diff options
Diffstat (limited to 'src/google/protobuf/descriptor.cc')
-rw-r--r-- | src/google/protobuf/descriptor.cc | 107 |
1 files changed, 98 insertions, 9 deletions
diff --git a/src/google/protobuf/descriptor.cc b/src/google/protobuf/descriptor.cc index 9226dfbc..76b7219f 100644 --- a/src/google/protobuf/descriptor.cc +++ b/src/google/protobuf/descriptor.cc @@ -42,10 +42,12 @@ #include <google/protobuf/descriptor.h> #include <google/protobuf/descriptor_database.h> #include <google/protobuf/descriptor.pb.h> +#include <google/protobuf/dynamic_message.h> #include <google/protobuf/text_format.h> #include <google/protobuf/unknown_field_set.h> #include <google/protobuf/wire_format.h> #include <google/protobuf/io/coded_stream.h> +#include <google/protobuf/io/tokenizer.h> #include <google/protobuf/io/zero_copy_stream_impl.h> #include <google/protobuf/stubs/common.h> #include <google/protobuf/stubs/once.h> @@ -2056,6 +2058,8 @@ class DescriptorBuilder { // Otherwise returns true. bool InterpretOptions(OptionsToInterpret* options_to_interpret); + class AggregateOptionFinder; + private: // Interprets uninterpreted_option_ on the specified message, which // must be the mutable copy of the original options message to which @@ -2082,6 +2086,11 @@ class DescriptorBuilder { bool SetOptionValue(const FieldDescriptor* option_field, UnknownFieldSet* unknown_fields); + // Parses an aggregate value for a CPPTYPE_MESSAGE option and + // saves it into *unknown_fields. + bool SetAggregateOption(const FieldDescriptor* option_field, + UnknownFieldSet* unknown_fields); + // Convenience functions to set an int field the right way, depending on // its wire type (a single int CppType can represent multiple wire types). void SetInt32(int number, int32 value, FieldDescriptor::Type type, @@ -2128,6 +2137,10 @@ class DescriptorBuilder { // can use it to find locations recorded by the parser. const UninterpretedOption* uninterpreted_option_; + // Factory used to create the dynamic messages we need to parse + // any aggregate option values we encounter. + DynamicMessageFactory dynamic_factory_; + GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(OptionInterpreter); }; @@ -2139,6 +2152,8 @@ class DescriptorBuilder { // redundantly declare OptionInterpreter a friend just to make things extra // clear for these bad compilers. friend class OptionInterpreter; + friend class OptionInterpreter::AggregateOptionFinder; + static inline bool get_allow_unknown(const DescriptorPool* pool) { return pool->allow_unknown_; } @@ -3973,9 +3988,6 @@ bool DescriptorBuilder::OptionInterpreter::InterpretSingleOption( intermediate_fields.push_back(field); descriptor = field->message_type(); } - } else if (field->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) { - return AddNameError("Option field \"" + debug_msg_name + - "\" cannot be of message type."); } } @@ -4310,18 +4322,95 @@ bool DescriptorBuilder::OptionInterpreter::SetOptionValue( break; case FieldDescriptor::CPPTYPE_MESSAGE: - // We don't currently support defining a message-typed option, so we - // should never actually get here. - return AddValueError("Option \"" + option_field->full_name() + - "\" is a message. To set fields within it, use " - "syntax like \"" + option_field->name() + - ".foo = value\"."); + if (!SetAggregateOption(option_field, unknown_fields)) { + return false; + } break; } return true; } +class DescriptorBuilder::OptionInterpreter::AggregateOptionFinder + : public TextFormat::Finder { + public: + DescriptorBuilder* builder_; + + virtual const FieldDescriptor* FindExtension( + Message* message, const string& name) const { + if (builder_->pool_->mutex_ != NULL) { + builder_->pool_->mutex_->AssertHeld(); + } + Symbol result = builder_->LookupSymbolNoPlaceholder( + name, message->GetDescriptor()->full_name()); + if (result.type == Symbol::FIELD && + result.field_descriptor->is_extension()) { + return result.field_descriptor; + } else { + return NULL; + } + } +}; + +// A custom error collector to record any text-format parsing errors +namespace { +class AggregateErrorCollector : public io::ErrorCollector { + public: + string error_; + + virtual void AddError(int line, int column, const string& message) { + if (!error_.empty()) { + error_ += "; "; + } + error_ += message; + } + + virtual void AddWarning(int line, int column, const string& message) { + // Ignore warnings + } +}; +} + +// We construct a dynamic message of the type corresponding to +// option_field, parse the supplied text-format string into this +// message, and serialize the resulting message to produce the value. +bool DescriptorBuilder::OptionInterpreter::SetAggregateOption( + const FieldDescriptor* option_field, + UnknownFieldSet* unknown_fields) { + if (!uninterpreted_option_->has_aggregate_value()) { + return AddValueError("Option \"" + option_field->full_name() + + "\" is a message. To set the entire message, use " + "syntax like \"" + option_field->name() + + " = { <proto text format> }\". " + "To set fields within it, use " + "syntax like \"" + option_field->name() + + ".foo = value\"."); + } + + const Descriptor* type = option_field->message_type(); + scoped_ptr<Message> dynamic(dynamic_factory_.GetPrototype(type)->New()); + GOOGLE_CHECK(dynamic.get() != NULL) + << "Could not create an instance of " << option_field->DebugString(); + + AggregateErrorCollector collector; + AggregateOptionFinder finder; + finder.builder_ = builder_; + TextFormat::Parser parser; + parser.RecordErrorsTo(&collector); + parser.SetFinder(&finder); + if (!parser.ParseFromString(uninterpreted_option_->aggregate_value(), + dynamic.get())) { + AddValueError("Error while parsing option value for \"" + + option_field->name() + "\": " + collector.error_); + return false; + } else { + string serial; + dynamic->SerializeToString(&serial); // Never fails + unknown_fields->AddLengthDelimited(option_field->number(), serial); + return true; + } +} + void DescriptorBuilder::OptionInterpreter::SetInt32(int number, int32 value, FieldDescriptor::Type type, UnknownFieldSet* unknown_fields) { switch (type) { |