }
 

@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		126692A10EB75C0A00E002D5 /* RMConfiguration.m in Sources */ = {isa = PBXBuildFile; fileRef = 126692A00EB75C0A00E002D5 /* RMConfiguration.m */; };
+		126693040EB76C0B00E002D5 /* RMConfiguration.m in Sources */ = {isa = PBXBuildFile; fileRef = 126692A00EB75C0A00E002D5 /* RMConfiguration.m */; };
 		1D3623260D0F684500981E51 /* MapViewAppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 1D3623250D0F684500981E51 /* MapViewAppDelegate.m */; };
 		1D60589B0D05DD56006BFB54 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 29B97316FDCFA39411CA2CEA /* main.m */; };
 		1D60589F0D05DD5A006BFB54 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 1D30AB110D05D00D00671497 /* Foundation.framework */; };
@@ -128,6 +130,8 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		1266929F0EB75C0A00E002D5 /* RMConfiguration.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RMConfiguration.h; sourceTree = "<group>"; };
+		126692A00EB75C0A00E002D5 /* RMConfiguration.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RMConfiguration.m; sourceTree = "<group>"; };
 		1D30AB110D05D00D00671497 /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = System/Library/Frameworks/Foundation.framework; sourceTree = SDKROOT; };
 		1D3623240D0F684500981E51 /* MapViewAppDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MapViewAppDelegate.h; sourceTree = "<group>"; };
 		1D3623250D0F684500981E51 /* MapViewAppDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MapViewAppDelegate.m; sourceTree = "<group>"; };
@@ -261,6 +265,15 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		1266929E0EB75BEA00E002D5 /* Configuration */ = {
+			isa = PBXGroup;
+			children = (
+				1266929F0EB75C0A00E002D5 /* RMConfiguration.h */,
+				126692A00EB75C0A00E002D5 /* RMConfiguration.m */,
+			);
+			name = Configuration;
+			sourceTree = "<group>";
+		};
 		19C28FACFE9D520D11CA2CBB /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -506,6 +519,7 @@
 				B83E64CE0E80E73F001663B6 /* Tile Images */,
 				B83E64B80E80E73F001663B6 /* Renderers */,
 				B86F26A80E8742ED007A3773 /* Layers */,
+				1266929E0EB75BEA00E002D5 /* Configuration */,
 				B8474C610EB53A01006A0BC1 /* Resources */,
 			);
 			path = Map;
@@ -681,6 +695,7 @@
 				1D60589B0D05DD56006BFB54 /* main.m in Sources */,
 				1D3623260D0F684500981E51 /* MapViewAppDelegate.m in Sources */,
 				28D7ACF80DDB3853001CB0EB /* MapViewViewController.m in Sources */,
+				126692A10EB75C0A00E002D5 /* RMConfiguration.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -722,6 +737,7 @@
 				B8474BA00EB40094006A0BC1 /* FMResultSet.m in Sources */,
 				B8474BA30EB40094006A0BC1 /* RMTileCacheDAO.m in Sources */,
 				B8474BA50EB40094006A0BC1 /* RMDatabaseCache.m in Sources */,
+				126693040EB76C0B00E002D5 /* RMConfiguration.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};