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/*
* 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 <Foundation/Foundation.h>
@protocol FNode;
@class FPruneForest;
@class FPath;
@class FCompoundWrite;
@class FQuerySpec;
@class FTrackedQuery;
@protocol FStorageEngine <NSObject>
- (void)close;
- (void)saveUserOverwrite:(id<FNode>)node atPath:(FPath *)path writeId:(NSUInteger)writeId;
- (void)saveUserMerge:(FCompoundWrite *)merge atPath:(FPath *)path writeId:(NSUInteger)writeId;
- (void)removeUserWrite:(NSUInteger)writeId;
- (void)removeAllUserWrites;
- (NSArray *)userWrites;
- (id<FNode>)serverCacheAtPath:(FPath *)path;
- (id<FNode>)serverCacheForKeys:(NSSet *)keys atPath:(FPath *)path;
- (void)updateServerCache:(id<FNode>)node atPath:(FPath *)path merge:(BOOL)merge;
- (void)updateServerCacheWithMerge:(FCompoundWrite *)merge atPath:(FPath *)path;
- (NSUInteger)serverCacheEstimatedSizeInBytes;
- (void)pruneCache:(FPruneForest *)pruneForest atPath:(FPath *)path;
- (NSArray *)loadTrackedQueries;
- (void)removeTrackedQuery:(NSUInteger)queryId;
- (void)saveTrackedQuery:(FTrackedQuery *)query;
- (void)setTrackedQueryKeys:(NSSet *)keys forQueryId:(NSUInteger)queryId;
- (void)updateTrackedQueryKeysWithAddedKeys:(NSSet *)added removedKeys:(NSSet *)removed forQueryId:(NSUInteger)queryId;
- (NSSet *)trackedQueryKeysForQuery:(NSUInteger)queryId;
@end
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