| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| public struct NamedCollectionPTransform: _PrimitivePTransform { |
| let name: String |
| let collection: AnyPCollection |
| } |
| |
| /// Captures a PCollection and gives it a name so it can be referenced |
| public struct Tag<Of>: PTransform { |
| let name: String |
| let fn: () -> PCollection<Of> |
| public init(_ name: String, _ fn: @escaping () -> PCollection<Of>) { |
| self.name = name |
| self.fn = fn |
| } |
| |
| public var expand: NamedCollectionPTransform { |
| NamedCollectionPTransform(name: name, collection: AnyPCollection(fn())) |
| } |
| } |
| |
| /// Convenience mapping for more readable composites |
| public typealias Output = Tag |
