1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 *   http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 
20 import Foundation
21 
22 public protocol TTransport {
23 
24   // Required
readnull25   func read(size: Int) throws -> Data
26   func write(data: Data) throws
27   func flush() throws
28 
29   // Optional (default provided)
30   func readAll(size: Int) throws -> Data
31   func isOpen() throws -> Bool
32   func open() throws
33   func close() throws
34 }
35 
36 public extension TTransport {
37   func isOpen() throws -> Bool { return true }
38   func open() throws { }
39   func close() throws { }
40 
41   func readAll(size: Int) throws -> Data {
42     var buff = Data()
43     var have = 0
44     while have < size {
45       let chunk = try self.read(size: size - have)
46       have += chunk.count
47       buff.append(chunk)
48       if chunk.count == 0 {
49         throw TTransportError(error: .endOfFile)
50       }
51     }
52     return buff
53   }
54 }
55 
56 public protocol TAsyncTransport : TTransport {
57   // Factory
58   func flush(_ completion: @escaping (TAsyncTransport, Error?) ->())
59 }
60 
61 public protocol TAsyncTransportFactory {
62   associatedtype Transport : TAsyncTransport
newTransportnull63   func newTransport() -> Transport
64 }
65