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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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.
#include <iostream>
#include <google/protobuf/compiler/objectivec/objectivec_extension.h>
#include <google/protobuf/compiler/objectivec/objectivec_helpers.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/io/printer.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace objectivec {
ExtensionGenerator::ExtensionGenerator(const TProtoStringType& root_class_name,
const FieldDescriptor* descriptor)
: method_name_(ExtensionMethodName(descriptor)),
root_class_and_method_name_(root_class_name + "_" + method_name_),
descriptor_(descriptor) {
if (descriptor->is_map()) {
// NOTE: src/google/protobuf/compiler/plugin.cc makes use of cerr for some
// error cases, so it seems to be ok to use as a back door for errors.
std::cerr << "error: Extension is a map<>!"
<< " That used to be blocked by the compiler." << std::endl;
std::cerr.flush();
abort();
}
}
ExtensionGenerator::~ExtensionGenerator() {}
void ExtensionGenerator::GenerateMembersHeader(io::Printer* printer) {
std::map<TProtoStringType, TProtoStringType> vars;
vars["method_name"] = method_name_;
if (IsRetainedName(method_name_)) {
vars["storage_attribute"] = " NS_RETURNS_NOT_RETAINED";
} else {
vars["storage_attribute"] = "";
}
SourceLocation location;
if (descriptor_->GetSourceLocation(&location)) {
vars["comments"] = BuildCommentsString(location, true);
} else {
vars["comments"] = "";
}
// Unlike normal message fields, check if the file for the extension was
// deprecated.
vars["deprecated_attribute"] = GetOptionalDeprecatedAttribute(descriptor_, descriptor_->file());
printer->Print(vars,
"$comments$"
"+ (GPBExtensionDescriptor *)$method_name$$storage_attribute$$deprecated_attribute$;\n");
}
void ExtensionGenerator::GenerateStaticVariablesInitialization(
io::Printer* printer) {
std::map<TProtoStringType, TProtoStringType> vars;
vars["root_class_and_method_name"] = root_class_and_method_name_;
const TProtoStringType containing_type = ClassName(descriptor_->containing_type());
vars["extended_type"] = ObjCClass(containing_type);
vars["number"] = StrCat(descriptor_->number());
std::vector<TProtoStringType> options;
if (descriptor_->is_repeated()) options.push_back("GPBExtensionRepeated");
if (descriptor_->is_packed()) options.push_back("GPBExtensionPacked");
if (descriptor_->containing_type()->options().message_set_wire_format()) {
options.push_back("GPBExtensionSetWireFormat");
}
vars["options"] = BuildFlagsString(FLAGTYPE_EXTENSION, options);
ObjectiveCType objc_type = GetObjectiveCType(descriptor_);
if (objc_type == OBJECTIVECTYPE_MESSAGE) {
TProtoStringType message_type = ClassName(descriptor_->message_type());
vars["type"] = ObjCClass(message_type);
} else {
vars["type"] = "Nil";
}
vars["default_name"] = GPBGenericValueFieldName(descriptor_);
if (descriptor_->is_repeated()) {
vars["default"] = "nil";
} else {
vars["default"] = DefaultValue(descriptor_);
}
TProtoStringType type = GetCapitalizedType(descriptor_);
vars["extension_type"] = TProtoStringType("GPBDataType") + type;
if (objc_type == OBJECTIVECTYPE_ENUM) {
vars["enum_desc_func_name"] =
EnumName(descriptor_->enum_type()) + "_EnumDescriptor";
} else {
vars["enum_desc_func_name"] = "NULL";
}
printer->Print(vars,
"{\n"
" .defaultValue.$default_name$ = $default$,\n"
" .singletonName = GPBStringifySymbol($root_class_and_method_name$),\n"
" .extendedClass.clazz = $extended_type$,\n"
" .messageOrGroupClass.clazz = $type$,\n"
" .enumDescriptorFunc = $enum_desc_func_name$,\n"
" .fieldNumber = $number$,\n"
" .dataType = $extension_type$,\n"
" .options = $options$,\n"
"},\n");
}
void ExtensionGenerator::DetermineObjectiveCClassDefinitions(
std::set<TProtoStringType>* fwd_decls) {
TProtoStringType extended_type = ClassName(descriptor_->containing_type());
fwd_decls->insert(ObjCClassDeclaration(extended_type));
ObjectiveCType objc_type = GetObjectiveCType(descriptor_);
if (objc_type == OBJECTIVECTYPE_MESSAGE) {
TProtoStringType message_type = ClassName(descriptor_->message_type());
fwd_decls->insert(ObjCClassDeclaration(message_type));
}
}
void ExtensionGenerator::GenerateRegistrationSource(io::Printer* printer) {
printer->Print(
"[registry addExtension:$root_class_and_method_name$];\n",
"root_class_and_method_name", root_class_and_method_name_);
}
} // namespace objectivec
} // namespace compiler
} // namespace protobuf
} // namespace google
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