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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 <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
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