mirror of https://gitee.com/bigwinds/arangodb
134 lines
4.6 KiB
C++
134 lines
4.6 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief Aql, V8 expression
|
|
///
|
|
/// @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 "Aql/V8Expression.h"
|
|
#include "Aql/V8Executor.h"
|
|
#include "Aql/Variable.h"
|
|
#include "BasicsC/json.h"
|
|
#include "V8/v8-conv.h"
|
|
|
|
using namespace triagens::aql;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- constructors / destructors
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief create the v8 expression
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
V8Expression::V8Expression (v8::Isolate* isolate,
|
|
v8::Persistent<v8::Function> func)
|
|
: isolate(isolate),
|
|
func(func) {
|
|
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroy the v8 expression
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
V8Expression::~V8Expression () {
|
|
func.Dispose(isolate);
|
|
func.Clear();
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- public methods
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief execute the expression
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AqlValue V8Expression::execute (AQL_TRANSACTION_V8* 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 const n = vars.size();
|
|
TRI_ASSERT(regs.size() == n); // assert same vector length
|
|
|
|
// TODO: only convert those variables to V8 that are actually used in the expression
|
|
v8::Handle<v8::Object> values = v8::Object::New();
|
|
for (size_t i = 0; i < n; ++i) {
|
|
auto varname = vars[i]->name;
|
|
auto reg = regs[i];
|
|
|
|
TRI_ASSERT(! argv[reg].isEmpty());
|
|
|
|
values->Set(v8::String::New(varname.c_str(), (int) varname.size()), argv[startPos + reg].toV8(trx, docColls[reg]));
|
|
}
|
|
|
|
// set function arguments
|
|
v8::Handle<v8::Value> args[] = { values };
|
|
|
|
// execute the function
|
|
v8::TryCatch tryCatch;
|
|
v8::Handle<v8::Value> result = func->Call(func, 1, args);
|
|
|
|
V8Executor::HandleV8Error(tryCatch, result);
|
|
|
|
// no exception was thrown if we get here
|
|
TRI_json_t* json = nullptr;
|
|
|
|
if (result->IsUndefined()) {
|
|
// expression does not have any (defined) value. replace with null
|
|
json = TRI_CreateNullJson(TRI_UNKNOWN_MEM_ZONE);
|
|
}
|
|
else {
|
|
// expression had a result. convert it to JSON
|
|
json = TRI_ObjectToJson(result);
|
|
}
|
|
|
|
if (json == nullptr) {
|
|
THROW_ARANGO_EXCEPTION(TRI_ERROR_OUT_OF_MEMORY);
|
|
}
|
|
|
|
try {
|
|
auto j = new triagens::basics::Json(TRI_UNKNOWN_MEM_ZONE, json);
|
|
return AqlValue(j);
|
|
}
|
|
catch (...) {
|
|
// prevent memleak
|
|
TRI_FreeJson(TRI_UNKNOWN_MEM_ZONE, json);
|
|
throw;
|
|
}
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- END-OF-FILE
|
|
// -----------------------------------------------------------------------------
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
|
|
// End:
|