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/**
* @file
* @author 2012-2014 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#include <boost/algorithm/string.hpp>
#include "uscxml/Common.h"
#include "LuaDataModel.h"
#include "LuaBridge.h"
#include "uscxml/DOMUtils.h"
#include "uscxml/Message.h"
#include <glog/logging.h>
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
namespace uscxml {
#ifdef BUILD_AS_PLUGINS
PLUMA_CONNECTOR
bool pluginConnect(pluma::Host& host) {
host.add( new LuaDataModelProvider() );
return true;
}
#endif
LuaDataModel::LuaDataModel() {
_luaState = NULL;
}
static int luaEventData(lua_State * l);
static int luaEventOrigin(lua_State * l);
static int luaEventOriginType(lua_State * l);
static int luaEventRaw(lua_State * l);
static int luaEventXML(lua_State * l);
static int luaEventName(lua_State * l);
static int luaEventContent(lua_State * l);
static int luaEventSendId(lua_State * l);
static int luaEventInvokeId(lua_State * l);
static int luaEventDestructor(lua_State * l);
static int luaInFunction(lua_State * l) {
luabridge::LuaRef ref = luabridge::getGlobal(l, "__interpreter");
InterpreterImpl* interpreter = ref.cast<InterpreterImpl*>();
int stackSize = lua_gettop(l);
for (int i = 0; i < stackSize; i++) {
if (!lua_isstring(l, -1 - i))
continue;
std::string stateName = lua_tostring(l, -1 - i);
if (interpreter->isInState(stateName))
continue;
lua_pushboolean(l, 0);
return 1;
}
lua_pushboolean(l, 1);
return 1;
}
boost::shared_ptr<DataModelImpl> LuaDataModel::create(InterpreterImpl* interpreter) {
boost::shared_ptr<LuaDataModel> dm = boost::shared_ptr<LuaDataModel>(new LuaDataModel());
dm->_interpreter = interpreter;
dm->_luaState = luaL_newstate();
luaL_openlibs(dm->_luaState);
luabridge::getGlobalNamespace(dm->_luaState).beginClass<InterpreterImpl>("__interpreter").endClass();
luabridge::getGlobalNamespace(dm->_luaState).addCFunction("In", luaInFunction);
luabridge::setGlobal(dm->_luaState, dm->_interpreter, "__interpreter");
return dm;
}
LuaDataModel::~LuaDataModel() {
if (_luaState != NULL)
lua_close(_luaState);
}
void LuaDataModel::pushContext() {
}
void LuaDataModel::popContext() {
}
void LuaDataModel::initialize() {
}
void LuaDataModel::setEvent(const Event& event) {
}
Data LuaDataModel::getStringAsData(const std::string& content) {
Data data = Data::fromJSON(content);
if (data.empty()) {
data = Data(content, Data::VERBATIM);
}
return data;
}
bool LuaDataModel::validate(const std::string& location, const std::string& schema) {
return true;
}
bool LuaDataModel::isLocation(const std::string& expr) {
return true;
}
uint32_t LuaDataModel::getLength(const std::string& expr) {
return 0;
}
void LuaDataModel::setForeach(const std::string& item,
const std::string& array,
const std::string& index,
uint32_t iteration) {
}
void LuaDataModel::eval(const Arabica::DOM::Element<std::string>& scriptElem,
const std::string& expr) {
}
bool LuaDataModel::isDeclared(const std::string& expr) {
return true;
}
void LuaDataModel::assign(const Arabica::DOM::Element<std::string>& assignElem,
const Arabica::DOM::Node<std::string>& node,
const std::string& content) {
}
void LuaDataModel::assign(const std::string& location, const Data& data) {
}
void LuaDataModel::init(const Arabica::DOM::Element<std::string>& dataElem,
const Arabica::DOM::Node<std::string>& node,
const std::string& content) {
}
void LuaDataModel::init(const std::string& location, const Data& data) {
}
/**
* The boolean expression language consists of the In predicate only. It has the
* form 'In(id)', where id is the id of a state in the enclosing state machine.
* The predicate must return 'true' if and only if that state is in the current
* state configuration.
*/
bool LuaDataModel::evalAsBool(const Arabica::DOM::Node<std::string>& node, const std::string& expr) {
// we need the result of the expression on the lua stack -> has to "return"!
std::string trimmedExpr = boost::trim_copy(expr);
if (!boost::starts_with(trimmedExpr, "return")) {
trimmedExpr = "return(" + trimmedExpr + ")";
}
int error = luaL_loadstring(_luaState, trimmedExpr.c_str()) || lua_pcall(_luaState, 0, LUA_MULTRET, 0);
if (error) {
std::string errMsg = lua_tostring(_luaState, -1);
lua_pop(_luaState, 1); /* pop error message from the stack */
ERROR_EXECUTION_THROW(errMsg);
}
int stackSize = lua_gettop(_luaState);
if (stackSize != 1)
return false;
if (lua_isboolean(_luaState, -1))
return lua_toboolean(_luaState, -1);
return false;
}
std::string LuaDataModel::evalAsString(const std::string& expr) {
return expr;
}
double LuaDataModel::evalAsNumber(const std::string& expr) {
return 0;
}
}
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