Initial

1 files changed, 43 insertions, 0 deletions

diff --git a/Firebase/Database/FTransformedEnumerator.m b/Firebase/Database/FTransformedEnumerator.m
new file mode 100644
index 0000000..bb36e94
--- /dev/null
+++ b/Firebase/Database/FTransformedEnumerator.m
@@ -0,0 +1,43 @@
+/*
+ * 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 "FTransformedEnumerator.h"
+
+@interface FTransformedEnumerator ()
+@property (nonatomic, strong) NSEnumerator *enumerator;
+@property (nonatomic, copy) id (^transform)(id);
+@end
+
+@implementation FTransformedEnumerator
+- (id)initWithEnumerator:(NSEnumerator *)enumerator andTransform:(id (^)(id))transform {
+    self = [super init];
+    if (self) {
+        self.enumerator = enumerator;
+        self.transform = transform;
+    }
+    return self;
+}
+
+- (id)nextObject {
+    id next = self.enumerator.nextObject;
+    if (next != nil) {
+        return self.transform(next);
+    } else {
+        return nil;
+    }
+}
+
+@end