mirror of https://gitee.com/bigwinds/arangodb
108 lines
4.1 KiB
C++
108 lines
4.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief AQL, specialized attribute accessor for expressions
|
|
///
|
|
/// @file
|
|
///
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Jan Steemann
|
|
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
|
|
/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "AttributeAccessor.h"
|
|
#include "Aql/Variable.h"
|
|
#include "Basics/StringBuffer.h"
|
|
#include "Basics/json.h"
|
|
#include "ShapedJson/shaped-json.h"
|
|
#include "VocBase/document-collection.h"
|
|
|
|
using namespace triagens::aql;
|
|
using Json = triagens::basics::Json;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors / destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief create the accessor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AttributeAccessor::AttributeAccessor (char const* name,
|
|
Variable const* variable)
|
|
: _name(name),
|
|
_variable(variable),
|
|
_buffer(TRI_UNKNOWN_MEM_ZONE) {
|
|
|
|
TRI_ASSERT(_name != nullptr);
|
|
TRI_ASSERT(_variable != nullptr);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroy the accessor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AttributeAccessor::~AttributeAccessor () {
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public functions
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief execute the accessor
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AqlValue AttributeAccessor::get (triagens::arango::AqlTransaction* trx,
|
|
std::vector<TRI_document_collection_t const*>& docColls,
|
|
std::vector<AqlValue>& argv,
|
|
size_t startPos,
|
|
std::vector<Variable*> const& vars,
|
|
std::vector<RegisterId> const& regs) {
|
|
|
|
size_t i = 0;
|
|
for (auto it = vars.begin(); it != vars.end(); ++it, ++i) {
|
|
if ((*it)->id == _variable->id) {
|
|
|
|
// save the collection info
|
|
TRI_document_collection_t const* collection = docColls[regs[i]];
|
|
|
|
// get the AQL value
|
|
auto& result = argv[startPos + regs[i]];
|
|
|
|
// extract the attribute
|
|
auto j = result.extractObjectMember(trx, collection, _name, true, _buffer);
|
|
return AqlValue(new Json(TRI_UNKNOWN_MEM_ZONE, j.steal()));
|
|
}
|
|
// fall-through intentional
|
|
}
|
|
|
|
return AqlValue(new Json(Json::Null));
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- END-OF-FILE
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
|
|
// End:
|