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-rw-r--r--Firebase/Database/Core/View/FChange.h38
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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>
+#import "FIRDatabaseReference.h"
+#import "FNode.h"
+#import "FIndexedNode.h"
+
+@interface FChange : NSObject
+
+@property (nonatomic, readonly) FIRDataEventType type;
+@property (nonatomic, strong, readonly) FIndexedNode *indexedNode;
+@property (nonatomic, strong, readonly) NSString *childKey;
+@property (nonatomic, strong, readonly) NSString *prevKey;
+@property (nonatomic, strong, readonly) FIndexedNode *oldIndexedNode;
+
+- (id)initWithType:(FIRDataEventType)type indexedNode:(FIndexedNode *)indexedNode;
+- (id)initWithType:(FIRDataEventType)type indexedNode:(FIndexedNode *)indexedNode childKey:(NSString *)childKey;
+- (id)initWithType:(FIRDataEventType)type
+ indexedNode:(FIndexedNode *)indexedNode
+ childKey:(NSString *)childKey
+ oldIndexedNode:(FIndexedNode *)oldIndexedNode;
+
+- (FChange *) changeWithPrevKey:(NSString *)prevKey;
+@end