1/* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19#import "GRXMappingWriter.h" 20 21@interface GRXForwardingWriter ()<GRXWriteable> 22@end 23 24@implementation GRXMappingWriter { 25 id (^_map)(id value); 26} 27 28- (instancetype)initWithWriter:(GRXWriter *)writer { 29 return [self initWithWriter:writer map:nil]; 30} 31 32// Designated initializer 33- (instancetype)initWithWriter:(GRXWriter *)writer map:(id (^)(id value))map { 34 if ((self = [super initWithWriter:writer])) { 35 _map = map ?: ^id(id value) { 36 return value; 37 }; 38 } 39 return self; 40} 41 42// Override 43- (void)writeValue:(id)value { 44 [super writeValue:_map(value)]; 45} 46@end 47