Json AqlValue::extractObjectMember (triagens::arango::AqlTransaction* trx,
TRI_document_collection_t const* document,
char const* name,
bool copy,
triagens::basics::StringBuffer& buffer) const {
switch (_type) {
case JSON: {
TRI_ASSERT(_json != nullptr);
TRI_json_t const* json = _json->json();
if (TRI_IsObjectJson(json)) {
TRI_json_t const* found = TRI_LookupObjectJson(json, name);
if (found != nullptr) {
if (copy) {
// return a copy of the value
auto c = TRI_CopyJson(TRI_UNKNOWN_MEM_ZONE, found);
if (c == nullptr) {
THROW_ARANGO_EXCEPTION(TRI_ERROR_OUT_OF_MEMORY);
}
return Json(TRI_UNKNOWN_MEM_ZONE, c, triagens::basics::Json::AUTOFREE);
}
// return a pointer to the original value, without asking for its ownership
return Json(TRI_UNKNOWN_MEM_ZONE, found, triagens::basics::Json::NOFREE);
}
}
// attribute does not exist or something went wrong - fall-through to returning null below
return Json(Json::Null);
}
case SHAPED: {
TRI_ASSERT(document != nullptr);
TRI_ASSERT(_marker != nullptr);
// look for the attribute name in the shape
if (*name == '_' && name[1] != '\0') {
if (name[1] == 'k' && strcmp(name, TRI_VOC_ATTRIBUTE_KEY) == 0) {
// _key value is copied into JSON
return Json(TRI_UNKNOWN_MEM_ZONE, TRI_EXTRACT_MARKER_KEY(_marker));
}
if (name[1] == 'i' && strcmp(name, TRI_VOC_ATTRIBUTE_ID) == 0) {
// _id
buffer.reset();
trx->resolver()->getCollectionName(document->_info._cid, buffer);
buffer.appendChar('/');
buffer.appendText(TRI_EXTRACT_MARKER_KEY(_marker));
return Json(TRI_UNKNOWN_MEM_ZONE, buffer.c_str(), buffer.length());
}
if (name[1] == 'r' && strcmp(name, TRI_VOC_ATTRIBUTE_REV) == 0) {
// _rev
TRI_voc_rid_t rid = TRI_EXTRACT_MARKER_RID(_marker);
buffer.reset();
buffer.appendInteger(rid);
return Json(TRI_UNKNOWN_MEM_ZONE, buffer.c_str(), buffer.length());
}
if (name[1] == 'f' &&
strcmp(name, TRI_VOC_ATTRIBUTE_FROM) == 0 &&
(_marker->_type == TRI_DOC_MARKER_KEY_EDGE ||
_marker->_type == TRI_WAL_MARKER_EDGE)) {
buffer.reset();
trx->resolver()->getCollectionNameCluster(TRI_EXTRACT_MARKER_FROM_CID(_marker), buffer);
buffer.appendChar('/');
buffer.appendText(TRI_EXTRACT_MARKER_FROM_KEY(_marker));
return Json(TRI_UNKNOWN_MEM_ZONE, buffer.c_str(), buffer.length());
}
if (name[1] == 't' &&
strcmp(name, TRI_VOC_ATTRIBUTE_TO) == 0 &&
(_marker->_type == TRI_DOC_MARKER_KEY_EDGE ||
_marker->_type == TRI_WAL_MARKER_EDGE)) {
buffer.reset();
trx->resolver()->getCollectionNameCluster(TRI_EXTRACT_MARKER_TO_CID(_marker), buffer);
buffer.appendChar('/');
buffer.appendText(TRI_EXTRACT_MARKER_TO_KEY(_marker));
return Json(TRI_UNKNOWN_MEM_ZONE, buffer.c_str(), buffer.length());
}
}
auto shaper = document->getShaper();
TRI_shape_pid_t pid = shaper->lookupAttributePathByName(name);
if (pid != 0) {
// attribute exists
TRI_shaped_json_t document;
TRI_EXTRACT_SHAPED_JSON_MARKER(document, _marker);
TRI_shaped_json_t json;
TRI_shape_t const* shape;
bool ok = shaper->extractShapedJson(&document, 0, pid, &json, &shape);
if (ok && shape != nullptr) {
auto v = TRI_JsonShapedJson(shaper, &json);
if (v == nullptr) {
THROW_ARANGO_EXCEPTION(TRI_ERROR_OUT_OF_MEMORY);
}
return Json(TRI_UNKNOWN_MEM_ZONE, v);
}
}
// attribute does not exist or something went wrong - fall-through to returning null
break;
}
case DOCVEC:
case RANGE:
case EMPTY: {
break;
}
}
return Json(Json::Null);
}
