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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;
@protocol FOperation;
@protocol FEventRegistration;
@class FWriteTreeRef;
@class FQuerySpec;
@class FChange;
@class FPath;
@class FViewCache;
@interface FViewOperationResult : NSObject
@property (nonatomic, strong, readonly) NSArray* changes;
@property (nonatomic, strong, readonly) NSArray* events;
@end
@interface FView : NSObject
@property (nonatomic, strong, readonly) FQuerySpec *query;
- (id) initWithQuery:(FQuerySpec *)query initialViewCache:(FViewCache *)initialViewCache;
- (id<FNode>) eventCache;
- (id<FNode>) serverCache;
- (id<FNode>) completeServerCacheFor:(FPath*)path;
- (BOOL) isEmpty;
- (void) addEventRegistration:(id<FEventRegistration>)eventRegistration;
- (NSArray *) removeEventRegistration:(id<FEventRegistration>)eventRegistration cancelError:(NSError *)cancelError;
- (FViewOperationResult *) applyOperation:(id <FOperation>)operation writesCache:(FWriteTreeRef *)writesCache serverCache:(id <FNode>)optCompleteServerCache;
- (NSArray *) initialEvents:(id<FEventRegistration>)registration;
@end
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