| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #import "GRXWriteable.h" |
| |
| @implementation GRXWriteable { |
| GRXValueHandler _valueHandler; |
| GRXCompletionHandler _completionHandler; |
| } |
| |
| + (instancetype)writeableWithSingleValueHandler:(GRXSingleValueHandler)handler { |
| if (!handler) { |
| return [[self alloc] init]; |
| } |
| return [[self alloc] initWithValueHandler:^(id value) { |
| handler(value, nil); |
| } completionHandler:^(NSError *errorOrNil) { |
| if (errorOrNil) { |
| handler(nil, errorOrNil); |
| } |
| }]; |
| } |
| |
| + (instancetype)writeableWithStreamHandler:(GRXStreamHandler)handler { |
| if (!handler) { |
| return [[self alloc] init]; |
| } |
| return [[self alloc] initWithValueHandler:^(id value) { |
| handler(NO, value, nil); |
| } completionHandler:^(NSError *errorOrNil) { |
| handler(YES, nil, errorOrNil); |
| }]; |
| } |
| |
| - (instancetype)init { |
| return [self initWithValueHandler:nil completionHandler:nil]; |
| } |
| |
| // Designated initializer |
| - (instancetype)initWithValueHandler:(GRXValueHandler)valueHandler |
| completionHandler:(GRXCompletionHandler)completionHandler { |
| if ((self = [super init])) { |
| _valueHandler = valueHandler; |
| _completionHandler = completionHandler; |
| } |
| return self; |
| } |
| |
| - (void)writeValue:(id)value { |
| if (_valueHandler) { |
| _valueHandler(value); |
| } |
| } |
| |
| - (void)writesFinishedWithError:(NSError *)errorOrNil { |
| if (_completionHandler) { |
| _completionHandler(errorOrNil); |
| } |
| } |
| @end |