1 files changed, 29 insertions, 1 deletions
diff --git a/platform/darwin/src/MGLShapeCollection.mm b/platform/darwin/src/MGLShapeCollection.mm
index e317a443fe..4b468a1cbb 100644
--- a/platform/darwin/src/MGLShapeCollection.mm
+++ b/platform/darwin/src/MGLShapeCollection.mm
@@ -12,12 +12,40 @@
 
 - (instancetype)initWithShapes:(NS_ARRAY_OF(MGLShape *) *)shapes {
     if (self = [super init]) {
-        NSAssert(shapes.count, @"Cannot create an empty shape collection");
         _shapes = shapes.copy;
     }
     return self;
 }
 
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    if (self = [super initWithCoder:decoder]) {
+        _shapes = [decoder decodeObjectOfClass:[NSArray class] forKey:@"shapes"];
+    }
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+    [coder encodeObject:_shapes forKey:@"shapes"];
+}
+
+- (BOOL)isEqual:(id)other {
+    if (self == other) return YES;
+    if (![other isKindOfClass:[MGLShapeCollection class]]) return NO;
+    
+    MGLShapeCollection *otherShapeCollection = other;
+    return [super isEqual:otherShapeCollection]
+    && [_shapes isEqualToArray:otherShapeCollection.shapes];
+}
+
+- (NSUInteger)hash {
+    NSUInteger hash = [super hash];
+    for (MGLShape *shape in _shapes) {
+        hash += [shape hash];
+    }
+    return hash;
+}
+
 - (CLLocationCoordinate2D)coordinate {
     return _shapes.firstObject.coordinate;
 }