//
//  CBLQueryChange.h
//  CouchbaseLite
//
//  Copyright (c) 2017 Couchbase, Inc All rights reserved.
//
//  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>
@class CBLQuery;
@class CBLQueryResultSet;

NS_ASSUME_NONNULL_BEGIN

/** 
 CBLQueryChange contains the information about the query result changes reported
 by a live query object.
 */
@interface CBLQueryChange : NSObject

/** The source live query object. */
@property (nonatomic, readonly) CBLQuery* query;

/** The new query result. */
@property (nonatomic, readonly, nullable) CBLQueryResultSet* results;

/** The error occurred when running the query. */
@property (nonatomic, readonly, nullable) NSError* error;

/** Not available */
- (instancetype) init NS_UNAVAILABLE;

@end

NS_ASSUME_NONNULL_END