New DataModels

1 files changed, 121 insertions, 0 deletions

diff --git a/src/uscxml/plugins/datamodel/null/NULLDataModel.cpp b/src/uscxml/plugins/datamodel/null/NULLDataModel.cpp
new file mode 100644
index 0000000..69970dd
--- /dev/null
+++ b/src/uscxml/plugins/datamodel/null/NULLDataModel.cpp
@@ -0,0 +1,121 @@
+#include "uscxml/Common.h"
+#include "NULLDataModel.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 connect(pluma::Host& host) {
+	host.add( new NULLDataModelProvider() );
+	return true;
+}
+#endif
+
+NULLDataModel::NULLDataModel() {
+}
+
+boost::shared_ptr<DataModelImpl> NULLDataModel::create(InterpreterImpl* interpreter) {
+	boost::shared_ptr<NULLDataModel> dm = boost::shared_ptr<NULLDataModel>(new NULLDataModel());
+	dm->_interpreter = interpreter;
+	return dm;
+}
+
+NULLDataModel::~NULLDataModel() {
+}
+
+void NULLDataModel::pushContext() {
+}
+
+void NULLDataModel::popContext() {
+}
+
+void NULLDataModel::initialize() {
+}
+
+void NULLDataModel::setEvent(const Event& event) {
+}
+
+Data NULLDataModel::getStringAsData(const std::string& content) {
+	Data data;
+	return data;
+}
+
+bool NULLDataModel::validate(const std::string& location, const std::string& schema) {
+	return true;
+}
+
+uint32_t NULLDataModel::getLength(const std::string& expr) {
+  return 0;
+}
+
+void NULLDataModel::eval(const std::string& expr) {
+}
+
+bool NULLDataModel::isDeclared(const std::string& expr) {
+	return true;
+}
+
+/**
+ * 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 NULLDataModel::evalAsBool(const std::string& expr) {
+	std::string trimmedExpr = expr;
+	boost::trim(trimmedExpr);
+	if (!boost::istarts_with(trimmedExpr, "in"))
+		return false;
+	
+	// find string in between brackets
+	size_t start = trimmedExpr.find_first_of("(");
+	size_t end = trimmedExpr.find_last_of(")");
+	if (start == std::string::npos || end == std::string::npos || start >= end)
+		return false;
+	start++;
+	
+	// split at comma
+	std::stringstream ss(trimmedExpr.substr(start, end - start));
+	std::vector<std::string> stateExprs;
+	std::string item;
+	while(std::getline(ss, item, ',')) {
+		stateExprs.push_back(item);
+	}
+	
+	for (unsigned int i = 0; i < stateExprs.size(); i++) {
+		// remove ticks
+		size_t start = stateExprs[i].find_first_of("'");
+		size_t end = stateExprs[i].find_last_of("'");
+
+		std::string stateName;
+		if (start != std::string::npos && end != std::string::npos && start < end) {
+			start++;
+			stateName = stateExprs[i].substr(start, end - start);
+		} else {
+			stateName = stateExprs[i];
+		}
+		
+		if (Interpreter::isMember(_interpreter->getState(stateName), _interpreter->getConfiguration())) {
+			continue;
+		}
+		return false;
+	}
+	return true;
+}
+
+std::string NULLDataModel::evalAsString(const std::string& expr) {
+	return expr;
+}
+
+double NULLDataModel::evalAsNumber(const std::string& expr) {
+	return 0;
+}
+
+}
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