1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // https://developers.google.com/protocol-buffers/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 #import <Foundation/Foundation.h> 32 33 @class GPBDescriptor; 34 @class GPBExtensionDescriptor; 35 36 NS_ASSUME_NONNULL_BEGIN 37 38 /// A table of known extensions, searchable by name or field number. When 39 /// parsing a protocol message that might have extensions, you must provide a 40 /// @c GPBExtensionRegistry in which you have registered any extensions that you 41 /// want to be able to parse. Otherwise, those extensions will just be treated 42 /// like unknown fields. 43 /// 44 /// The @c *Root classes provide @c +extensionRegistry for the extensions defined 45 /// in a given file *and* all files it imports. You can also create a 46 /// @c GPBExtensionRegistry, and merge those registries to handle parsing 47 /// extensions defined from non overlapping files. 48 /// 49 /// @code 50 /// GPBExtensionRegistry *registry = 51 /// [[[MyProtoFileRoot extensionRegistry] copy] autorelease]; 52 /// [registry addExtension:[OtherMessage neededExtension]; // Not in MyProtoFile 53 /// NSError *parseError = nil; 54 /// MyMessage *msg = [MyMessage parseData:data 55 /// extensionRegistry:registry 56 /// error:&parseError]; 57 /// @endcode 58 @interface GPBExtensionRegistry : NSObject<NSCopying> 59 60 /// Add the given @c GPBExtensionDescriptor to this registry. 61 /// 62 /// @param extension The extension description to add. 63 - (void)addExtension:(GPBExtensionDescriptor *)extension; 64 65 /// Adds all the extensions from another registry to this registry. 66 /// 67 /// @param registry The registry to merge into this registry. 68 - (void)addExtensions:(GPBExtensionRegistry *)registry; 69 70 /// Looks for the extension registered for the given field number on a given 71 /// @c GPBDescriptor. 72 /// 73 /// @param descriptor The descriptor to look for a registered extension on. 74 /// @param fieldNumber The field number of an extension to look for. 75 /// 76 /// @return The registered @c GPBExtensionDescripto or nil if none was found. 77 - (nullable GPBExtensionDescriptor *)extensionForDescriptor:(GPBDescriptor *)descriptor 78 fieldNumber:(NSInteger)fieldNumber; 79 80 @end 81 82 NS_ASSUME_NONNULL_END 83
