// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// 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.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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#include <google/protobuf/util/type_resolver_util.h>
#include <google/protobuf/type.pb.h>
#include <google/protobuf/wrappers.pb.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/util/type_resolver.h>
#include <google/protobuf/stubs/status.h>
namespace google {
namespace protobuf {
namespace util {
namespace {
using google::protobuf::BoolValue;
using google::protobuf::Enum;
using google::protobuf::EnumValue;
using google::protobuf::Field;
using google::protobuf::Option;
using google::protobuf::Type;
using util::Status;
using util::error::INVALID_ARGUMENT;
using util::error::NOT_FOUND;
bool SplitTypeUrl(const string& type_url,
string* url_prefix,
string* message_name) {
size_t pos = type_url.find_last_of("/");
if (pos == string::npos) {
return false;
}
*url_prefix = type_url.substr(0, pos);
*message_name = type_url.substr(pos + 1);
return true;
}
class DescriptorPoolTypeResolver : public TypeResolver {
public:
DescriptorPoolTypeResolver(const string& url_prefix,
const DescriptorPool* pool)
: url_prefix_(url_prefix), pool_(pool) {
}
Status ResolveMessageType(const string& type_url, Type* type) {
string url_prefix, message_name;
if (!SplitTypeUrl(type_url, &url_prefix, &message_name) ||
url_prefix != url_prefix_) {
return Status(INVALID_ARGUMENT, "Failed to parse type url: " + type_url);
}
if (url_prefix != url_prefix_) {
return Status(INVALID_ARGUMENT,
"Cannot resolve types from URL: " + url_prefix);
}
const Descriptor* descriptor = pool_->FindMessageTypeByName(message_name);
if (descriptor == NULL) {
return Status(NOT_FOUND, "Cannot found the type: " + message_name);
}
ConvertDescriptor(descriptor, type);
return Status();
}
Status ResolveEnumType(const string& type_url, Enum* enum_type) {
string url_prefix, type_name;
if (!SplitTypeUrl(type_url, &url_prefix, &type_name) ||
url_prefix != url_prefix_) {
return Status(INVALID_ARGUMENT, "Failed to parse type url: " + type_url);
}
if (url_prefix != url_prefix_) {
return Status(INVALID_ARGUMENT,
"Cannot resolve types from URL: " + url_prefix);
}
const EnumDescriptor* descriptor = pool_->FindEnumTypeByName(type_name);
if (descriptor == NULL) {
return Status(NOT_FOUND, "Cannot found the type: " + type_name);
}
ConvertEnumDescriptor(descriptor, enum_type);
return Status();
}
private:
void ConvertDescriptor(const Descriptor* descriptor, Type* type) {
type->Clear();
type->set_name(descriptor->full_name());
for (int i = 0; i < descriptor->field_count(); ++i) {
const FieldDescriptor* field = descriptor->field(i);
if (field->type() == FieldDescriptor::TYPE_GROUP) {
// Group fields cannot be represented with Type. We discard them.
continue;
}
ConvertFieldDescriptor(descriptor->field(i), type->add_fields());
}
for (int i = 0; i < descriptor->oneof_decl_count(); ++i) {
type->add_oneofs(descriptor->oneof_decl(i)->name());
}
type->mutable_source_context()->set_file_name(descriptor->file()->name());
ConvertMessageOptions(descriptor->options(), type->mutable_options());
}
void ConvertMessageOptions(const MessageOptions& options,
RepeatedPtrField<Option>* output) {
if (options.map_entry()) {
Option* option = output->Add();
option->set_name("map_entry");
BoolValue value;
value.set_value(true);
option->mutable_value()->PackFrom(value);
}
// TODO(xiaofeng): Set other "options"?
}
void ConvertFieldDescriptor(const FieldDescriptor* descriptor, Field* field) {
field->set_kind(static_cast<Field::Kind>(descriptor->type()));
switch (descriptor->label()) {
case FieldDescriptor::LABEL_OPTIONAL:
field->set_cardinality(Field::CARDINALITY_OPTIONAL);
break;
case FieldDescriptor::LABEL_REPEATED:
field->set_cardinality(Field::CARDINALITY_REPEATED);
break;
case FieldDescriptor::LABEL_REQUIRED:
field->set_cardinality(Field::CARDINALITY_REQUIRED);
break;
}
field->set_number(descriptor->number());
field->set_name(descriptor->name());
if (descriptor->type() == FieldDescriptor::TYPE_MESSAGE) {
field->set_type_url(GetTypeUrl(descriptor->message_type()));
} else if (descriptor->type() == FieldDescriptor::TYPE_ENUM) {
field->set_type_url(GetTypeUrl(descriptor->enum_type()));
}
if (descriptor->containing_oneof() != NULL) {
field->set_oneof_index(descriptor->containing_oneof()->index() + 1);
}
if (descriptor->is_packed()) {
field->set_packed(true);
}
// TODO(xiaofeng): Set other field "options"?
}
void ConvertEnumDescriptor(const EnumDescriptor* descriptor,
Enum* enum_type) {
enum_type->Clear();
enum_type->set_name(descriptor->full_name());
enum_type->mutable_source_context()->set_file_name(
descriptor->file()->name());
for (int i = 0; i < descriptor->value_count(); ++i) {
const EnumValueDescriptor* value_descriptor = descriptor->value(i);
EnumValue* value =
enum_type->mutable_enumvalue()->Add();
value->set_name(value_descriptor->name());
value->set_number(value_descriptor->number());
// TODO(xiaofeng): Set EnumValue options.
}
// TODO(xiaofeng): Set Enum "options".
}
string GetTypeUrl(const Descriptor* descriptor) {
return url_prefix_ + "/" + descriptor->full_name();
}
string GetTypeUrl(const EnumDescriptor* descriptor) {
return url_prefix_ + "/" + descriptor->full_name();
}
string url_prefix_;
const DescriptorPool* pool_;
};
} // namespace
TypeResolver* NewTypeResolverForDescriptorPool(
const string& url_prefix, const DescriptorPool* pool) {
return new DescriptorPoolTypeResolver(url_prefix, pool);
}
} // namespace util
} // namespace protobuf
} // namespace google