Handle<Object> ParsePart(const google::protobuf::Message &message) {
HandleScope scope;
const Reflection* r = message.GetReflection();
const Descriptor* descriptor = message.GetDescriptor();
Local<Array> properties = Array::New(descriptor->field_count());
for (int i = 0; i < descriptor->field_count(); i++) {
const FieldDescriptor* field = descriptor->field(i);
bool repeated = field->is_repeated();
if (repeated && !r->FieldSize(message, field)) continue;
if (!repeated && !r->HasField(message, field)) continue;
Handle<Value> value;
if (field->is_repeated()) {
int size = r->FieldSize(message, field);
Handle<Array> array = Array::New(size);
for (int j = 0; j < size; j++)
array->Set(j, ParseField(message, r, field, j));
value = array;
} else {
value = ParseField(message, r, field, -1);
}
if (value->IsNull()) continue;
properties->Set(i, value);
}
Local<Function> from_array = handle_->GetInternalField(2).As<Function>();
Handle<Value> args = properties;
return scope.Close(from_array->NewInstance(1, &args));
}
Type(Protobuf* _protobuf, google::protobuf::Message *_message, Handle<Object> self, size_t _index) {
protobuf = _protobuf;
message = _message;
descriptor = _message->GetDescriptor();
index = _index;
// Generate functions for bulk conversion between a JS object
// and an array in descriptor order:
// from = function(arr) { this.f0 = arr[0]; this.f1 = arr[1]; ... }
// to = function() { return [ this.f0, this.f1, ... ] }
// This is faster than repeatedly calling Get/Set on a v8::Object.
std::ostringstream from, to;
from << "(function(arr) { if(arr) {";
to << "(function() { return [ ";
for (int i = 0; i < descriptor->field_count(); i++) {
std::string name = descriptor->field(i)->name();
from << "var x = arr[" << i << "]; if (x !== undefined) this['" << name << "'] = x; ";
if (i > 0) to << ", ";
to << "this['" << name << "']";
}
from << " }})";
to << " ]; })";
// managed type->schema link
self->SetInternalField(1, protobuf->handle_);
self->SetInternalField(2, Script::Compile(String::New(from.str().c_str()))->Run());
self->SetInternalField(3, Script::Compile(String::New(to.str().c_str()))->Run());
Wrap(self);
}
void SerializePart(google::protobuf::Message *message, Handle<Object> src) {
Handle<Function> to_array = handle_->GetInternalField(3).As<Function>();
Handle<Array> properties = to_array->Call(src, 0, NULL).As<Array>();
const Reflection *r = message->GetReflection();
for (int i = 0; i < descriptor->field_count(); i++) {
Local<Value> value = properties->Get(i);
if (value->IsUndefined() || value->IsNull())
continue;
const FieldDescriptor* field = descriptor->field(i);
if (field->is_repeated()) {
if (value->IsArray()) {
Handle<Array> array = value.As<Array>();
int length = array->Length();
for (int j = 0; j < length; j++)
SerializeField(message, r, field, array->Get(j));
}
else if (value->IsObject() &&
field->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE &&
field->message_type()->name().compare(0, 20, "KeyValuePair_String_") == 0) {
Local<Object> object = value.As<Object>();
Local<Array> subProperties = object->GetOwnPropertyNames();
int len = subProperties->Length();
for (int keyIdx = 0; keyIdx < len; keyIdx++) {
Local<Object> keyValuePair = Object::New();
Local<Value> key = subProperties->Get(keyIdx);
keyValuePair->Set(KeySymbol, key);
keyValuePair->Set(ValueSymbol, object->Get(key));
SerializeField(message, r, field, keyValuePair);
}
}
} else {
SerializeField(message, r, field, value);
}
}
}