add RATreeView as source

doric-iOS/Devkit/Classes/RATreeView/RATreeNodeItem.m

@@ -0,0 +1,48 @@
+
+//The MIT License (MIT)
+//
+//Copyright (c) 2014 Rafał Augustyniak
+//
+//Permission is hereby granted, free of charge, to any person obtaining a copy of
+//this software and associated documentation files (the "Software"), to deal in
+//the Software without restriction, including without limitation the rights to
+//use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+//the Software, and to permit persons to whom the Software is furnished to do so,
+//subject to the following conditions:
+//
+//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+//FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+//COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+//IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+//CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+
+#import "RATreeNodeItem.h"
+#import "RATreeNodeItem+Private.h"
+#import "RATreeNodeItem+ClassExtension.h"
+
+
+@implementation RATreeNodeItem
+
+- (instancetype)initWithParent:(id)parent index:(NSInteger)index
+{
+  self = [super init];
+  if (self) {
+    _parent = parent;
+    _index = index;
+  }
+  
+  return self;
+}
+
+- (id)item
+{
+  if (!_item) {
+    _item = [self.dataSource itemForTreeNodeItem:self];
+  }
+  return _item;
+}
+
+@end