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local_pod_repo/objcTox/OSXDemo/RLMCollectionChange+IndexSet.m

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+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#import "RLMCollectionChange+IndexSet.h"
+
+@implementation RLMCollectionChange (IndexSet)
+
+#pragma mark -  Public
+
+- (NSIndexSet *)deletionsSet
+{
+    return [self indexSetFromNumbersArray:[self deletions]];
+}
+
+- (NSIndexSet *)insertionsSet
+{
+    return [self indexSetFromNumbersArray:[self insertions]];
+}
+
+- (NSIndexSet *)modificationsSet
+{
+    return [self indexSetFromNumbersArray:[self modifications]];
+}
+
+#pragma mark -  Private
+
+- (NSIndexSet *)indexSetFromNumbersArray:(NSArray<NSNumber *> *)numbersArray
+{
+    NSMutableIndexSet *set = [NSMutableIndexSet new];
+
+    for (NSNumber *number in numbersArray) {
+        [set addIndex:number.integerValue];
+    }
+
+    return [set copy];
+}
+
+@end