| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293 | /* * * 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 "ProtoRPC.h"#import <GPBProtocolBuffers.h>#import <RxLibrary/GRXWriteable.h>#import <RxLibrary/GRXWriter.h>#import <RxLibrary/GRXWriter+Transformations.h>@implementation ProtoRPC {  id<GRXWriteable> _responseWriteable;}- (instancetype)initWithHost:(NSString *)host                      method:(GRPCMethodName *)method              requestsWriter:(id<GRXWriter>)requestsWriter {  return [self initWithHost:host                     method:method             requestsWriter:requestsWriter              responseClass:nil        responsesWriteable:nil];}// Designated initializer- (instancetype)initWithHost:(NSString *)host                      method:(GRPCMethodName *)method              requestsWriter:(id<GRXWriter>)requestsWriter               responseClass:(Class)responseClass          responsesWriteable:(id<GRXWriteable>)responsesWriteable {  // Because we can't tell the type system to constrain the class, we need to check at runtime:  if (![responseClass respondsToSelector:@selector(parseFromData:error:)]) {    [NSException raise:NSInvalidArgumentException                format:@"A protobuf class to parse the responses must be provided."];  }  // A writer that serializes the proto messages to send.  id<GRXWriter> bytesWriter =      [[[GRXWriter alloc] initWithWriter:requestsWriter] map:^id(GPBMessage *proto) {        // TODO(jcanizales): Fail with an understandable error message if the requestsWriter isn't        // sending GPBMessages.        return [proto data];      }];  if ((self = [super initWithHost:host method:method requestsWriter:bytesWriter])) {    // A writeable that parses the proto messages received.    _responseWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {      [responsesWriteable writeValue:[responseClass parseFromData:value error:NULL]];    } completionHandler:^(NSError *errorOrNil) {      [responsesWriteable writesFinishedWithError:errorOrNil];    }];  }  return self;}- (void)start {  [self startWithWriteable:_responseWriteable];}- (void)startWithWriteable:(id<GRXWriteable>)writeable {  [super startWithWriteable:writeable];  // Break retain cycles.  _responseWriteable = nil;}@end
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