+ data()->addAttribute(VARIABLE_ID(), ModelAPI_AttributeString::typeId());
+ data()->addAttribute(EXPRESSION_ID(), ModelAPI_AttributeString::typeId());
+ data()->addAttribute(ARGUMENTS_ID(), ModelAPI_AttributeRefList::typeId());
+ data()->reflist(ARGUMENTS_ID())->setIsArgument(false);
+ ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), ARGUMENTS_ID());
+}
+
+bool ParametersPlugin_Parameter::isInHistory()
+{
+ return false;
+}
+
+void ParametersPlugin_Parameter::attributeChanged(const std::string& theID)
+{
+ if (theID == EXPRESSION_ID())
+ updateExpression();
+}
+
+void ParametersPlugin_Parameter::updateName()
+{
+ std::string aName = string(VARIABLE_ID())->value();
+ data()->setName(aName);
+
+ ResultParameterPtr aParam = document()->createParameter(data());
+ aParam->data()->setName(aName);
+ setResult(aParam);
+}
+
+void ParametersPlugin_Parameter::updateExpression()
+{
+ std::string anExpression = string(EXPRESSION_ID())->value();
+ if(anExpression.empty()) {
+ // clear error/result if the expression is empty
+ setError("", false);
+ return;
+ }
+ std::string outErrorMessage;
+ double aValue = evaluate(anExpression, outErrorMessage);
+ std::ostringstream sstream;
+ sstream << aValue;
+ std::string aParamValue = sstream.str();
+ // Error
+ if (!outErrorMessage.empty()) {
+ std::string aStateMsg("Error: " + outErrorMessage);
+ data()->execState(ModelAPI_StateExecFailed);
+ setError(aStateMsg, false);
+ } else {
+ static const std::string anEmptyMsg(""); // it is checked in the validator by the empty message
+ setError(anEmptyMsg, false);
+ data()->execState(ModelAPI_StateDone);
+ }
+
+ ResultParameterPtr aParam = document()->createParameter(data());
+ AttributeDoublePtr aValueAttribute = aParam->data()->real(ModelAPI_ResultParameter::VALUE());
+ aValueAttribute->setValue(aValue);
+ setResult(aParam);